Commons:Featured picture candidates/File:Syrphus torvus macro 02.jpg

File:Syrphus torvus macro 02.jpg, not featured

Voting period is over. Please don't add any new votes.Voting period ends on 22 Mar 2022 at 23:58:09 (UTC)
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Featured picture candidates/File:Syrphus torvus macro 02.jpg Commons:Featured picture candidates/File:Syrphus torvus macro 02.jpg

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Stacking error

• Gallery: Commons:Featured pictures/Animals/Arthropods/Diptera#Family : Syrphidae (Hoverflies)
•  Info Handheld stack of 3 picture of the head of Syrphus torvus, magnification of 2.5:1, all by Alexis Lours -- Alexis Lours (talk) 23:58, 13 March 2022 (UTC)
•  Support -- Alexis Lours (talk) 23:58, 13 March 2022 (UTC)
•  Support Incredibly impressive, I don't know how one manages to handhold this Cmao20 (talk) 17:57, 14 March 2022 (UTC)
•  Support, especially for the compound eye. -- Ikan Kekek (talk) 20:28, 14 March 2022 (UTC)
•  Support --Fischer.H (talk) 09:46, 15 March 2022 (UTC)
•  Support Dinkum (talk) 18:57, 15 March 2022 (UTC)
•  Support --Schnobby (talk) 07:49, 16 March 2022 (UTC)
•  Oppose Hand holding a 2.5x magnification focus stack is impressive, but I don't think the result is on par with other macro shots we've seen here. The image is somewhat soft and oversharpened, the flash has overexposed several areas, and there are a few stacking errors (e.g. in the compound eye). --Julesvernex2 (talk) 11:17, 16 March 2022 (UTC)

• Where are there stacking errors in the eye? Ikan Kekek (talk) 17:15, 16 March 2022 (UTC)

•  Oppose I've marked them. Is 3 images too few? I'm not familiar wich this type of shot. Charlesjsharp (talk) 17:22, 16 March 2022 (UTC)

• I've added another one, which may indeed have been caused by a gap in the stack. Assuming that the eye eye has a depth of about 1mm, 3 images are enough if the lens is stepped down to f16. However, at a magnification of 2.5x this means that the effective aperture is f56, well into diffraction territory. Using an aperture of f2.8 (f9.8 effective aperture) would produce significantly sharper results, but would require about 20 shots to get the entire eye in focus ([1]) --Julesvernex2 (talk) 18:45, 16 March 2022 (UTC)

• Charlesjsharp, thanks for marking the stacking errors. They're subtle to me, especially on top, and I feel like it's still an FP, but of course I respect your opposition from a position of expertise. -- Ikan Kekek (talk) 19:12, 16 March 2022 (UTC)

•  Oppose per Julesvernex2 and Charles --Ermell (talk) 10:33, 17 March 2022 (UTC)
•  Oppose per other opposers. --Ivar (talk) 13:46, 19 March 2022 (UTC)

Confirmed results:

Result: 6 support, 4 oppose, 0 neutral → not featured. /Ikan Kekek (talk) 05:54, 23 March 2022 (UTC)