Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
by andy-m                

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Jan
6
accepted What happens when a Sony SLT camera is operated with mirror up?
Jan
6
revised What is the DT series of Sony lenses?
added 858 characters in body
Jan
6
answered What is the DT series of Sony lenses?
Jan
6
asked What happens when a Sony SLT camera is operated with mirror up?
Jan
4
revised What apertures are required to enable autofocus, including cross-type or high-precision focusing, on Canon DSLR cameras?
Added attribution for images
Dec
29
answered Is back-button autofocus possible on the Nikon D7000?
Dec
29
comment When you zoom in with a lens on an SLR why does the lens go in then out?
I don't wish to delete the answer, but I am willing to lose acceptance. This answer nonetheless demonstrates a misconception in lens design, so it could be useful to some people. Though it is technically wrong, it's not obviously wrong, so I will keep it as the linked MSO answer advises.
Dec
29
comment When you zoom in with a lens on an SLR why does the lens go in then out?
Note that the Canon 18-55 has five independent groups: canon.com/camera-museum/camera/lens/ef/data/ef-s/…
Dec
29
comment When you zoom in with a lens on an SLR why does the lens go in then out?
@mattdm, I cannot delete it because it has been accepted.
Dec
29
revised When you zoom in with a lens on an SLR why does the lens go in then out?
edited body
Dec
29
revised When you zoom in with a lens on an SLR why does the lens go in then out?
deleted 11 characters in body
Dec
29
comment When you zoom in with a lens on an SLR why does the lens go in then out?
@ZachGirod, please accept Edgar Bonet's answer. My answer is incorrect. :(
Dec
29
revised When you zoom in with a lens on an SLR why does the lens go in then out?
answer is incorrect
Dec
27
comment What camera and lens do I need to get started doing sports photography?
@mattdm, as the owner of a K-r, I can say that it does a decent job with indoor sports with the 55-300mm lens, but I still have to deal with a lens that is slow in both in terms of aperture and of autofocus. I'm afraid that even the K-r 18-55/55-300 dual lens kit might be just past his budget...
Dec
26
comment When you zoom in with a lens on an SLR why does the lens go in then out?
@EdgarBonet, this may be true for prime lenses, but the lens in question is a zoom lens. As such, the lens configuration can change from retrofocus to telephoto as you zoom from wide to long.
Dec
26
revised When you zoom in with a lens on an SLR why does the lens go in then out?
added 23 characters in body; added 32 characters in body
Dec
26
comment When you zoom in with a lens on an SLR why does the lens go in then out?
@StanRogers, I've expanded my answer to reflect your comment.
Dec
26
revised When you zoom in with a lens on an SLR why does the lens go in then out?
Expanded answer
Dec
26
answered When you zoom in with a lens on an SLR why does the lens go in then out?
Dec
24
comment Why are only certain shutter speeds or apertures available?
From the linked Wikipedia article: Modern electronically-controlled interchangeable lenses, such as those from Canon and Sigma for SLR cameras, have f-stops specified internally in 1/8-stop increments, so the cameras' 1/3-stop settings are approximated by the nearest 1/8-stop setting in the lens. This holds for Sigma's lenses for the SA mount because the SA mount used in the Sigma SD15 and SD1 is electronically compatible with the Canon EF mount.