I think there are  times when the subject of a photo is so significant that 
centering is desirable. This is one of those times,

Paul via phone

> On Oct 15, 2013, at 7:38 PM, Stan Halpin <[email protected]> wrote:
> 
> Very nice indeed!
> 
> Note that the following is a serious question and is in no way intended to 
> diminish your accomplishment and the complexity of producing this sort of 
> image . . .
> 
> A classic problem with newbies is the tendency to put the main subject in 
> center-frame. A similar problem with us more experienced types (i.e., oldies) 
> is to ignore composition while working through new techniques.  So, in that 
> context my question is whether the composition in your m31 shot is 
> satisfactory for you, or if it is just  incidental to the experimentation 
> process? I also wondered if there is something about the way the astrotracer 
> works that makes it desirable or even necessary to center the main subject . 
> . . I like the image but would like to see it cropped to bring the m31 
> downwards and to the right. Or re-shot with that framing in mind.
> 
> stan
> 
>> On Oct 15, 2013, at 7:00 PM, Darren Addy wrote:
>> 
>> Y'all may recall
>> (hey, that rhymes!)
>> the m31 (Andromeda galaxy) image I shared a few days ago. It was a
>> single 45 second exposure and made from a single in-camera JPEG (not
>> even the RAW file).
>> Refresher link: http://www.flickr.com/photos/pixelsmithy/10181475554/
>> 
>> Well, I finally got to attempt my first use of the freeware
>> DeepSkyStacker (version 3.3.3 beta 51) and with it I stacked the 11
>> "good" RAW images that I had taken that evening. Added together, they
>> represent a 6 minute "integrated" exposure time.
>> 
>> The latest versions of DSS also let you work with the histogram (in R,
>> G, & B), luminance, and saturation, along with the curves. I then
>> applied a few Photoshop astrophotography-related actions and adjusted
>> the color-balance, which seemed a bit green to my eye. Here is the
>> result:
>> 
>> http://www.flickr.com/photos/pixelsmithy/10299785464/
>> 
>> This is still not even doing everything "right" because I was working
>> with no "dark frames", "bias frames", or "flats" which would make for
>> an even better stacked image (especially where noise is concerned).
>> Still I'm pretty pleased with the result, for my "maiden DSS voyage".
>> 
>> K-5ii, O-GPS1, ISO 800 K135mm f2.5 @ f4
> 
> 
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