Filter for Canon ltm 50mm lens (loose glass)

[punkzter]

I just received a filter for a Canon ltm 50mm lens. The filter (UV) is in good shape, but the glass is loose and moves a bit. I don't think it's in danger of falling out. Is this common with older filters? It was supposed to be in Mint condition...and I'm not sure if I think that applies or not.

 

[__Brian]

Does the filter have a retaining ring? If so- sometimes they loosen up and need to be tightened.

I've seen filters with glass held in with flat springs, "pinched metal rims", stamped into place, and retaining rings.,

 

[Patrick Robert James]

I have a couple 48mm Canon filters and they both have loose glass whatever that is worth to you.

 

[AgX]

Does the filter have a retaining ring? If so- sometimes they loosen up and need to be tightened.

There a two kinds of retaining rings:

-) screwed in
-) clipped in

A clipped retaining ring one may take out and twist it out of its plane, thus giving it a spring effect against the glass for tighter fit.


To the OP's question:
There will be no technichal problem with a loose filter. Neither for lateral shift of the glass, nor for swing against the optical axis.

 

[Sirius Glass]

Does the filter have a retaining ring? If so- sometimes they loosen up and need to be tightened.

I've seen filters with glass held in with flat springs, "pinched metal rims", stamped into place, and retaining rings.,

Yes, follow this advice.

 

[Kodachromeguy]

Rolleiflex Bay II and Bay III filters are also a bit loose. Years ago, I read that they were made like this to eliminate stress flexing, although I am a bit dubious of this happening.

 

[Ko.Fe.]

Canon LTM is 40. Try to find 40 to 40.5 step up ring and get modern, quality filters for normal price. The old 40mm filters are junk.

 

[gorbas]

Canon ltm 50mm lens

Canon original hood for 50mm RF lens had space for Series VI filters. Why on earth did they decide to make their RF lenses fitted with 40mm filters?? Just to have their own size?? Leica was 39mm, Zeiss Contax 40.5mm.

 

[__Brian]

The 50/1.4 uses 48mm filters, 50/1.2 uses 55mm filters, 50/0.95 uses 72mm filters.

The 50/2, 50/1.9, 50/1.8, 50/2.8 use 40mm filters. I forget what the 50/3.5 uses.

The 40mm Walz filters are coated, at least the ones I have. The 40mm Walz vented hood is very good- I have 2 of them.

 

[gorbas]

I'm talking about Canon S-42 hood for 50/1.8 - Series VI. Some other, bigger Canon hoods from the same vintage also had series VII or VIII "slots" in them. Canon 2.8/28mm is also 40mm.

 

[punkzter]

I have a couple 48mm Canon filters and they both have loose glass whatever that is worth to you.

Cool. Thanks