With the Tamron 20mm f2.8 Di III OSD, a photographer is getting a lot for their money, including distortion.

The Tamron 20mm f2.8 Di III OSD is part of the trio that the company announced last year. It’s lightweight, weather-sealed, and priced at only $349. This lens is pretty much an impulse buy. You’re not only getting Tamron’s level of fantastic build quality, but also great images that you’re going to love. Of course, this isn’t a lens for everyone: not every photographer needs a 20mm lens. But if you shoot landscapes or buildings, then then the Tamron 20mm f2.8 Di III OSD is a lens that can keep your overall travel pack very light. It’s got some issues with distortion, but that can be fixed.
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https://www.thephoblographer.com/2020/02/24/review-tamron-20mm-f2-8-di-iii-osd-one-of-the-best-wides-for-sony/