A:Answer That depends entirely on what "EOS" camera you own.
If you own a DSLR, like an EOS Rebel T7, an EOS 90D, or 5D Mark II:
-This lens will not work, and there is no adapter that will make it work. You'll want an EF lens, or an EF-S lens if your camera uses a smaller APS-C sensor (like a Rebel or 90D)
If you own a crop-sensor (APS-C) mirrorless camera, like the EOS R10, R100, R50, or R7:
- this will work, but it will effectively be 1.5x more zoomed in (images will appear closer, but it will be harder to take wider-angle, more expansive photos) - i.e., this functions like a 150-600mm lens
If you own a full-frame mirrorless camera, like the EOS-R, RP, R8, or R6:
- This lens will work normally with no additional advisories.