A:AnswerThis lens is not compatible with the EOS 90D. The 90D utilizes an EF mount while this lens is an RF mount. The RF mount is slightly larger so I believe it would be very difficult to adapt it.
Also the 90D is a crop sensor camera and this lens is a full frame lens. While it is possible to use full frame lens on crop sensor camera you would not be using the lens to its full capability.
A:AnswerNo. This is an RF series and works on the the mirror less full frame cameras. Your rebel needs an EF series lens. But definitely get yourself an ef 50 for the t7, it’s my favorite lens to use.
A:Answerthe newly develop RF50 1.8 is sharper than the old ef mount 50 1.8 . however with the technology this lens is a lot faster. If you dont want to expend the extra money and you already own the ef 50mm 1.8 and have the adapter it will work just fine in any mirrorless camera.
