Before the rush

Before the rush
by evan-pak

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From the "Recommended For" tab of the Tamron web page for that lens: Tamron Di-II lenses are engineered expressly for digital SLR cameras with image sensors commonly referred to as APS-C, measuring approximately 24mm x 16mm. This means the image circle is sized for the smaller APS-C sensor, and is too small for a full-frame camera like the 6D. This is ...


That lens is designed to be used for APS-C sized sensors with the Canon EF-S mount. It projects a smaller image circle than is needed to cover the larger full frame sensor of your 6D. Most third party APS-C lenses do not include the additional tab that prevents them from being mounted on a FF Canon camera that uses the EF mount. That is why you can even ...

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