Question about filters for 2" and 1.25" eyepieces

[Astronut]

Simple question:

If I had two or three 1.25" eyepieces and one 2" eyepiece would I have to buy 2 sets of filters or is it possible to buy a set of 2" filters only and some sort of adaptor to fit them to the 1.25" eyepieces?

I fully realise that a 1.25" filter somehow fitted to a 2" eyepiece would not be a good idea but if a 2" filter can be somehow fitted to a 1.25" eyepiece then that would save some cash.

[GazOC]

If you have a refractor with a 2" diagonal and 1.25" EPs you have a choice.....

[John]

Another option is to use a 1.25-2 inch adaptor that is threaded for 2 inch filters (eg: the William Optics one). You can then attach your 2 inch filters to the adaptor when you are using 1.25 inch eyepieces and directly to the eyepiece when using 2 inch eyepieces.

John

[Astronut]

Forgot to mention it's for a newt so no diagonal.

Would the 2" focusser fitted to the tube be supplied already with some sort of adaptor for 1.25" eyepieces? I would have thought that a 2" focusser should be able to accept both eyepiece sizes but I don't know if the adaptor for 1.25" eyepieces (if there is one) would be threaded for filters.

For what it's worth, I'll probably be upgrading to a Moonlite focusser after I get the 'scope. Do these have a threaded (for filters) adaptor?

[GazOC]

I have the same problem AN, some (most?) 2" Newt focusers arn't threaded. It's best to stick to 1.25" IMHO.

[Andrew]

I've just got a Moonlite CR2 and the adapter is threaded for 2" filters - pity I only have 1.25" filters already!

[Astronut]

I've just got a Moonlite CR2 and the adapter is threaded for 2" filters - pity I only have 1.25" filters already!

Thanks Andrew Just the information I needed as I'll probably be upgrading to one of those focussers once I've lived with the 'scope for a bit. 2" filters for me then.

I must get round to ordering the 'scope asap - a few niggly things to sort out first though (car repairs, holiday flight bookings, etc)