Re: loose Stepping Rings + solution
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scottfrey wrote:
All of the Step-up rings came from China and none would seat properly on the threads of the lens. They'd just keep turning and turning without locking down hard on the lens. We have a theory that the same cutting dies were used for these step rings, regardless of the sellers. Additionally I had mounted 5 different filters directly on the lens without any issues
I just had mine replaced under warranty (it stopped locking focus). FYI, they do not repair this lens, only replace it with a “new or refurbished item” (and there is no way to tell which). The replacement exhibits the exact same behavior with the step up rings. I even sent along my Fotodiox step-up ring. I was told that the service center did not support non-canon accessories and I should buy the one canon does not sell.
So, I think it’s fair to say that all of them will have this issue with step up rings.
The problem does not appear to be the lens threading because I've tried no less than 5 different 43mm filters on this lens, none of which had any problem locking down. The only problem appears to be with stepping-rings. All of which were presumably cut by the same parent-die - or were copied by one that was.
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You know what my solution was for Stepping Rings? Mount them straight into a 43mm Filter on the front of the lens. That's exactly what I did below when shooting Comet 46P/Wirtanen last weekend and needed to mount my 77mm NiSi Natural Night Filter onto my EF-M 32mm f/1.4 STM lens. It locked down tight too.
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Solution for loose stepping rings? Stick a 43mm filter on the camera's filter ring mount... and then mount the ring directly to the filter instead. You ought to be using a very clean UV filter to begin with and that means 96% to 99.7% light transmission.
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77mm NiSi filter + stepping rings fitted to the 43mm Hoya filter that was on the lens.
EOS M6 + EF-M 32mm f/1.4 STM + NiSi Natural Night Filter
Taken with EOS M6 + EF-M 32mm f/1.4 STM + NiSi Natural Night Filter
Taken with EOS M6 + EF-M 32mm f/1.4 STM + NiSi Natural Night Filter
(stacked from 8 images)