Raynox DCR-250 technical DOF question.

I've been using a Raynox DCR-250 on a Canon 70-300IS lens(Canon T2i) and have a question about depth-of-field.Will the depth-of-field be the same at 1:1 magnification with this setup versus a Canon 60mm macro lens at 1:1 magnification(both setups at same f16 apertures)?

Thanks! Fred

Basically the answer is yes the DOF will be the same. DOF in macro just depends on the magnification and the aperture, not the lens system producing the magnification. I think there may be some minor differences caused by some lens combinations slightly changing the aperture but they really are rather minor.
Brian v.

Brian,
That's what I thought the answer would be.The reason I asked was to make sure that there was not a way to increase the DOF somewhat and still stay at apertures large enough to not cause too much softening from diffraction.But,as usual,there's no free lunch!

Thanks,Fred

Wider angle lens systems can give the appearance of more DOF vs longer lenses at the same magnification simply because the OOF areas are more recognisable and hence don't appear to quite as OOF.
Brian V.

LordV wrote in post #10404874
Wider angle lens systems can give the appearance of more DOF vs longer lenses at the same magnification simply because the OOF areas are more recognisable and hence don't appear to quite as OOF.
Brian V.

In that case("appearance of more DOF"),wouldn't the OOF areas being more OOF be preferable because it isolates the subject?

Also,in the case of wider angle lens systems(I assume you mean something like the 60mm Canon vs the 100mm Canon macro lenses),why is there not more ACTUAL DOF,along with some perspective change.....if at the same aperture?

Thanks!

frule wrote in post #10406878
In that case("appearance of more DOF"),wouldn't the OOF areas being more OOF be preferable because it isolates the subject?

Also,in the case of wider angle lens systems(I assume you mean something like the 60mm Canon vs the 100mm Canon macro lenses),why is there not more ACTUAL DOF,along with some perspective change.....if at the same aperture?

Thanks!

Yes longer focal length lenses are often used for their nicer bokeh.

Re shorter focal lengths I was actually thinking of even shorter lenses say 35mm or smaller - you certainly get a big perspective change but the focus point tends to be only just in front of the lens if shooting near 1:1
Brian v.