Mars 19 Oct

[MrEd]

Hi All

This is my first Clear Mars this season.

Seeing was great.

Captured @ f40 with an 8" SCT and a Mono Toucam.

The image is a colour combination of R IR G B as this gave the best balance.

Still having trouble with the Limb. Can anyone suggest a way to improve the Limb

artifact before opposition?

Regards

Ed

[Astroman]

Looks like an alignment issue to me. More than that, I can't say.

[barkis]

It don't look too bad ED. You will sort it before the big O, I 'm sure.

Ron.

[legion48]

I think that's a great Mars.

[beamish]

I agree with Legion. I'm sorry if this sounds like a daft question -but what exactly do you refer to when you speak of the "limb artifact" ?

Karlo

[Trevor]

Great shot Ed as usual.

Could the artefact be due to which way round the channels are stacked?

[MrEd]

OK sorry every one

Heres what i mean.......

Before Mars comes to Opposition and is in

a gibbous type phase,webcam imagers tend

to get a harsh sharpening effect along the limb.

It is nearly always there and dissapears at around opposition time.

I think it has something to so with Phase,Atmospheric conditions and

processing but many armatures seem to pick it up.

Only some of the pros seem to be able to reduce-Eliminate it. (hence my question)

I hope that helps.

regards

Ed

[beamish]

I can't help you with that Ed but thanks for explaining.

Karlo

[Nick Smith]

Very nice capture Ed!

The limb artifact! Everyone gets it, specifically in the red channel and its a [removed word] to get rid of. Personally, I use the healing brush tool in Photoshop, but I'm sure there must be a better way.

Regards

Nick

[mik]

Great image nice contrast well done.

Mick.

[Cloudgazer]

Nice Mars Pic Ed..

Scott