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.
Lensrentals.com, 2016

Geek Articles

An Inside Look at the Rokinon 50mm AF FE Autofocus Lens

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I have had a love-hate relationship with Samyang / Rokinon lenses for a long time now. (We carry the Rokinon brand, because the distributor, Elite Brands offers repair services in the U. S.) Rokinon lenses provide good optics at an incredible price. They aren’t ‘built like a tank’ and aren’t going to take a lot […]

Lensrentals.com, 2016

Geek Articles

Taking Apart the New Nikon 105mm f/1.4E ED AF-S

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We recently tested the Nikon 105mm f/1.4E ED AF-S lens and were mightily impressed. Optically it was better than I’d ever expected. We had idly talked about doing a teardown when stock allowed, but we got an unexpected opportunity yesterday: one of our week-old copies had some significant dust in both the front and rear lens […]

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Equipment

Canon 24-105 f/4 IS Mark II MTF Results

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I like to start articles by stating my expectations, because, like everyone, my expectations going in color my opinion after seeing the results. Given Canon’s recent series of home-run lens upgrades, I expected the Canon EF 24-105mm f/4 IS II would be a superb lens. I was particularly expecting improvement at 105mm, which was the […]

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Lenses and Optics

Nikon 70-200mm f/2.8E FL ED AF-S VR MTF Tests

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Well, we all want to call it the 70-200 VR III, since it replaces the Nikon 70-200 f/2.8G AF-S VR II.  But the new lens is officially the 70-200mm f/2.8E FL ED AF-S VR. It is most definitely a different lens; it’s 22 elements include one fluorite, one high-refractive, and six ED elements, along with new […]

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Geek Articles

Testing NASA Optical Lenses – How We Measure Sharpness and Accuracy

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We’ve spent about 5 years developing and repurposing various types of optical testing for use testing photo and video lenses. It’s been a long process with lots of learning (learning is when you find out you’re doing it wrong), and improvements along the way. We’re pretty close to finished; our methods are fully developed. Sure there […]

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