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User:Franz van Duns

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Noia 64 apps karm.svgThis user has been on Commons for
1 year, 2 months and 13 days
1,000+This user has made over 1,000 contributions to Commons, including over 58 uploaded images.
Wikipedia-logo-v2.svg This user has a page on Wikipedia.
This user has a page on the German Wikipedia.
Flag map of Germany.svg
This user comes from Germany.
Coat of arms of North Rhine-WestfaliaThis user / dieser Benutzer
en:   resides in North Rhine-Westphalia
de:   wohnt in Nordrhein-Westfalen.
Coat of arms of DortmundThis user / dieser Benutzer
en:   is a resident of Dortmund
de:   wohnt in Dortmund.
Coat of arms of AplerbeckThis user / dieser Benutzer
en:   is a resident of Aplerbeck
de:   wohnt in Aplerbeck.

POTD logo2 images uploaded by this user have been nominated as "Image du jour / POTD 2019-08-14" /"POTD 2019-08-29"on the French Wikipedia
Valued image seal.svgThis user has uploaded 2 valued images to Wikimedia Commons.
Cscr-featured.svgThis user has uploaded 3 featured pictures to Wikimedia Commons.
Quality images logo.svgThis user has uploaded 17 quality images to Wikimedia Commons.
Wikilove BarnstarThis user has been awarded the Wikilove Barnstar.
Working Man's BarnstarThis user has been awarded the Working Man's Barnstar for "Tireless work in Quality images categorization".
File:Camera2 mgx.svg - representing "Winner of a Wiki Commons Challenge", level silver medal.An image taken by this user has been ranked 2nd place in the Wiki Photo Challenge June 2019.
Empty asciiThis user contributes images with extended depth of field using Focus Stacking technique.
Empty asciiThis user contributes enhanced resolution images using Sony PixelShift technology (with Sony Alpha 7RIII).
Empty asciiThis user contributes stereo images arranged for crosseye-viewing.
Pictogram representing a single frame of 35mm filmThis user has uploaded 1 digitised image originally taken on reverse film material.
Adobe Photoshop Lightroom CC logo.svgThis user contributes using Adobe Photoshop Lightroom.
Adobe Photoshop CC icon.svgThis user contributes using Adobe Photoshop.

Windows logo - 2012.svgThis user contributes using Microsoft Windows.
Mozilla FirefoxThis user contributes using
Mozilla Firefox.
Zerene StackerThis user contributes using
Zerene Stacking Pro software.
Empty asciiThis user contributes using
Virtualbox logoThis user contributes using
Pictogram of lensThis user owns and regularly uses Zeiss Batis and Zeiss lenses (for Sony E-mount).
Pictogram of lensThis user owns and regularly uses a Sony 90mm macro lens and a Sigma 135mm lens (via Sigma Canon to E-mount converter).
Pictogram of lensThis user owns and optionally uses Canon FD lenses (via Novoflex E-mount converter).
Pictogram of lensThis user owns and optionally uses Leica lenses (via Novoflex E-mount converter).

Babel user information
en-N This user has a native understanding of English.
de-N Dieser Benutzer spricht Deutsch als Muttersprache.
Users by language



Challenge March 2019 - Town halls: The Amtshaus (communal town hall) of Aplerbeck, a suburb of Dortmund, Germany in extreme detail. Quality image, participated in wiki commons challenge March 2019 - Town halls
The Lion of Venice as a tourist trinket - made in China, sold in Venice

site management site verification
Purge this site's cache This is a user page dedicated to Wiki Commons only. Should you find this page on any other site, you will be viewing an unauthorised copy!

My Activities within the Wiki Universe[edit]


Wiki commons:

Longines pocket watch, model 4 Grand Prix, 1900ff, rear view, clockwork visible - enhanced resolution

Just over a year ago I joined Wiki Commons, and have learned a lot since then. The dos and don'ts directly from the community, many technical facts concerning the inner works of Wiki itself by picking up multiple bits of code and further information from the numerous pages I have visted.

  • Before that date I had spent many evenings screening through reams of both Wikipedia and Wiki Commons pages ever since their inception at the turn of this century.
  • The technical facts and a slew of interesting links I have discovered en route are all documented in the tables on the latter part of this, my user page.
  • I will continue to provide materiél and live up to my aim to give back some of the joy and wisdom I have before so freely received from others.

Donating images:

An age-worn door latch and a rusted padlock fastened to well-weathered planks - original image taken on Kodachrome 25 colour reversal film in Dötlingen, Germany, May 1980

Thus I seek to contribute selected photographs to the global community. Photographs as allowed by German law, depicting mostly living and inanimate objects of nature. All derived from digital and analogue stocks of mine.

Experience: I have accumulated 50+ years of experience as a photographer, 46 years with ever improving single lens reflex camera systems. I have experimented with multiple lighting arragements, and various image editing programmes, but have till this day not once shared any of my photographs with any other persons than my family, closest friends, and, of course, the many wedding couples I have depicted. This state of encapsulation shall now end!

Exa outfit: My first single lens reflex camera was an East-German-built Exa body, purchased in 1972. Two lenses were sufficient: 50mm and 135mm. Started off with negative films, later colour slides.

Canon FD / Leica outfits:

Canon 15mm f2.8 SSC fisheye lens and its original satchel

I still own an extensive set of Canon FD lenses, all prime, and A-1 / AE-1 bodies, ranging from a 15mm fish eye lens to a 500mm mirror telescopic lens, all purchased in the early 1980'ies. The 50mm, 80mm and 100mm macro lenses provide the best quality. Marriage added a substantial set of Leica bodies and prime lenses. This analogue outfit has served me well right up to approx. the year 2010, but did not allow true HDR nor focus stacking, and only imperfect panoramas.

Olympus E10 outfit: My first digital camera was an Olympus E10, sporting a small sensor with an impressive count of 4 megapixels and a fixed zoom lens.

Sony Alpha 7R / Canon FD adapter: Come 2014 with the introduction of the Sony Alpha 7R body. The ideal camera for me, as I could attach all my lenses via adapter to the Sony body. Now high-resolution stereo photography, HDR (high dynamic range), high-resolution focus stacking, highly detailed macro photography, and quasi-perfect panoramas were within reach.

Sony Alpha 7RII / Zeiss lenses:

Sigma 135mm F1.8 DG HSM A Canon EF lens & compatible Sigma MC-11 Mount Converter

Very soon it became clear that the 1.8/55mm Zeiss prime lens I had purchased with the body was way better than the previously used Canon FD 55mm 1.2 lens. Since then I have purchased both a Sony Alpha 7RII with a built-in stabiliser, a set of Zeiss Batis prime lenses (1.8/85mm, 2/25mm, 2.8/18mm) plus a Zeiss/Sony 2.8/90mm macro G OSS prime lens. Most recent addition: a Sigma 1.8/135mm DG prime lens plus Sigma Canon EOS to Sony E lens adapter.
All these modern lenses provide the superb quality required for large-scale crops, especially in combination with the sturdy (and heavy) tripod I have been using regularly ever since purchase in 1980. But take note that the bokeh effect with the old but proven FD lenses is in general far more pleasing than the (multiple) rings visible within the bokeh circles one can attain with modern aspherical lenses.

The Sony Alpha 7RII body sports a sensor resolution of 42 megapixels. The image size is 7952x5304 pixels.

Sony Alpha 7RIII: My most recent addition (8th July, 2019): a Sony Alpha 7RIII body. I have updated the camera software and am still customising the various branches within the extensive set of primary settings. First attempts with the Sony's "pixelshift" function have met with success, provided that (a) the object to be imaged is absolutely immobile, (b) the camera is set on a very stable base (a window sill or the like), (c) any shake removing function (such as the Sony "steadyshot" function) is deactivated, and (d) the exposure release is activated by a self-timer (here: 10 seconds, although imho 3 seconds would suffice). I will provide a series of images soon which will illustrate the improved resolution.
Note 1: the Sony manual states that the "pixelshift" function deactivates the shutter to eliminate all shaking and activates the electronic shutter instead.
Note 2: the pixel count of 42 megapixels remains the same, but as the sensor moves through 4 positions programmed for "pixelshift" (initial position > then up > right > down) the Bayer colour pattern moves in sync (i.e., green > red > green > blue). Thus each pixel is supplied with all three RGB colours (albeit 2x green) and the resulting image need not be averaged over overlapping blocks of 4 pixels, but will depict every single pixel in its individual glory. Sounds strange, but works very well provided all factors contributing to even the slightest movement have been fully eliminated.

Historical Cameras:

In the course of the past 30 years I have collected some 30 historical cameras.

  • One of the oldest is a sturdy SLR body, manufactured from 1928-1936 with an internal 3 1/4" (83 mm) x 2 1/4" (58 mm) mirror in a roughly cubic outer shape.
    It sports a collapsible leather viewer rising to a height of 5,5" (142 mm).
  • The other cameras range from Minox-sized to folding bellows cameras that take 6 cm x 9 cm roll films.

I intend to supply high-quality images of all cameras within my collection.

Lumiere Super ELJY type3 miniature camera with LYPAR 50mm f3.5 lensKodak box camera, type Rainbow Hawk-Eye No. 2 British Model C for 120 roll film, disassembled


An age-worn door latch and a rusted padlock fastened to well-weathered planks - original image taken on Kodachrome 25 colour reversal film in Dötlingen, Germany, May 1980.

I am currently digitising the best of my slides and negatives. I have so far uploaded one digitised slide, taken on Kodachrome 25 reverse film (ISO 25 diafilm), see below. I intend to provide more historically interesting or high-quality photographs derived from slides, negative films or black and white films.


The Amtshaus (communal town hall) of Aplerbeck, a suburb of Dortmund, Germany in extreme detail. Also participated in wiki commons challenge March 2019 - Town halls

Panoramas up to 7952 pixels wide are created by simply cropping a suitable image. Larger panoramas (with a higher pixel count and/or multi-row) are created by stitching more than one intersecting image via specialised software. I have been using a multitude of Adobe Photoshop versions for this purpose since 1999.

Focus stacking:

Beginning and end: A well-formed needle following a single groove from its fixed starting point provides a stream of music all along its inevitable track toward the record's natural inner termination. A tribute to the classic record player.

Having loosely experimented with focus Stacking software since 2012, I have in the past 4 years delved into the finesses of the software product Zerene Stacker Pro. Following up a series of thorough testing with objects of varying size, depth and complexity, also in comparison with the product Helicon Focus, I finally purchased Zerene Stacker Pro in mid-2018. High resolution focus stacks are mostly taken in sheltered quarters, but are also attainable outdoor with the camera steadied on an tripod if the subject remains motionless due to lack of wind.


Tigridia pavonia - wilted overnight - 2018-07-25 composite image via focus stacking (German: Tigerlilie - über Nacht verwelkt), magnification ratio 1:1.3.

A Macro photograph is a close-up image of a subject. In the early days of photography a ratio of 1:10 or less on full frame film was considered "macro", i.e. subject height 240mm or less. Nowadays macro imaging closes up on 1:1 (subject height 24mm), beginning somewhere in the vicinity of 1:3. The image on the right sports a magnification ratio of 1:1.3 at full frame. i.e the whole height of the image was approx. 31mm.


Two Passiflora caerulea flowers arranged as a stereo image pair, Dortmund, June 2019. Quality image

The two images of the stereo pair usually sport an offset by 50-65mm between viewpoints. If combined with macro photography the spacing between viewpoints is often reduced to 20-30mm as more will strain the untrained viewer's ability to combine the images. I prefer the crosseye-viewing method that swaps the placing of the left and right eye images so that they will be correctly seen cross-eyed, the left eye viewing the image on the right and vice versa, the intended stereo image appearing in between.

HDR: I have yet to find a suitable software to correctly process HDR images. The software products I have used so far more often than not tend to introduce strange colouring effects and unnatural fringes. I thus have discontinued this technique since 2016 and have taken resort to processing uncompressed RAW files whenever possible, as the Sony Alpha 7RII sensor can discern slightly more than 10 aperture values of dynamic range at ISO 100, which are subsequently stored as 14 bit RAW values. Maybe the HDR situation has improved meanwhile and is worth another try.

Combining techniques / stereo: I have also experimented with combinations of the above techniques: focus stacking of panoramas, panorama HDRs, macro stereo sets comprising two focus stacks. Not all are represented in the files I have uploaded to Wiki Commons this far.

Experience with Photography-related Technology[edit]

User:Franz van Duns/Focus Stacking

User:Franz van Duns/HowTo align image content

User:Franz van Duns/Sandbox


For the knowledgeable:
Franz van Duns

Suggestions for improvement welcome.

German version intended.

Submitted Files[edit]

Click to see:     FileList.      

Valued image seal.svg Valued Images[edit]

Valued Image

      Valued image seal.svg All Valued Images depicted here were taken by Franz van Duns.

Cscr-featured.svg Featured Pictures / POTD logo POTD - Picture of the Day[edit]

Featured Picture

      Cscr-featured.svg All Featured Pictures depicted here were taken by Franz van Duns.
      POTD logo Two images have been, i.e. will be, displayed as "Image du jour" (POTD - Picture of the Day) on the French wikipedia.

Rolling the computer mouse over the gallery will also reveal the images slated as POTD.

Quality images logo.svg Quality Images[edit]

Quality image declaration

Quality images logo.svg
Quality image
This image has been assessed using the Quality image guidelines and is considered a Quality image.

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      Quality images logo.svg All Quality Images depicted here were taken by Franz van Duns (including those that have been promoted to "Featured picture" or another higher status)

Original Barnstar Hires.png Barnstar Awards[edit]

Original Barnstar Hires.png The Original Barnstar For uploading File:Distrail splits stratocumulus cloud - remnants of contrail visible ( DSC2134-1).jpg, a valuable, well-described and usefully-documented contribution. Many thanks! Ariadacapo (talk) 17:58, 5 July 2019 (UTC) A distrail splits the outer region of a stratocumulus cloud; remnants of contrail visible, Dortmund, June 2019.

Working Man's Barnstar.png Working Man's Barnstar
I hereby award you, Franz van Duns the Working Man's Barnstar for your tirelesst work you're doing in Quality images categorization. Thank you! Mit freundlichen Grüßen -- George Chernilevsky talk 13:21, 16 August 2019 (UTC)

Winners / Runners Up of a Wiki Commons Challenge[edit]

Locks and keys - a quintuple misfit.jpg Photo Challenge – Second Place
Camera2 mgx silver.svg

Your picture Locks and keys - a quintuple misfit.jpg won the 2nd place in the Photo Challenge Keys and Keyholes, in June 2019. You can find the results of the challenge here.

-- Jarekt (talk) 03:44, 2 August 2019 (UTC)
Addendum: this silver medalist image was awarded 7 stars (and 7 likes).

Submissions to Wiki Commons Challenges[edit]

Recent Uploads[edit]

Placeholder for images that have recently been uploaded. Images promoted to Quality / Featured status or submitted to a Wiki Commons Challenge will immediately be transferred to the corresponding sections above.

Favourite Images[edit]

Composite Images[edit]

Images Created by Focus Stacking[edit]

Very High Resolution Images (at least one dimension has a minimum size of 10,000 pixels)[edit]

Stereo Images[edit]

Analogue Images / Now Digitised[edit]

Other Images[edit]

Technical Assistance[edit]

I have provided technical assistance for the following images taken by others:

Promotion Assistance[edit]

I have promoted the following images which were taken by others:

Useful Links[edit]

Wiki Commons[edit]

Image guidelines


Commons:Deletion policy   >   Note: to have a recently uploaded image removed, simply tag it as {{speedy|reason for deletion}}


When to use the {{PD-Art}} tag   >   See also: Reuse of PD-Art photographs


  Wikipedia:Articles for creation/Scam warning

Assorted links:

  Focus stacking

Commons:Photography Critiques[edit]


Straight to the current "wiki commons photo challenge"

  How to submit a new entry / example: Commons:Photo_challenge/2019_-_June_-_Geology (Edit)

  How to vote for up to three images / example: Commons:Photo_challenge/2019_-_April_-_Prisons/Voting



Commons:Quality Images[edit]

Commons:Quality images candidates   >   preceded by rules for nomination as a quality image.

Quality images candidates list

Quality images recently promoted

Commons:Featured Images[edit]

Commons:Featured pictures   >   preceded by rules for nomination as a featured picture.

Featured images candidates list

Admissible categories see: COM:FP

Template:Featured picture candidates overview

Category:Featured pictures by subject   >   root page for all featured images.

  Commons:Featured pictures/Objects

Commons:Valued Images[edit]

Difference between quality images, featured pictures, and valued images:

Note: the following text was extracted from page Commons:Valued images:

  • The quality images project aims to identify and encourage users who provide images of high technical quality to Commons.
  • Featured pictures are the cream of the crop at Commons and the project is reserved for images of both extraordinary value and technical quality.
  • Valued images, on the other hand, are those that are the most valuable of their kind for use in an online context, within other Wikimedia projects.
  • The technical requirements for valued images are typically much lower, as there is no concern about suitability for print usage. A built-in camera in a modern mobile phone should be sufficient if the subject is of high value and the photo illustrates it well at a viewing size of 480×360 pixels or equivalent.
  • Valued images are less about technical quality and more about your ingenuity in finding good and valuable subjects which matter, and about the usability of the information on the image page.

Commons:Valued images   >   contains rules regarding nomination as a valued image.

Valued image criteria

Valued image scope

Valued image candidates nomination procedure

Valued images candidates list

  Valued images candidates list - Example image

Valued images candidates list

Category:Valued images by subject

  Category:Valued images of photography equipment

Special Information[edit]

  Special:SpecialPages   >   Sections: Maintenance reports, Lists of pages, Login / create account, Users and rights, Recent changes and logs, Media reports and uploads, Data and tools, Redirecting special pages, High use pages, Page tools, Wikibase, Other special pages, Legend.

  Special:PrefixIndex   >   Usage: Find items within reserved namespaces by their initial letter(s); choose namespace from the namespace dropdown list, e.g. category or template, ...


General Policies Regarding Templates[edit]



Specialised Templates for use within Wiki Commons[edit]

  Template:Panorama   >   Usage: {{Panorama | 1=Description of the subject | 2=Number of images used | 3=Software used}}

  Template:Focus stacked image   >   Usage: {{Focus stacked image | 1=Description of the subject | 2=Number of images used | 3=Software used}}

  List of templates containing the PrefixIndex "User" within Wiki Commons

  Collection of links to lists of utility templates Wiki Commons

    List of string manipulation templates within Wiki Commons

  Template:Assessments   >   Usage: {{Assessments | featured=1 | enwiki=1 | com-nom=Bar.jpg | ...}}

  Template:Category   >   Usage: {{Category | 1=category name | 2=namespace | 3=sortkey}}

    Template:Cat see also   >   Usage: {{Cat see also| 1=name of category to link to | 2,3,4,...=names of further categories to link to | iw=interwiki prefix | for=descriptive text to append}}

  Template:Colorbox   >   Usage: {{Colorbox | 1=background | 2=text | 3=link | title=tooltip}}

Inter-Wiki Category Templates[edit]

See also #Other Wiki Branches / Interwiki Links

  Template:C   >   Establishes a link to a category, either within Wiki Commons or to another Wikipedia
      >   Usage: {{ C | 1=category name, optional namespace | 2=displayed text | 3=interwiki access, via language code | 4=+/- precedes category name with namespace "Category:" }}
      >   Note: {{c | Category:XYZ | ...}} is seemingly identical to {{w | c:Category:XYZ | ...}}

Specialised Non-Wiki-Commons Templates (Wikipedia / MetaWiki)[edit]

  Template explained: Wikipedia:Transclusion

  List of string manipulation templates within Wikipedia   >   contains far more templates than Wiki Commons

  List of string manipulation templates within MetaWiki   >   contains additional templates


Categories - General Policies[edit]

  Commons:Categories   >   How to use

  MetaWiki: Help:Category#Sort_key   >   How to apply a sort key to a category

Examples for Hierarchical Categories[edit]

  Category:Meta categories   >   contains only subcategories but no images

    Category:Files by technical criteria   >   contains only subcategories but no images

      Category:Images by technical criteria   >   contains only subcategories but no images

        Category:Images by resolution   >   contains only subcategories but no images

          Category:High-resolution   >   contains subcategories and images

            Category:High-resolution images of architecture   >   contains only images

Linking to other Wiki Branches / Interwiki Links[edit]

Wiki Template (for Inter-Wiki usage)[edit]

INFO: Explore page Template:W

Interwiki Abbreviations[edit]

Interwiki abbreviations are placed within the Template:W in the form "|3=language-id:wiki-abbreviation".

Table of wiki-abbreviations: Template:W#Localization, scroll to table "Complex page name examples" to see advanced examples.

3=language-id   no wiki-abbreviation    

Wikipedia for that language


























Inter-Wiki Category Template[edit]

  Template:C   >   Establishes a link to a category, either within Wiki Commons or to another Wikipedia
      >   Usage: {{ C | 1=category name, optional namespace | 2=displayed text | 3=interwiki access, via language code | 4=+/- precedes category name with namespace "Category:" }}
      >   Note: {{c | Category:XYZ | ...}} is seemingly identical to {{w | c:Category:XYZ | ...}}

Inter-Wiki Communication Template - Methods A[edit]

Wikimedia user groups




Inter-Wiki Communication Template - Methods B[edit]

Found a simple, concise method to send a simple "thank you" to another wiki user.

   Method 1: via talk pages. 
   Method 2: send a "thanks for editing" in the edit history of files and wiki commons pages.
   Method 3: Using template Reply to, described as follows as Method C. 

Inter-Wiki Communication Template - Method C[edit]

{{Reply to|user-name}}[edit]

Aliases: ping, replyto, mention


This template takes advantage of the new user mention notification to ping the user(s) you are replying to in a discussion (so you don't have to use the {{talkback}} template).
It works on any talk page or Project namespace page. It also works on the Support Desk.

This template is particularly helpful in discussions that are not threaded, to indicate which user's comment is referenced. If you feel that this template unnecessarily personalizes the discussion, you may still use the {{talkback}} template on the user's talk page to indicate that you have replied to a comment.

Note that it isn't necessary to use this template to ping (indicate) the user if you are already linking to their username from your post.

Single recipient[edit]

To use it, just add something like the following to an existing discussion:

{{reply to|User1}} Exemplary message text. ~~~~

For example, ":{{reply to|user-name}} Message text." displays as:

   @user-name: Message text.

The comment must be signed and belong to a section in order for the notification to work.

Multiple recipients[edit]

You can reply to up to 5 people at once:

{{reply to|User-1|User-II|User-C}} Message text. ~~~~



Significant Categories and Media[edit]


  Photographs of stamen and anthers



  Category:Historic sites in Scotland

  Josephinische Landaufnahme pg022.jpg


  File:A spectacular Mandelbox inside flight with music in 4K UHD 24022019.webm

Further Reading[edit]

Commons:Photography terms

User:Colin/PixelPeeping   >   Some thoughts on when "pixel peeping" is irrelevant and when even mandatory.


Created Wikidata item "Taken with Sigma 135mm F1.8 DG HSM"

Wiki Tools[edit]


  Wikimedia Toolforge

  Wikimedia Tool svgcheck: Check a SVG file for Wikimedia compatibility

Recommended status after validity check:

This vector image was created with Inkscape.

Template:Created with Inkscape   >   Usage: {{Created with Inkscape | 1=name of user or author | 2=Validity (v, n, or s) | topic = f, i, or m}}

Historical Cameras (Wikipedia EN)[edit]


  Folding camera

  Box camera

  Single-lens reflex camera

  Subminiature camera

Categories of Cameras (Wiki Commons)[edit]


  Category:Cameras by type

    Category:Viewfinder cameras

    Category:Rangefinder cameras

    Category:Subminiature cameras

    Category:Wooden cameras

    Category:SLR cameras

    Category:Folding cameras

    Category:Cameras by mount No EF, no FE

    Category:Cameras by format

Categories of Cameras Accessories and More[edit]

Category:Photography accessories

  Category:Camera accessories

    Category:Camera bellows

  Category:Tripods (photography)

  Category:Photographs taken with tripods

Non-technical Categories concerning Photography (Wiki Commons)[edit]

Category:Cameras by brand

  Category:Kodak cameras

    Category:Kodak photographic film cameras

  Category:Sony Alpha (E-mount)

Category:Cameras by year

Category:Cameras by country

Category:Cameras by color

Category:Quality images of cameras and photographic equipment

Photography Techniques[edit]

Focus Stacking[edit]

  Category:Focus stacking images by subject

    Category:Focus stacking images of photography equipment



    Category:High-resolution images of architecture


  Category:Stereoscopic 3D files (side-by-side crosseye)

  Category:Stereoscopic 3D files (side-by-side parallel)

Projects and Initiatives within Wikipedia / Wikimedia[edit]

Wikipedia:WikiProject Photography

Uploading mishaps[edit]

Image notes / annotations do not appear

  • Problem: Image notes / image annotations won't show up since a new version of the image was uploaded.
  • Check: Check whether the image dimensions have changed, this is sometimes barely perceptible.
  • Reason: The positions of image notes are strictly linked to the image's dimensions. This is to prevent wrong positioning if someone changes the image size, even by simply one single pixel.
  • Possible causes: Any tilt / perspective correction of your image after your initial upload could reduce or sometimes even slightly enlarge image size.

Temporary Collections[edit]

Interactions within Wiki[edit]

  • To send a notice to someone which will appear as a notice on his/her user page, use the template:re, i.e. {{re|Franz van Duns}}

Extract / Examples from above page:

Licensing within Wikis[edit]

Wiki-internal Usage and Logs[edit]

Links of General Interest[edit]

Linking to Pages on other Wikis[edit]

Linking from within Wiki Commons[edit]

Wikipedia / English:

Wikipedia / Deutsch:

Wikipedia / français:

Template with which to link from one Wikipedia to another[edit]

Caveat: Only works for links to pages (also template, special, etc. pages) within other wikis, but cannot resolve templates which are only defined on that other wiki, such as {{Picture of the day}} defined within the english wikipedia.

Wikipedia Documentation[edit]

Here's a list of recommendations concerning the use of wikipedia.

English Wikipedia

German Wikipedia

More information[edit]

  • One question for which, despite having done a lot of searching, I am still trying to find an answer: on which page within wikipedia do I find the basis of the claim that an image must have been included within a wikipedia article for at least 7 days before it may be proposed as a "Featured picture"?
    • Eureka! Have found the relevant site: Wikipedia:Featured picture criteria
      • Advance to criterion no. 5:   "Adds significant encyclopedic value to an article ..."
      • Read bullet no. 1:   "... It is preferable to wait a reasonable period of time (at least 7 days) after the image is added to the article before nominating it. ..."
  • Category:Featured pictures (explicitly featured in Wikipedia) that have not appeared on the main page

Wikipedia featured pictures[edit]


Wikipedia Lost and Found[edit]

Interesting articles, facts, and pages I have found on my journey through die realms of Wikipedia:

  1. The Wikipedia Monopoly Board.
  2. Examples of mathematical symbols and box diagrammes: Image sensor format


  • ...

POTD on selected Wikis[edit]

POTD on Wiki Commons: