Quote:
|
Originally Posted by Don Pensack
How many people view Jupiter as it leaves the field of view? If you do, then the Pentax is for you.
|
I don't know if it's just me, because I don't hear other people complaining, but the XWs along with all other super-to-ultra-wides I've tried have way too much chromatic aberration to be useful right-to-the-edge as planetary EPs. e.g., there is strong red/green fringing on Jupiter. It starts appearing at half-way between centre and edge, where it can still be helped by adjusting eye placement. But a bit farther out, certainly outside the central 50-degrees, there is too much CA for pleasing planetary viewing. Understandably it's most apparent in my largest scope, the 12", but also there in the smaller ones.