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.
Xeen MTF Tests

Just MTF Charts

Just the Cinema Lens MTF Charts: Xeen and Schneider

By

We’ve completed the MTF postings for all of the photo prime lenses. Now we’re going to start with the Cinema primes. For a lot of those that also have a photo version, the optics should be identical. That’s not always the case, however. Plus, the people interested in Cinema lenses aren’t usually the ones interested […]

History of Photography

How Potatoes and Gelatin Created Color Photography

By

Long ago, I wrote articles about the glory days of photography. The days when any photographer worth a damn dabbled in chemical explosives or Bitumen of Judea and spun off side gigs like Lionel toy trains or fashion clothing. Back then your competition didn’t dabble in stealing your photographs, they stole your patents and drank your milkshake. One of […]

Just MTF Charts

Just the MTF Charts: Micro 4/3 Lenses

By

Not a lot to say specifically about the m4/3 lenses except please don’t ask why your favorite isn’t on here; this is all I’ve got. Some of the newer m4/3 have linear electronic focusing which can’t be tested on the bench without a specialized, expensive mount and we don’t have one. Even for the ones […]

Just MTF Charts

Just MTF Charts: Perspective Control Lenses

By

I had a little hesitation about whether we should post these. Most people considering a tilt-shift aren’t thinking ‘I want the absolute best sharpness.” Plus what we show is the MTF without the lens tilted or shifted, both of which will affect the resolution to some degree, but you’re probably using them tilted and shifted. […]

Equipment

Just MTF Charts: Rokinon / Samyang Lenses

By

I’m going to add some qualifications to the Rokinon / Samyang MTF post. First, the results are a mixture of both brands (which are identical except for the label). Lensrentals stocks mostly Rokinon labeled because of better (the bar is low here) service in the U.S., so the website calls them Rokinon. Our software calls them Samyang because Samyang Optics […]

Follow on Feedly