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New Contributor
Posts: 1
Registered: ‎01-31-2021

RF 50mm 1.8 STM mount seems extra tight

Wondering if it's an issue with my new lens or common with this lens. All my other RF lenses have a smooth locking mechanism when mounting to my R5. The 50mm lens takes a bit more effort to get it to lock, it's really tight. Is this an issue? I don't want to chance damaging my R5 mount ring. 

 

jeff

 

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Posts: 13,712
Registered: ‎12-07-2012

Re: RF 50mm 1.8 STM mount seems extra tight

I don't have the adapter or 50mm f1.8 but I suspect it should mount just like any other EF lens. I suppose there could be at some point where tolerance stacking comes in to play, however.

EB
EOS 1DX and 1D Mk IV and several lenses!
Frequent Contributor
Posts: 112
Registered: ‎11-14-2018

Re: RF 50mm 1.8 STM mount seems extra tight

I believe the op is refering to an RF lens.  I don't think it should be any tighter than your other RF lenses, however as 

Frequent Contributor
Posts: 47
Registered: ‎11-28-2020

Re: RF 50mm 1.8 STM mount seems extra tight

I just got one and it felt a little tight also, but not so much as to be worrying. It feels tight to twist on compared to the RF 28-70, but I wonder if that is something to do with how small and light it is. Probably just feeling the mechanism more with the little RF 50 compared to the L glass I have.

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