How to mount a threaded lens filter onto a M12 lens?

Greenspan · Nov 15, 2018

I have a Mobius Maxi Actioncam with a M12 lens on the front. I would like to mount an IR Pass filter on front. I have something like this: http://a.co/d/58GXpqq which is threaded and meant for SLR lenses, I have a step down thread kit but that only goes down to 37mm. I measured the M12 lens and its outside diameter is around 17mm. I can't find any step down thread adapters that go down that low. I'm struggling to figure out how to mount a filter like this onto an M12 lens, any suggestions?

Nigel S · Nov 15, 2018

You can get a GoPro Hero 4 filter adaptor for various sizes of screw filter, I use 52mm, the smaller ones can have some vignetting with a wide angle lens: https://www.dpreview.com/forums/post/61926923

That fits the GoPro lens barrel. M12 lenses come in various widths, most smaller than a GoPro lens barrel, it is normally possible to find a bit of plastic pipe that will fill the gap, and maybe a bit of electrical insulation tape to tighten the fit.

Nigel S · Nov 15, 2018

Are you removing the IR cut filter from the lens before using those IR filters?

If you don't then they will be too dark for video...

Greenspan · Nov 15, 2018

Nigel S said:
You can get a GoPro Hero 4 filter adaptor for various sizes of screw filter, I use 52mm, the smaller ones can have some vignetting with a wide angle lens: https://www.dpreview.com/forums/post/61926923

That fits the GoPro lens barrel. M12 lenses come in various widths, most smaller than a GoPro lens barrel, it is normally possible to find a bit of plastic pipe that will fill the gap, and maybe a bit of electrical insulation tape to tighten the fit.

Thanks that was a good tip, I got one of these:

https://www.ebay.com/itm/Camera-37m...h=item23ac357b67:g:04wAAOSwHt1bvXXj:rk:4:pf:0

unfortunately crap like that takes forever to arrive from China via ship so I got one of these since they were both so cheap:

https://www.walmart.com/ip/Fotodiox...and-HERO4-Naked-Camera-Without-Case/200471078

I may need to glue a filter thread on the second one.They were pretty cheap so I'll give them both a shot.

Yeah, I already took out my IR blocking filter, everything looks purple now; I tested it out just hand holding a IR950nm filter and it works pretty well.

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How to mount a threaded lens filter onto a M12 lens?

Greenspan

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Nigel S

Nigel S

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Nigel S

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Greenspan

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