Can anyone tell me what size this thread is?

[tooth_dr]

It’s on the back of a T-adapter. It is 47.5mm. The smaller threaded bit attached to the MPCC  

i want to make an adapter to screw 1.25” filters in here. 

 

Thanks!

 

[Merlin66]

Hmmm

Is it actually a usable thread? or a rough thread used as internal baffles.

 

[Davey-T]

48mm is a standard astro thread.

Dave

[Alien 13]

As above its purely cosmetic designed to reduce light scatter/reflection..

Alan

[MarsG76]

I used to think that it was a 2" filter thread but no, its not.... I got a plastic adapter from Mogg Adapters and lathed off the bigger part to fit snugly into the DSLR ring bayonet mount... than screwed the 1.25" filter into the middle...when I get home, I'll take a few pictures and post here... that solution works like a charm.

 

[Stub Mandrel]

13 minutes ago, Alien 13 said:

As above its purely cosmetic designed to reduce light scatter/reflection..

Alan

WHS.

If it was me I would 3D print an adaptor that was a push fit.

[MarsG76]

40 minutes ago, Alien 13 said:

As above its purely cosmetic designed to reduce light scatter/reflection..

Alan

That makes sense.....

 

[tooth_dr]

Thanks all, on closer inspection it does not appear to be a proper thread at all, saved me wasting money.

 

As luck would have it I'm booked on a 3-d printing demo tomorrow night, they said they will be able to do demos for us.  I wonder could I make up a push fit adapter drawing on the computer and bring it along?

[Davey-T]

17 hours ago, MarsG76 said:

 I got a plastic adapter from Mogg Adapters and lathed off the bigger part to fit snugly into the DSLR ring bayonet mount... than screwed the 1.25" filter into the middle..

Is Mr Mogg still going ? I've got one of his Delrin adapters.

Dave

[tooth_dr]

Would it be better cut from a sheet or 3-D printed, I could do either.

[tooth_dr]

First attempt 

 

[Merlin66]

Looking good...

I'd reverse the plate to bring the filter into the front T thread section and away from any possible interference inside the camera body.

 

[tooth_dr]

6 hours ago, Merlin66 said:

Looking good...

I'd reverse the plate to bring the filter into the front T thread section and away from any possible interference inside the camera body.

 

Thanks! I’ve measured it so the innermost point of the metal holder on the 1.25” housing sits in the same plane as my clip filter  but in fact I can probably protrude another 1mm further forward into the camera.  I obviously want it was close as possible to the sensor.  The filter itself is a further few mm back 

[Stub Mandrel]

There are also clip filter to 1.25" adaptors on Thingiverse.

[tooth_dr]

36 minutes ago, Stub Mandrel said:

There are also clip filter to 1.25" adaptors on Thingiverse.

https://www.thingiverse.com/thing:2654090

 

Brilliant - didnt know such websites existed!

[tooth_dr]

Jaysus and someone has made a case for the same board level camera I have!!

 

https://www.thingiverse.com/thing:378049