Comments on: IOM July 2009 – globular cluster M71 in Sagitta

By: kevan hubbard

kevan hubbard — Thu, 16 Jun 2011 10:57:03 +0000

Always a good but faint on for the summer,M71,managed to see it from just outside Brodick,Isle of Aran,Scotland,in Oct.last year with 8×20 binocs.not sure if u can see if from around Oxford due to light pollution,will have alook when it its higher,will try with my 8×30 monocular.

By: admin

admin — Thu, 09 Jul 2009 21:47:15 +0000

Hi Pete, you may have noticed some artefacts in some images (I don’t notice any in this image but I’m not an expert). The images presented on the website are resampled and compressed to try and ensure that most people get a faster download.

The images that Greg and Noel produce at full resolution are over 1MB in size – most people would be frustrated with downloading this size so we try to keep them at 500KB or less. Hope this helps.

Dave

By: Greg Parker

Greg Parker — Fri, 03 Jul 2009 19:55:18 +0000

Hi Pete,
I don’t see anything odd using both your methods to look at the image – guess it’s something to do with your settings. You can always go into the image gallery and see what things look like there.
Greg

By: Pete

Pete — Fri, 03 Jul 2009 14:35:02 +0000

Greg,
Re my previous comment – the image looks entirely different if I right click on it & go “view image”. hence, some sort of aliasing with my monitor resolution & how it’s presented on the web?
Peter

By: Pete

Pete — Fri, 03 Jul 2009 12:07:20 +0000

Does anyone else notice a regular variation in intensity in the image, both in X and Y? Like a regular patchiness?
Is it real (!), or is it my eyesight, or an artefact of imaging or processing?