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Tamron warns its 20mm, 24mm and 35mm F2.8 primes have AF issues with Sony a7 IV cameras: Digital Photography Review
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Amazon.com : Tamron - 20mm F/2.8 DI III OSD 1/2 - Lens for Sony E Mount - Ultra-Wide Angle - Macro 1:2 - Light and Compact - Ideal for Everyday Photography- F050SF Black : Electronics
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Tamron 20mm f2.8 + 24mm f2.8 + 35mm f2.8 Lens Review + Example Images — JULIA TROTTI | Photography Tutorials + Camera and Lens Reviews
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