setting up the asi1600

[Wirral man]

Hi all just wondered which way to setup the asi1600mm pro im will be using the 1.25" efw....so do i use the 1.25" t-piece or can i use the 2" adapter instead also i have a 2"light pollution filter can that be used with this setup thanks.john 

[Demonperformer]

The camera should screw directly into the efw. It is generally better to screw this directly into the scope if possible. You should be able to screw the 2" LP filter directly into the camera, before the efw.

[david_taurus83]

If the filter wheel has a 2" nosepice with threaded end to receive filters you could use that. I have had issues with my clip in filter in my Canon. I have suspicions that if I'm shooting close enough to a streetlight from my back garden that it's reflecting broadband L.P. onto my coma corrector and causing reflections. If I had to buy an LPF again it would be a 2" mounted in front of the entire imaging train.

[IanL]

Go with whatever reduces the distance between the sensor and the filters to the shortest distance to reduce vignetting, though if you end up with reflection/halo issues you may need to try other options. With regard to the LP filter, I've found that a double stack of LP and LRGB filters as you are proposing makes it impossible to get good focus and increases reflection issues. Your mileage may vary and you'll soon know what works. There will be no benefit from an LP filter when using Narrowband filters.

[Wirral man]

right ok that makes sense will just see how things go just hope this weather is going to improve now..

[david_taurus83]

30 minutes ago, Wirral man said:

right ok that makes sense will just see how things go just hope this weather is going to improve now..

You've splashed out big. Now it's raining. Expect at least one day of cloud cover for every 100 quid spent! ?