Originally posted by jsherman999 Wrong.
Misleading, wrong.
??? Not sure what you mean here. But I can't see any way what you're tying to say could be accurate.
If the "Most of this is wrong" statement applied to
Your post, then you were right!
EDIT. Class A beat me to the punch line *&*((*&0
.
Sorry to pollute this thread with facts. The endless repeating of FF myths won't make them true. The advantage with larger formats is better image quality all else equal (and larger viewfinders). Thats about it...
The more control over DOF with FF is a myth with no basis in reality. Thinner DOF does not equal more control; just thinner DOF (and it only applies to wide open compared to APS). APS give more control over DOF as control over DOF defines the range of DOF you can possibly get from you camera/lens combination and APS give indeed a larger range due to two factors; the lenses (FF and APS) have the same minimum aperture (something they usually have in practice) and closer close focusing distance with APS with comparable lenses giving the same angle of view on their respective formats.
The reason for tilt/shift on large format is to get control over DOF. Thats right, the ultra large format have so little control over DOF due to its size that movements in relation to the film plane have to be introduced. Again thin DOF is not control.
FF willl give about one stop thinner DOF wide open but trade control over DOF for this "feature" and one stop slower shutter speed at the same DOF and ISO . As the number of images that display thinner DOF than is possible with APS is so small that is not practical to measure in percentages (not to mention the number of sucessful images), it is a feature for the particulary interested.
Regarding AF: What I mean is that it is sucessively more difficult to make accurate AF in larger formats. This is also a fact and also a function of DOF. It is much simpler to make precise (and fast) AF with eg. the Q than the 645D. In fact, Pentax had to tweak their APS AF system when implementing it in the 645D for this reason. Not only that, longer focal lenghts for the same angle of view on the larger formats means that the focus throw also is longer meaning more physical work in larger format to focus. It is faster to spin a helicoid short distance than a long one.
To take an extreme example if the format is small enougn "AF" can be instant, as fast as the speed of light. Ie. fixed focus.