Commons:Featured picture candidates/File:Catedral da Sé, São Paulo, Brasil.jpg

File:Catedral da Sé, São Paulo, Brasil.jpg

Voting period is over. Please don't add any new votes.Voting period ends on 24 Feb 2021 at 19:57:37 (UTC)
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Gallery: Commons:Featured pictures/Places/Interiors/Religious_buildings#Brazil
Info All by -- Wilfredor (talk) 19:57, 15 February 2021 (UTC)[reply]
Neutral It looks like perspective issues and the windows in the background are overexposed. IMO a little bit noisy too and the sharpness should be better. --XRay 💬 06:42, 16 February 2021 (UTC)[reply]
Oppose Sorry, there are too many quality issues like CAs, blown windows, unsharp altar, noise. Furthermore, cylindrical projektion ist not a good choice here. --Uoaei1 (talk) 09:24, 16 February 2021 (UTC)[reply]
Oppose Agree with Uoae1. Diliff usually uses f/11 or f/13 with a 50mm lens e.g. File:Ely Cathedral Choir, Cambridgeshire, UK - Diliff.jpg. Do you think the focus got bumped as you panned around? I see you took this at 18mm which means fewer stitches but also potentially bigger jumps between the stitches. So if you haven't got the entrance pupil lined up with the panoramic head, you'll have bigger stitching errors. This point will also change when you shift from 18mm to 35mm, so you need to work it out for both. I suggest you try again at 35mm and f/11. I know you had tourists here so wanted a fast exposure, but waiting till they were gone would have meant you could have used a lower ISO. Diliff had two other advantages. By taking many smaller shots at 50mm, he downsized (e.g. 50%) his photos yet the result was still amazingly big, and they were all sharp at 100%. He also used HDR which much reduces noise by combining 5 images. The HDR also solves the problem with the windows. What software are you using for stitching? I think you will need PtGuiPro. You can post on my talk page if you want to discuss software more. -- Colin (talk) 18:28, 17 February 2021 (UTC)[reply]

Dear Colin, thank you very much for the technical information, I have taken note of it. I have managed to align the nodal point very well at home and I think that I could obtain very high quality images, I also solved a problem of the panoramic head by buying a special key. 5 images to make HDR sounds pretty sensible and so does the depth of field also I am waiting for an opportunity to do it, this photo was taken a long time ago in Brazil and I did not use a panoramic head or tripod because I had to do it quickly because it is a dangerous place in the city (Sao Paulo centro). BTW, this camera is an aps-c, Did diliff use 50mm in FF or in Aps-c?. Thanks --Wilfredor (talk) 21:57, 17 February 2021 (UTC)[reply]

Ah, I assumed this was your new camera. That makes f/18 even less appropriate and one cause of overall softness. I think f/8 on APS-C is similar to about f/11 on FF. Diliff used FF and prime lenses. -- — Preceding unsigned comment added by Colin (talk • contribs)

apertures equivalence are derived from the crop factor (easy to remember ;)). So f/8 in APS-C = f/12 in FF. Because of camera equivalence, Diliff and I once came to the conclusion that there is NO advantage to use FF to shot interior panorama. The setup he used on his FF gear could be replicated on APS-C. And before going big, remember your shooting time is also limited. A reason Diliff bumped ISO is that he had a life aside taking photo inside churches :-) (and that counts when a panorama requires dozens of photos, each with different exposures...) - Benh (talk) 13:57, 18 February 2021 (UTC)[reply]

Thanks for the clarification, I generally take between 2 to 3 hours to do a 360 panorama and 2 hours to do a normal panorama. Raising the ISO this time could be reduced considerably, I also think that an FF will generate less noise added to an HDR of 5 images that will also reduce noise (although it could also create little sharpness?). --Wilfredor (talk) 14:43, 18 February 2021 (UTC)[reply]

No, FF won't generate less noise if u shoot at equivalent setting (equivalent aperture, same exposure time), and yes HDR will reduce noise, without affecting sharpness if u have a sturdy tripod. -

Comment Picture of the day 2021-02-19 ! -- Llez (talk) 07:16, 19 February 2021 (UTC)[reply]

I added the question to the talk page of FPC because I cant underestand how the image can be in the main page if its not FP --Wilfredor (talk) 11:58, 19 February 2021 (UTC)[reply]

I withdraw my nomination Thank you very much everyone for the comments especially with the technical details to improve. Unfortunately this image is not recoverable --Wilfredor (talk) 20:11, 19 February 2021 (UTC)[reply]