Use of DOF preview then removing lens - any chance of damaging aperture blades?

for what reason would you want to remove a lens and shoot thru it backwards!?

To shoot macro when you haven't got a macro lens... or maybe you're just bored and want to see what happens

I had heard about this before but was finally inspired to try it out last night.

Kinda hard to get great focus, but it does work fairly well. First I tried the nifty fifty, but it was a pain to have to set the aperture and then hold down buttons, etc. So I grabbed an old Konica 50mm f/1.7 lens I had sitting around, and gave that a shot since the f/stop is adjustable right on the lens. Gives me a little more flexibility, and the quality is about the same.

I havn't tried yet, but how would this technique work with say, a 100mm lens? I have an old FD-mount 100mm F4 sitting around that I'll try out tonight, if I can find it. Its around somewhere.

Thordic wrote in post #2205028
I havn't tried yet, but how would this technique work with say, a 100mm lens? I have an old FD-mount 100mm F4 sitting around that I'll try out tonight, if I can find it. Its around somewhere.

AFAIK shorter focal lengths give larger magnification when used in reverse position.

And, do not forget putting a reversed 50 (stopped down as per this thread) in front of a medium tele - say 200, or 70-200. Lotsa power but perhaps useable only in an indoor studio application.

I think for a reversed 50 in front of another lens I'd need to use a mount adapter of some sort. Especially if I use the Konica. It'd be heavy and bulky, and hard to get everything in focus and in-line.

Might have to look into one though, they can't be expesive. I know the reverse mounts are like $10 to mount the lens right to the camera.

Haha, well, I didn't try the 100mm lens, but then I thought "Hey, if 50mm gives good magnification, I wonder what 10mm would do?"

I gave it a shot. Its just about impossible to focus, and my DOF was ridiculously shallow, but I got the very tip of a toothpick to fill just about 40% of the frame. On a dime, I got about 15% of the area of a dime filling the frame.

Its a shame that I couldn't get anything to focus, it could make for some interesting shots.