07-24-2020 02:24 PM
I picked up a used T5 with the 18-55 mm kit lens and also the 75-300 mm. I can't attach the 75-300mm lens to the camera for some reason. I place the lens into the opening and match the red dots for the EF lens. The issue is, I can't twist to lock it into place. I've applied some force to it thinking maybe it just needs an extra push but I am also scared to damage the lens. Does it need just a little extra force or any ways to identify and fix what could be the issue? Maybe the issue is not the lens and is the body?
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07-24-2020 02:27 PM - edited 07-24-2020 02:28 PM
It should just work. I have no problems with my EF lenses. I can't tell the difference between an EF and EF-S lens. Before applying more force look at the lens and mount carefully. While there are features on EF-S lenses to keep them from mounting on an EF mount, it does not work the other way.
07-24-2020 02:36 PM
07-24-2020 04:51 PM
If other lenses work with the body your 75-300 may have slight mount damage that isn't easy to spot.
Mount tolerances are so tight that a very small tweak will make a poor fit.
07-25-2020 10:47 AM
"Does it need just a little extra force or any ways to identify and fix what could be the issue?"
It needs very little force, exactly like mounting your 18-55. I assume it mounts OK? The mount may be broken but it would tale a significant blow to bend it. Enough that the lens itself would probably be damaged too. This lens is not a good candidate for repair either. But a call to Canon will comfirm that or not. 1 (800) 652-2666
07-25-2020 11:25 AM