File:Crescent Moon -- 100% crop (5724541856).jpg
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| Description |
Crescent moon - 100% crop from 8(?) stacked subexposures Image Scale = 1.11 arc-second/pixel Date: 2011/05/07 Exposure: 8(?) out of 13 x 1/80 sec at approximately f/9, ISO 100 Lens: Nikon 800mm f/5.6 ED AI-S at about f/9 (seemed sharper than f/5.6, f/8, or f/11) Camera : unmodified Canon T2i = 550D Mount: Astro-Physics AP900 -- rough polar alignment (no drift alignment) Processing: Focusing via EOS utility live view, exposures made from live view mode (EFSC active, so no mirror slap or first shutter curtain shake?). 13 individual shots cropped to 1800 x 1000 with Photoshop CS4 to do rough alignment (Registax does not like exposures unless they are approximately aligned first). Alignment and stacking in Registax 5 with "50% drizzle". The intention was to keep the best 8 out of the 13 frames in the stack (there was no confirmation of this). The stacked output was saved as a single 3599 x 1999 TIF, and then "wavelets" processing was done with the default settings. This seemed to have no effect, so the wavelets output was ignored. Photoshop CS4 levels adjustment and unsharp mask processing was done, along with downsizing back to 1800 x 1000 and JPEG conversion (quality = 11). No useful colors were present, but some purple tones got in there somehow, so the image was completely desaturated before JPEG conversion. |
| Date | |
| Source | Crescent Moon -- 100% crop |
| Author | s58y |
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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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This image was originally posted to Flickr by s58y at https://flickr.com/photos/45032885@N04/5724541856. It was reviewed on 19 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:26, 19 December 2021 | | 1,000 × 1,800 (300 KB) | Siloepic (talk | contribs) | Transferred from Flickr via #flickr2commons |
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