1.25” or 2” filter Askar 103 asi533

[David 55]

Hoping I can get some help in this, I have a Askar 103 with the.8 reducer also using a asi533mc camera. I know the 533 takes 1.25” filters and I can put 2” filters in the reducer. What I am hoping someone can help with is it better to go with the filter on the camera as it is closer or use 2” filter in the reducer in case I get a different camera later on? Thank you in advance 

[900SL]

What filter? Are you intending to get a filter wheel?

[David 55]

It would just be an ir/uv cut filter for now then maybe a narrowband filter. No wheel

[Vroobel]

It's always good to have 2" filters if you can buy them, especially if you consider the bigger sensor. 

[TiffsAndAstro]

I get vignetteing on mine with a 1.25" UV IR cut doing flats

Using 2" Ha Oiii I didnt see any

I've got a 2" UV IR cut in the post

I use a filter draw 

Edited September 4 by TiffsAndAstro

[Pompey Monkey]

It's a small sensor (16mm diagonal), so you should have no problems with your existing 1.25" filters.

Edited September 5 by Pompey Monkey

[Budgie1]

If you use the 1.25" filter adaptor, which should have come with the camera, and screw this into the 11mm spacer directly in front of the camera sensor, then you can use the 1.25" filters. 

It's only when the filters are placed further away from the sensor window that you may start to see vignetting.  

[David 55]

Thank you for all of your answers 😊

[Elp]

Although you don't need them for small sensors I decided from the start to go 2 inch, and glad I did, mostly because I use a lot of camera lenses and can screw them into the front of most lenses with step down rings, the future proofing alone will pay for itself if I decide to go for a larger sensor.