Halfmoon
Senior Member
Shallow DOF is useful in isolating subject from cluttered background and/or foreground...However, like I said, some people don't like it very much: they want BOTH eyes and BOTH ears of subject to be in perfect focus EVERY time...
DOF of f/2.8 on FF can be shallow or deep depending on focal length and subject distance.
On another note, this EXIF analysis of the best Reuters photos in 2012, shows that 45.7% of street/journalistic photos are taken at f/2.8 or smaller aperture settings on FF cameras. This substantiates my view that APS-C and m43 are actually more than enough for most people since f/2.8 DOF can be easily achieved with f/1.4 and f/1.8 lenses on m43 and APS-C platforms respectively. As such, there is really no compelling reason for anyone to move into FF territory unless one desires super shallow DOF.
It is a preference and individual style on the DOF......
But it it is a portraits, I think the DOF cannot be too shallow... good to isolate the background, but not to blur the subject.......... some people use the eyes and ears as the standard (that this 2 points much be sharp)....
I was thinking that a FF f2.8 is more than enough for most people too..... for APSC, you need to invest in primes.... and most f1.8 and below primes are costly....