Not just 'no' but heck no! Get a cheap-o ring and get busy with that FM2. I have a couple Heliopan rings because they were the only ones available in hard-to-find sizes while all other rings of mine are from who-knows-where. Haven't been able to discern a difference.Do I really need to spend $47.50 (Heliopan) for a step up ring?
Just don't get the plastic ones - the two I have had both broke quickly, were difficult to thread properly and became "wiggly" on a hot day (the plastic was melting). Stick with metal.
They make plastic step-up rings? I have not seen any but I am not that surprised.
I did recently see a plastic tripod. It weighed next to nothing. It also could hold next to nothing!
It's a threaded metal ring, for crying out loud. Putting a brand on it is just a waste of money.
If it's brass instead of aluminium then it's less likely to seize, but you just don't make a habit of leaving the Al one on your camera.
That's excellent advice.I would advise not getting too gorilla-like in tightening such rings, just enough they don't wiggle or wobble.
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