Hi Russell,
Yeah, not good for sure. I'm lucky sometimes with cold southerlies in Autumn that clear the air but I really need to buy a couple of 2" filters, UHC and O III I think.
I have them in 1.25" for the ZWO which I can cool but I do like the Canon and BYE so might have to bite the bullet.
I'll have a play with the ZWO in both setups and see how it does and think about it ( and build up the astro fund a bit ).
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