Dslr and filters.

[The_PSY3NTIST]

Hi all

Just wondering how everyone uses filters while they are imaging with a dslr? I use the 500d with the t adaptor straight into 2" on the focuser of my 200p as using the 1.25 doesn't allow me enough inwards focus. If I was using the 1.25 I could fit the filters to the adaptor but how do I go about it using the t adaptor straight into the focuser? There is a screw thread on the t adaptor but it is in between 1.25 and 2" I would like to use filters without the dslr so I'm not too keen on going down the eos clip route (unless it's the only option)

Thanks

[The_PSY3NTIST]

Is the 49mm thread the 2" thread?

[Shibby]

I use both an LP filter and and Ha filter, but I use the 2" versions because they reduce the vignetting that you would get with a 1.25" filter.

I can't advise on any adapters that will take the 1.25" filters, but if you decide to go the 2" route (recommended) then you will want something like the Max DSLR adapter: http://www.scopesnskies.com/prod/astro-engineering/astro-camera-adaptor/AC696-2inch%20to%20camera/DSLR.html You can also get adapters that let you use 2" filters with 1.25" eyepieces...

In my case, the filters screw onto the front of my (SW) coma corrector.

[The_PSY3NTIST]

Thanks Shibby. Do your filters measure exactly 2" on the thread? Or is it more like 49mm. The back of the t adaptor has a 49mm thread which is a nats off 2inch. I just don't want to buy a filter and it not fit. I can't us 1.25 unless I move the mirror up the scope and I don't fancy doing that .

Thanks

[Shibby]

Hmm, 2" filters are actually 48mm (M48x0.75). It might be a filter thread you have but I can't be sure about that...

[The_PSY3NTIST]

Thanks 48mm is about right. I'll risk it I think. Going to get one of the skywatcher lp filters first off. I'll post the result, might be of use to someone.

Thanks again