Deep Space Imaging and stacking images for less noise

[Andy Resnick]

OK I see my misunderstanding LOL till I did comparisons of star fields, I didn't realize it was so faint on your image ... so big arrow to hilite it for others reading the thread ...

Yeah, it's still down in the dirt. I can pull it out more, but then the non-perfect background subtraction becomes more noticeable as well. I'm also becoming more painfully aware of the display differences between a Mac and WinBlows.

 

[davenn]

I'm also becoming more painfully aware of the display differences between a Mac and WinBlows.

in what way ?

 

[Andy Resnick]

in what way ?

I think it's 'gamma'- contrast at the low end is higher on my Mac than my windows box.

 

[glappkaeft]

That's not really Microsofts fault now is it?

 

[davenn]

That's not really Microsofts fault now is it?

maybe not
one would have to do a comparison with the same brand monitors and both calibrated

Andy, unless your monitors were calibrated, you can't really do a comparison, there's just too much variation

here's a professional calibration tool ...
http://www.digitalcamerawarehouse.com.au/prod8682.htm
Dave

 

[glappkaeft]

Yeah, I make sure my my main photo editing screen (a DELL Ultrasharp U2711H) is well calibrated. It is sometimes a bit annoying since a well calibrated screen is rather bright if you turn the lights down in the room.

 

[Chronos]

I believe Canon offers a good AP option with their more recent DSL series. I use APT as my interface, which also appears a good option. I, of course, welcome dissenting opinions.

 

[davenn]

I use APT as my interface

not sure what you are referring to ?

... yeah, that didn't really work out on the 5D s(sr) ... the filtering was still too strong

Nikon did a much better job with the D810A which was designed exclusively for AP
with a filtering system in it that specifically enhances the appropriate band pass areas eg Ha
(Hydrogen Alpha)
Because of the huge cost of the D810A and the fact I would have to buy new lenses, I went the other way and bought a Canon 700D and did my own filter mod. This removed the IR filter and the colour bandwidth limiting filter giving a big increase in sensitivity to the red end of the spectrumDave

 

[Chronos]

The latest version of APT is here http://www.ideiki.com/astro/Default.aspx. Its pretty reasonable at less than 20 euros.

 

[davenn]

The latest version of APT is here http://www.ideiki.com/astro/Default.aspx. Its pretty reasonable at less than 20 euros.

cool, thankyou, wasn't aware of that oneDave