Need help with choosing filter size!!!

[JPDucky]

So I have been browsing the web for literally hours today trying to find out what size filter I will need for mounting a dslr onto the back of this http://www.telescopes.com/telescope-accessories/photographic/celestrondslrcameraattachmentkitforschmidtcassegraintelescopes.cfm

I know I want an ha, oiii, and sii filters, but I have absolutely no idea what size filter I will need. Any help is appreciated. This will all be going onto the back of an avx 8" sct. Thanks!

[JPDucky]

Anyone?

[RichieP]

Give people a chance. Many of us have day jobs you know!

Sent from my GT-I9305 using Tapatalk

[JPDucky]

Sorry! It's just that black Friday is coming up and I'm trying to figure out what to do!

[JPDucky]

Is this under the right topic?

[m37]

Not experienced with SCTs but this doesn't look like it has anywhere to attach filters e.g. internal threads. If you want to use 3 narrowband filters have you considered a filter wheel? They usually have T thread either side and you often get adaptors with them which would allow you to mount your DSLR's female T Thread to the filter wheel. They make changing filters much easier. You can get them in 2" or 1.25". I went for 1.25" as the filters are much, much cheaper than 2".

Good luck with narrowband on a DSLR, I'm embarking on it at the moment. You need very long exposures to get Ha through the pesky bayer matrix and in-body filters, you only pick up a fraction of the light (unless your DSLR is modded)!!! Just managed to get a glimpse of the rosette nebula in Ha but it required 10 minute exposures before it looked even remotely good.

cheers and good luck with it.

[JPDucky]

I'm new to this so can anybody tell me exactly what I need? I like the filter wheel idea, but I have no idea as to what connectors and adapters I would need to go along with it.