Originally posted by creampuff I can understand the change in the equivalent angle of view but aperture?
Not the aperture as such but DOF provided by the FL/f stop combination. f2.8 lens on APSC will not yield the same DOF as the f2.8 on FF.
Therefore to get the same image from APSC sensor as compared to FF you have to change both focal length (roughly 1.5x) and f stop (roughly 1 stop difference).
For example shot taken on FF with 43ltd @f2 would require 28/1.4 lens to achieve the same framing/magnification/DOF from the same shooting position..
my 2p
Originally posted by jgredline Yep, I held out for a long time, but broke down a few weeks ago and bought the FA*24F/2.0. It is a really nice lens. 24mm is my most used focal length. I have 7 24mm lenses. Of course Like you, I use manual focus so it is easy...
For street, I prefer deep DOF. I am not a huge fan of shallow DOF though in some cases it does work to isolate the subject. That of course is just me. The nice thing about the DA21 which is my next used focal length, is that there is much more room for error as is with the Sigma 10-20..28mm works ok as well, but that is pretty much the limit for me.
Javier, now you are just teasing! I have just sold K24/2.8 because it was MF only. My main intent behind this lens was indoors when 31 is not wide enough. It turned out that I got many more keepers with 31 (even if I had to back a step or two) than trying to MF the 24. The focus throw just wasn't big enough, and I for one like shallow DOF... so the 24mm FA* makes sense to me... Now I just need to gather the funds
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