Where should I stick it? (my filter!)

[peonic]

Hi Guys,

Quick question about imaging train setups.

I currently have an ASI-533MC pro, which requires some extension tubes to achieve focus in my SW ED80.

I've been connecting it as Camera > Extension Tubes > 1.25" Nosepiece Adapter > Filter (either IR Cut or L-Extreme) > Scope

Is this an OK way to do things, or do I need to get the filter closer to the sensor? 

Any advice?

 

Chris

[Pitch Black Skies]

Hi Chris,

You can probably get away with it like that as the sensor is small and very forgiving, however I had my filter as close to the sensor as possible for best practice.

I threaded my UV/IR cut filter into the provided T2-1.25" adapter, then threaded that adapter into the first backspace extension that was threaded to the camera body. This left the filter body about 1mm from the AR glass window.

[peonic]

Cheers bud. I was thinking about getting the .85 flattener/reducer and that lead me to ponder how I'd connect it with the filter in the mix!

I'll give it a try next time the clouds clear off!

 

Chris

[Budgie1]

I was typing the same thing as @Pitch Black Skies but got beaten to it , so here's the link to the adaptor on FLO's website if you don't have one: https://www.firstlightoptics.com/zwo-accessories/zwo-t2-to-125-filter-holder.html

With my ASI294MC Pro, I used this method when I started using filters, now I use a filter draw, so I can change filter without taking the rig apart.

 

Edited June 19, 2022 by Budgie1

[Clarkey]

The only thing I would say about putting filters very close to the sensor is that there is a risk of reflections on bright stars. If you don't need the filter too close then having it slightly further away can alleviate the problem. Probably not a problem with your set up, but with some scopes it can be a problem.