how to remove glass from a hoya filter

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robsoe

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I want to remove the glass from a hoya 40.5mm red filter, but it doesn't have a retaining ring. The glass seems to be glued to the metal. How to do this?
rob
 

John Koehrer

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Generally they're held in place by either a retaining ring or spring around the front circumference of the glass.
 

paul ron

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Is the filter stuck on your lens? If so... use a strap wrench or one of those rubber bottle openers to remove it from the lens.

Most filters are held in by a spring in the slot or a screw in retainer. If it's glued in.. try soaking it in thinners or acetone (nail polish remover) over night. It may ruin the paint.
 

Nicholas Lindan

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Sometimes there is a flange on the filter ring that is 'rolled over' to hold the glass in place. Hoya sometimes uses a spring wire that retains the lens. And sometimes the screw-in retaining ring doesn't have any notches in it and looks like part of the main filter ring - you either need to make a friction tool to remove it or drill a pair of holes to allow use of a spanner wrench.

You don't say if you want to save the glass, the ring or both.
 
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robsoe

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Sorry, I should have said earlier that I want to transplant the hoya glass to zodiak 30mm filter holder. The zodiak filter has a retaining ring, and it was easy to remove the glass. My 40.5mm hoya does not have a retaining ring. My 52mm hoyas do have retaining rings. Perhaps I need to cut the metal?
 
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