Got photos back

[russ]

Al, I think Ant's right, it's Deneb and the top section Cygnus. I will give it another go later and see if it's possible to bring the North American Nebula.

Russ

[alxxx]

Russ Ant , i can see it now Thanks

Thanks for the email Ant so obvious when you mark it out like that ,

I couldn't see it until you done that

AL

[Ant]

Don't worry Al - that area of the sky is very difficult to track down as there are so many stars.

Good Image - so that's NGC7000 just below Deneb - is that your first DSO captured on film?

Ant

[alxxx]

I have got an image of all of cygnus and ngc7000, i posted somewhere here but i can't find it :oops: , but that was taken years ago, I'm sure though that there will be many more to follow though i don't know if they will be as good as yours, just seen you post in deep sky section , nice shots

AL

[Grant]

http://stargazerslounge.iseestars.net/viewtopic.php?t=113&highlight=

Is this it?

[alxxx]

Thats the one , Thanks Grant

[Grant]

No Problems,

Under everybodies post is a link to their profile, if you go to that theres a button to show all posts by that user. Makes it a bit easier on the memory.

Hope that helps,

Grant

[alxxx]

That helps thanks, i never noticed that :?

AL

[AndyMac]

If anyone can post a tutorial on removing vignetting, it would be much appreciated.

[Ant]

Yeah it's a very similar process to the star tail removal.

I'll sort one out for you andy - maybe next week now though!

Ant

[FLO]

what do you guys think really bad light pollution or jessops over exposeing/developing

or whatever they do . I cant understand why all the photos are like this regardless of the exposure/f stop, i think this one is about 30-40 sec.

and all the photos look grainy.

AL

Hi Al,

Heres the thing ... A cameras exposure meter is set to produce a mid-tone grey image. That is, if you were to photograph a white wall it will be exposed as grey.  As would a black wall, or your average astro-pic, it would also be grey.  This is because most of our pix are of landscapes and the like with average mid-tone reflectance and, because we have evolved to live here and not out in space, our eye/brain has become particularly good at seeing mid-tones. 

Once this is understood, it can be compensated for: For astro pix, setting your camera to underexpose by about 1.5-2 stops will help keep the blacks black and avoid blowing out the highlights.  Also, if you tell Jessops to print for a black background, with luck they will adjust their automated printing machine which like your camera, is also set to expose for mid-tones. 

Hope that helps 

Steve.