1.25 filter to ccd...... Am I being daft?

[matt-c]

Hi everyone,

I'm trying to get my wide field rig up and running, so far I figured out how to attach my m42 lens to the 16hr but not how to use a filter.

I've seen the filter drawers and filter wheels but I'm thinking it's a bit excessive since I won't be taking my Ha filter off.

The filter I just received is the baader 7nm Ha 1.25 from Flo but I think I should have thought this through as I can't fathom how to get it in the setup I have.

It is early and I lack coffee so perhaps the solution will arise but has anyone had any luck with mounting a filter on a ccd with a lens?

Thanks

Matt.

[Tinker1947]

What is the lens thread size, is it male or female.....how much back focus is required rear of lens to CCD Sensor....

[matt-c]

The lens is m42x1 male fitting,

With 45.5 mm back focus.

[Tinker1947]

I would think the Baader 2" Adapter that came with my MPCC would screw into the CCD with a 1.25" filter thread inside,the bit between the Adapter and Lens would be a Baader Vari-Lock unfortunately they make a short one (20-29mm)  and a long one (29-46mm) there not cheap and while in my head it would work, being able to go to a shop and string it all together would make sure its not a waste of money (likely to be close to £100) FLO maybe able to help and there returns policy would help with the non waste of money.....

[matt-c]

Thanks for that mate.

I'll get in touch and hopefully they can recommend something.

[matt-c]

Actually do you think this will work?

http://www.teleskop-express.de/shop/product_info.php/info/p3564_Adaptor-from-T2-to-1-25--filter-thread.html

[riklaunim]

Nope, it converts threads. What you need (I use it with a lens) is Baader T2 extension with 1,25 filter thread. I have a set with their thraad inverter (extension is double t2 male and thraad is female t2 straight throug).

[matt-c]

Nope, it converts threads. What you need (I use it with a lens) is Baader T2 extension with 1,25 filter thread. I have a set with their thraad inverter (extension is double t2 male and thraad is female t2 straight throug).

That's brilliant thanks mate. I don't suppose you have a link for it do you? I can only seem to find extension pieces.

[riklaunim]

Those two:

http://www.teleskop-express.de/shop/product_info.php/info/p7514_Baader-continuous-male-T2-thread-with-1-25--Filterthread.html

http://www.teleskop-express.de/shop/product_info.php/info/p557_Baader-Adapter--37-continious-female-T2-thread.html

[Tinker1947]

Look ok, but hands on would be better, is it cheap enough if it no good.....

[matt-c]

Those two:

http://www.teleskop-express.de/shop/product_info.php/info/p7514_Baader-continuous-male-T2-thread-with-1-25--Filterthread.html

http://www.teleskop-express.de/shop/product_info.php/info/p557_Baader-Adapter--37-continious-female-T2-thread.html

That's great thanks a lot!

[matt-c]

I've messaged the seller to check but is it me or does this look very similar.

http://m.ebay.co.uk/itm/True-Technology-T2-to-T2-Male-Male-Gender-Changer-CCD-Imaging-Adapter-/291282085678?nav=WATCHING_ACTIVE

[riklaunim]

Double male, you will still need double female to screw things together.