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Category » Lenses and Optics

Equipment

Testing the Best Ultra-Wide Lenses for the Perseids Meteor Shower

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Meteor showers can be some of the most exciting celestial events to shoot, but they can also be quite the challenge to get a good meteor photo. With about ten years of practicing astrophotography and timelapse, one of the best lessons I’ve learned with increasing chances of a good meteor shot is: go wider, a […]

Lenses and Optics

Sony FE 20mm f/1.8 G Optical Tests

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I haven’t published much optical testing in the last year for many reasons; some obvious, some not. But published or not, we still test things, and occasionally something comes up that I think I need to write up. The Sony FE 20mm f/1.8 G is one of those things. As wide-angle primes go, it’s reasonably priced […]

Equipment

MTF Tests of the Tamron 17-28mm and 28-75mm f/2.8 Di III RXD Lenses

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Tamron has a nice set of three f/2.8 zooms for Sony E mount cameras. Today I’m putting out MTF results for the 17-28mm f/2.8 Di III RXD and the 28-75mm f/2.8 Di III RXD. They offer a reasonably priced alternative to Sony-branded lenses, and Tamron has been making good products lately. I’ll admit to a […]

24-70mm Field Curvature Article

Geek Articles

Practical Use of Field Curvature: 24-70mm Zooms

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We’ve done a pretty good introduction to the field curvatures of 24mm, 35mm, 50mm, and 85mm prime lenses. We made a little bit of comparison with bargain primes and zoom lenses at 35mm. This post is going to assume you are familiar with those previous posts. (Yes, I know the reality is most people read […]

MTF Charts for 24mm Lenses

Equipment

Practical Use of Field Curvature: Wide and Telephoto Primes

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We introduced evaluating field curvature with 35mm f/1.4 lenses, then looked at how those differ from slower 35mm primes and zooms at the same focal lengths. Then we got into some practical stuff, showing how field curvature gives you useful information for 50mm lenses. Today we’re going to look at 24mm and 85mm prime lenses for a couple of […]

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