CA in Astro Photography

[Regulus]

My friend is buying the Explore Scientific 127 Achromatic and is hoping the Chromatic Aberration isn't going to disappoint him esp. when it comes to his first forays into astro-photography.

Although the limited reviews I've seen say good things they do mention CA around bright objects (eg Moon and possibly Jupiter/Venus etc).

What I don't know is whether the problem becomes more noticeable in long exposures of the usual photographic targets.

Anybody had experience with this??

Thanks - Regulus

[dannat]

Usually an achro is only good for mono or blk/wht phtography

[bert]

Yep I have,

He will end up with stars with either big red haloes or blue haloes. Basically blue or red will be out of focus.

Some people have has success with the chromacorr. I havent tried one, I just spent the bucks and got an apo.

Brett

[Regulus]

Thanks guys for your responses.

What I thought too.

Am interested in these Chromocors though as an idea. And since he is on a budget it means slowly putting it all together
Might be good to get the ES 127 and later a chromocor - provided it will take Adapters and Cameras

Cheers.
:hi:
Trevor