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What's the thread on a 37mm filter?

Started Apr 22, 2019 | Discussions
Lautman Forum Member • Posts: 55
What's the thread on a 37mm filter?

I have a 37mm ND filter I need to tap a hole for to attach (it’s not going directly on the camera, which has no ability to accept threaded filters). Does anybody know what the standard thread is for these things? I’ve e-mailed the manufacturer (Gobe), but don’t know if/when they’ll respond.  Thanks!

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petrochemist Veteran Member • Posts: 3,619
Re: What's the thread on a 37mm filter?

The standard 37mm filter thread is M37x0.75, it's possible some enlarger lenses where made with a 0.5 pitch as for some reason they seem to avoid using standard photographic threads. M37.5 & m30 where used in both pitches...

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Gato Amarillo Veteran Member • Posts: 9,340
Re: What's the thread on a 37mm filter?

I don't know exactly what you're doing, but it might be simpler to buy an adapter ring -- either a step-up or step-down ring -- and work it into your plans. That way you don't have to cut the threads.

Gato

OP Lautman Forum Member • Posts: 55
Re: What's the thread on a 37mm filter?

Wouldn't I still need to cut threads for the adapter ring?  I confirmed the filter's thread pitch is .75mm, btw.

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Panasonic GH5
Gato Amarillo Veteran Member • Posts: 9,340
Re: What's the thread on a 37mm filter?

Lautman wrote:

Wouldn't I still need to cut threads for the adapter ring? I confirmed the filter's thread pitch is .75mm, btw.

I was thinking it might be possible to attach the adapter without threading anything -- possibly with epoxy. For some of my projects I have used J-B Weld.

Don't know if it could work for what you have in mind, but thought I'd offer the suggestion.

Gato

OP Lautman Forum Member • Posts: 55
Re: What's the thread on a 37mm filter?

Aah, I see what you mean.  Great idea.  Just ordered one.  Thanks!

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