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Old Mar 8, 2012, 9:11 AM   #1
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Default This looks like a bargain.

I recently purchased this 500mm f8 reflex lens made by LZOS during the cold war era. Clean optics, smooth focus ring, and some cosmetic flaws. The gentleman I bought it from said he had it for 30 years but never figured out how to use it. I took a chance on it for $30.00. It came with M42 threads and since I had a spare Sony to M42 adapter I was ready to shoot as soon as it arrived. I used my favorite test target( egg coddlers)as they are good for checking CA, sharpness, color purity and field flatness. The attached image was only cropped vertically. Distance was about 15 feet using incandescent light.
Attached Images
Sony A57 with 18-55 kit lens, Sony A200 and Sony H70
50mm f3.5 Minolta Maxxum macro
24mm f2.8 Minolta Maxxum
100-300mm Minolta Maxxum APO Zoom
70-300 Sony apo G SSM Zoom

Last edited by Streets; Mar 8, 2012 at 11:19 AM.
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Old Mar 8, 2012, 2:31 PM   #2
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Looks like a bargain at $30...!
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Old Mar 8, 2012, 3:39 PM   #3
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Yea... I wouldn't complain for that much money.

Mirror lenses do have some drawbacks. For example, contrast is lower because the design blocks the use of the middle of the frame with mirrors trying to make up for it, bokeh in out of focus backgrounds tends to stink (doughnut shaped), overall sharpness is usually lower compared to traditional lens designs (for the same reason you have lower contrast), and of course, no control over aperture.

But, unless you're comparing the same images to those taken with a more traditional lens design with the same focal length (which can cost a *lot* of money), then a mirror lens can be very nice (low cost, low size and weight).
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Old Mar 8, 2012, 5:56 PM   #4
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good buy
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