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Lens Rentals An Inside Look at the Rokinon 50mm AF FE Autofocus Lens | Lensrentals Blog

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 […]

How To's

Why You Can’t Optically Test Your Lens with Autofocus

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By far the most common email and PM I get basically says, “I think my lens is optically out of sorts. What do you think?” The second most common is, “So what’s the best way to optically test my lens without a ton of equipment.” Years ago I wrote an overly long post about testing […]

Technical Discussions

Autofocus Reality Part 4: Nikon Full Frame

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I started this series to simply demonstrate a well-known fact; that contrast detection autofocus in Live View was more accurate than standard Phase Detection autofocus for still subjects. It ended up being a bit more than I’d bargained for just with the Canon cameras. After that series was done, I promised several people that I […]

Lenses and Optics

The Effect of a Decentered Lens on Autofocus

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As some of you know, I’ve been testing a large number of Nikon cameras and lenses as part of the Autofocus Reality series. (Nikon full frame results will be up in a day or so.) I noticed an abnormality in one copy of a lens we were testing that some of you might find interesting.

Technical Discussions

Autofocus Reality Part 3B: Canon Cameras

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Some days it’s good to be a geeky gear-head. This is one of them because a) I finished testing autofocus on all of the Canon camera bodies we had, b) I actually found out some interesting stuff, and c) I got worked up about camera marketers while doing it, so I have my next post […]

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