Now, let's say I want to take a wider shot, like when imaging a larger chunk of the Moon. I could do a mosaic. But that's a lot of frames I need to take. It would be nice if I could use a bigger sensor, take fewer shots, and save time. This is what's important to me, saving time.
I also want to keep using the ADC to avoid fringing and blurry edges (I really like the ADC).
So here's my question: say, I plug the ASI071MC (which I normally use for DSO) into the 1.25" stack containing the 2.5x barlow and the ADC. I know I am going to lose the corners, which is fine. But I wonder - how much exactly of the whole frame am I going to lose? Does anyone have an estimate?
I realize I will not be able to frame the whole Moon at f/25 with the ASI071MC, and that's fine too. I'm just curious for an estimate for the amount of corner clipping that will occur.
It's hard to say an exactly amount of corner clipping that will occur. Regard the corners, we suggest you remove the 2.5x barlow , and replace it with a 0.7x or 0.8x focal reducer.