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Category » Lenses and Optics

Stopping down Lens

Geek Articles

Things You Don’t Know About Stopping Down Your Lens

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Warning: This is a somewhat Geeky article. It has some real points that are useful for anyone who uses lenses, though, so I’ve tried to keep it mostly in English.  In imaging, there are a lot of topics where people over-generalize; there’s a general tendency for something to happen, but people become convinced that the […]

Sigma 35mm f/1.2 MTF Charts

Lenses and Optics

MTF Tests of the Sigma 35mm f/1.2 DG Art

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We just finished testing a couple of 35mm prime lenses and came away quite impressed. But it took a little longer to finish testing the one everyone had been asking about; the Sigma 35mm f/1.2 DG Art lens. I declared the Tamron 35mm f/1.4 SP the sharpest 35mm lens we had tested just a week […]

Focal Length Guide

Equipment

Helping Determine the Correct Focal Length for Photography & Videography

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Here at Lensrentals.com, we get asked a common question on the daily, which is something to the regards of “I’m shooting X, what do you think the best focal length(s) would be?” By definition, this is an impossible question to answer completely and would need a multitude of variables before we could actually give a […]

70-200mm f/4 MTF Charts

Just MTF Charts

Just the MTF Charts: 70-200mm f/4 Zoom Lenses

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We did the 70-200mm f/2.8 lens MTF charts last week, so let’s do the f/4 versions of the same range now. Sports shooters and portrait photographers need that f/2.8 aperture, but many of us, most of the time, are willing to trade that off for smaller-lighter-less expensive f/4 models. So, About f/4 Before we start, let me […]

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