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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 : Sony a7 III Mirrorless Camera (ILCE7M3/B) + Tamron 28-200mm Lens + 64GB Card + Filter Kit + Wide Angle Lens + Color Filter Kit + Lens Hood + Bag +
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