As a matter of fact, it is interesting that EFM 32mm is $479 while RF 35mm is $499. EFM is brighter, but RF has IS. I wonder how much RF 50mm 1.4 would be if it provided the same quality as EFM 32mm. lumenite's gear list: Canon EOS-1D Canon EOS M Canon EOS M5 Canon EF 28mm f/1.8 USM Canon EF 50mm F1.4 USM +7 more. The 1.4 is clearly sharper from f2 and beyond. There is no 1.8 from the 1.4 to make a direct comparison, but in all the ones you can the 1.4 is sharper. The CA is slightly lower in the RF 1.8. Also, the 5Dsr which is testing the ef 1.4 is 50mp. The R5 is 45, so the 1.4 looks sharper even on a higher mp sensor. Options. 06-10-2016 07:02 AM. EF-S is the lens mount description. EF-S lenses are designed to only go on crop sensor versions of Canon DSLRs. IS means the lens has Image Stabilization. You will find some lenses with IS and some without. Most lens will have USM or STM next in the name. USM means Ultrasonic focusing motor and STM means Step The Canon EF-S lens mount is a derivative of the EF lens mount created for some Canon digital single-lens reflex cameras with APS-C sized image sensors. It was released in 2003. Cameras with the EF-S mount are backward compatible with the EF lenses and, as such, have a flange focal distance of 44.0 mm. The 55-200 STM is noticeably smaller than the EF-S 55-250 STM lens. The EF-S lens is reasonably compact and light, but is an inch longer (4.38”/111.2mm), thicker around, and weighs a third more (375g). To use it on the M3, though, one must also add another inch in length for the EF Adapter along with another 110g of weight. No tripod foot. The Canon Mount Adapter EF-EOS R ($99.99) is, at its core, a very basic accessory. It has one job—to make Canon EF and EF-S SLR lenses perform just the same on the EOS R They're both 50mm lenses, so they should give you the same exact picture. (In practice, 50mm is kind of approximate, so the pictures may vary slightly.) The difference between those lenses is the size of the image they produce; i.e. the size of sensor they cover. But they will both cover the APS-C 1 Answer. The short answer to your question is yes, an EF lens can be used on a crop-sensor (EF-S) Canon camera. The longer answer is that EF-S lenses are designed for crop-sensor lenses, the 's' denotes a smaller image circle, but it's otherwise a compatible mount. So, lenses designed for full frame (EF) will also work on your camera. .

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