Category Comparing Rangefinder and SLR 50mm Lenses. (Version 0.7) | Lensrentals Blog

Lenses and Optics

Comparing Rangefinder and SLR 50mm Lenses. (Version 0.7)

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Well before our Imagemaster optical bench was delivered, I knew what I wanted to do first: compare some Leica lenses with the best SLR lenses on a level playing. I did one comparison involving Leica lenses a long time ago, but Leica lenses are difficult to test in our Imatest lab. It’s nothing to do with Imatest or the lenses; simply […]

Lenses and Optics

MTF – The English Translation

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This post contains absolutely no mathematics. Explaining MTF without math is sort of like doing a high-wire act without a net. It’s dangerous, but for any number of reasons is more likely to keep the audience interested. Why Am I Doing This Again? I wrote an article on reading MTF charts several years ago. It […]

Lenses and Optics

A Look at Stopping Down

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  We all know that aberrations affect points of light off-center, making them blurred. We all know that some aberrations are worse the farther away from center we go. And we know that some aberrations are improved when we reduce the aperture. Some of us even know the various rules-of-thumb for what makes an aberration […]

Equipment

OLAF’s Lens Art

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This is a Geek Article, with very little practical information. But there are pretty pictures that non-Geeks might like. (Not the construction pictures, the ones further down.) First, I should explain why I haven’t posted much lately. Lensrentals was able to expand into some adjacent space, which was desperately needed. But the testing and repair […]

Equipment

Roger’s New Toy Needs a Name

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First and foremost, if you aren’t at least a little Geeky, this post is not for you. Unless you’re one of those people who thinks ‘just take some pictures, dammit’ when I write some article about resolution testing.  In that case, you might like this article because we’re taking pictures to test lenses. Sort of. […]

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