From: "Christoph Bosshard" <chboss@hispeed.ch>

Date: November 27, 2007 1:47:48 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: Mars Fri Nov 23


Hi Duane


Thanks for your comment.


Can you point me to some detailed sources regarding stretching the

curves? Would you do this in IIDC or in Photoshop?


Hopefully there will be more good material to work with in the comming

weeks. I am still doing some changes to my equipment at the moment to

be well prepared.  :-)


I will certainly post the results to get some more tips on how to 

improve. I think it is a great way of learning.


regards

Chris



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