K&F Concept 37mm UV Lens Filter - 28 Multi-Layer Coatings HD MCUV Scratch-Resistant Ultraviolet Protection Filters for DSLR Camera Lens

SKU: KF01.979

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In addition to lens protection I specially like the K&F design with CNC precision-curved anti-slip teeth on the rim. If your Tamron lens cap is all smooth and not the centre-pinch snap on type then I don't think it will fit because of the corrugated teeth. 
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If it is the correct size. I have a K&F on my 70-200mm f4 L IS USM (67mm)