[Martin Pugh]

Hi.
So the Celestron RASA optical responsiveness has been expanded to include 700-800nm. The Celestron FAQ on the RASA suggests that you would not need an IR cut filter.

Whereas most QHY CMOS colour cameras e.g 183C require you to add a UV/IR cut filter in the optical train otherwise your colour is impacted.

So I presume the right course of action would be to exclude the filter if you want to take advantage of this additional capability.

But of course, monochrome cameras are going to use some sort of filter which typically are UV/IR blocked, unless its a 'clear' filter. So there is not much you can do about that I suspect.

thoughts?
Martin