T2, different sizes ???

[Ukastronomer]

See images

The tube is from my 120mm Esprit Refractor supposedly to attach a DSLR to, the problem is that the thread is what appears to be 47mm, the threads on T2 adapters are 42mm,

Does anyone know if they do a T2 Nikon with a 47mm

At the moment I am using the adjustable "Moonfish" one

Thanks

[Outcast]

Jeremy,

Not 100% sure but, from a bit of googling I think you might find your SW is 48mm thread (seems to be a standard across a lot of Astro things)

You should be able to get a 42mm (female) to 48mm (male) adapter ring to make what you have work for you..

[doug mc]

Also, thread pitch can vary. Baader T2 are 42mm diameter by .75mm. I have seen 42mm x 1.0mm pitch.

[bojan]

42x1mm is standard Pentax (but also zenit, praktica etc) thread.

[astro744]

A wide T-Ring is available with 48mm x 0.75mm pitch thread. See https://www.telescopeadapters.com/94-wide-48mm-format-t-rings

[Ukastronomer]

so 48mm, many thanks all

[Ukastronomer]

Thanks for the help, found one on Amazon and ordered it

[Ukastronomer]

Thank you

Thanks to your help I managed to get a step up, or is it down adaptor, much appreciated

Mind you I did order an additional T2 adaptor on Ebay from China for my Nikon, and receive a CANON :( :(

[PhilTas]

this link was posted to IIS recently -

https://agenaastro.com/astronomy-threads-explained.html

I've found it very informative.

cheers Phil

[Ukastronomer]

bookmarked on google chrome, thanks