Author » Roger Cicala

I'm Roger and I am the founder of Lensrentals.com. Hailed as one of the optic nerds here, I enjoy shooting collimated light through 30X microscope objectives in my spare time. When I do take real pictures I like using something different: a Medium format, or Pentax K1, or a Sony RX1R.
Testing Color Casts in Lenses

Geek Articles

A Geek of Many Colors – Adventures in Spectrometry

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Please Note: This is a Geek Level 3 Article. It has no useful information about photography or videography. If you’re a lens geek, though, it’s kind of cool. And it will serve as our background and methods for upcoming articles.   Well . . . How did I get here?    David Byrne One of the nice things that happens at Olaf […]

Veydra Lens Testing MTF Sharpness

Equipment

Veydra Cine Mini Prime MTF Optical Bench Tests

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I have my preconceived notions, just like anyone else. A long while back the video techs told me we were stocking Veydra Primes in multiple focal lengths for m4/3 mounts. I just rolled my eyes and passed on by. Another boutique lens that would have poor resolution, ridiculous copy-to-copy variation, and a shelf-life-until-broken measured in weeks. Not interested. […]

40mm Lens MTF Testings

Geek Articles

Finally, Some More m4/3 MTF Testing: Are the 40s Fabulous?

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It took me a bit longer to get back to m4/3 testing than I expected, but we have an interesting set of primes to look at today, the ‘about 45mm’ group, which includes several 42.5mm and a couple of 45mm lenses. Please don’t get all worked up about that small difference in focal lengths; it’s […]

Teardowns and Disassembly

Taking Apart The Sony A7rIII – In Search of Better Weather Sealing

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Weather resistant – A term that consumers falsely define as ‘weatherproof’ and camera companies accurately define as ‘the warranty doesn’t cover water damage’.    The Cynic’s Photography Dictionary The Sony A7R III has been out for quite a while. Generally, it’s a superbly popular camera with excellent reviews. We were busy moving to a bigger office, […]

Sony MTF Testing 24-105mm

Geek Articles

MTF Tests of the Sony FE 24-105mm f/4 OSS

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Or ‘My Last 24mm-105mm Lens Test Ever’ Obviously, I have angered the Lens Testing Gods, since for the second post in a row I’m testing 24-105mm f/4 lens; this time the Sony 24-105mm f/4 OSS lens. As I’ve mentioned in the post on the Sigma 24-105mm f/4 many initials Art lens, while these are indispensable photographic […]

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