From: "Duane" <macastronomer@mac.com>

Date: November 27, 2007 12:19:34 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: Mars Fri Nov 23

Hi Chris,

Thanks for the feedback. I think that left right alignment is actually a bit of bubbling (disk 

size due to atmospheric refraction) but reprocessing may allow me to get a better pick on 

the photos that are accepted. I rather loath picking them by hand, but it is another option.

Nice shot too. I always figure that if I can tell which side of Mars is showing that it was 

worth while night. It looks to me like you have the Mare Serinum side.

There's a little bit of posterization on your image that can be avoided using curves to stretch the area in the histogram that contains Mars' data before doing too much 

sharpening or other processing.

Keep shooting and sharing. I find it really helpful to see what others are doing.

Tonight, major wind and jetstream issues here. Time to get some sleep :)

Duane

--- In Astro_IIDC@yahoogroups.com, "Christoph Bosshard" <chboss@...> wrote:

Hi Duane,

Nice shot! 

Sirtis Mayor on the left clearly stands out.

http://homepage.mac.com/deal/share/20071123_021109-Mars.jpg

If you see anything I could be doing better, feel free to let me know.

Seems to me like the alignment of the images was not perfect. Looks

like there is a slight left to right misalignment. Maybe retry the

stacking process with different settings. I am quite new to IIDC so I

can not make detailed sugestions.

I had just one chance with Mars this season and the seeing was not good.

The "small" 90mm Refractor is also limiting the results at the moment.

Here is a link to my result:

http://aida.astroinfo.org/displayimage.php?pos=-3706

regards

Chris