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Re-purpose slide projector lens? Answered


Can a 100 to 200mm slide projector lens be used as an add on telephoto lens for my small digital camera?  They're cheaper than used camera lenses.

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OK, tried it and my configuration did not work all that well. I have a 2.5 inch f1.6 projector lens I got from surplushed.com and use a a wide field magnifier. I stuck it in front of my Fuji Finepix E570 and got a blurry mess (photo #1). The opposite way showed a little more macro promise, but not all that great (photo #2). DSLR was out due to the very short flange distance. In a projector, the film is nearly touching the back of the lens. Too short for mirror mechanisms to be in the way. Without some corrective lenses, the projection lens seems like a fail.

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Was hoping to get an answer, before I invest in a projector. In my area, they seem to be going for $20 to $50 ea.

Ok then I doubt it as alignment and quality of the optics well most likely render it useless, or at best a poor option.