Originally posted by Pål Jensen It isn't confusing:
a) For lenses with the same DOF wide open APS will have a larger range of DOF. This is because in real life the APS lens will have one stop faster max aperture but both lenses will typically have the same minimum aperture.
I am honestly confused, and not following. Please give me an example of the above using existing lenses.
Quote: In addition the APS lens will have closer minumum focusing distance.
Why? MFD is completely lens-design dependent, has nothing to do with format.
Quote: b) At the same exposure you'll get one stop faster shutterspeed with APS for the same DOF. This is because you shoot at a wider aperture.
Only if you want to. If you want the same shutter speeds and are OK with (or prefer) the stop less DOF - and one stop less noise - leave the aperture where it is and viola. If you want to have the same shutter speed
and same DOF, simply bump ISO that one stop, and viola II. You won't see more noise, because you'll have that available SNR overhead with FF, assuming sensor generations are close.
Here is a great reference to Equivalence you should bookmark.. Quote: Add this to the up to four stops gain with SR in every lens then you get a total of five stop advantage at best compared to a D600 without stabilization.
Your shutter speed stop is falsly derived, see above, and the biggest claim ever for IBIS is 4 stops, but nearly every place that tested said 3 or 2 is more likely. There are no 5 stops to be had. (You don't need 5 stops to make it a neat feature, 2 stops is enough.)
EDIT: OK, enough with the FF talk in a K-3 forum, I promise
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Last edited by jsherman999; 10-31-2013 at 09:00 PM.