okaro said:What you say makes no sense.
Sure.
okaro said:10 mm f/2.8 gives same angle of view and DoF as 16 mm f/4.5 on FF.
A 10mm lens on crop gives the same angle of view as a 16mm lens of FF - that's correct. But I have referred to the aperture, not focal lenght.
Please consider this video https://www.youtube.com/watch?v=xy5UTSmg2i0 to rethink what you've just said. There seems to be a lot of widespread confusion about that.
P.S.: A 10mm lens on a crop body won't change its focal lenght when you put it on a FF body (but the field of view will change - that is a big difference). The same is true for aperture - if the lens has f/2.8 on crop, it has f/2.8 on FF too - and the same DoF, if the distance to the subject is the same for both cameras (because the crop sensor is smaller than the FF sensor so it will give a different framing).
DoF has nothing to do with sensor size.
Upvote
0