Spot the difference

Folks - continuing on the improvement theme...

Enjoy!

Dave


1. M57 Planetary nebula - middle row. Before is left, update is right. Tell me what you think...

www.astroshack.net/gallery/nebulae/nebulae.php


2. M13 Globular Cluster - top row, two images to the right. Before is left, update is right. The difference here really surprised me - I certainly captured way more stars without burning out the core. But can you see what looks like coma towards the edges?

www.astroshack.net/gallery/clusters/clusters.php

You know, on your Ring Nebula one, I prefer the one from last year! It has more stars in the field, and the nebulosity is not as, well, boosted! Your new one has less stars, but looks like the gain on the nebula is higher.

1st M57 for me, I'm afraid!

On the M13 one, there is a lot of vignetting in the field. You said top row, the 2 right images... both of these are dated 2005...

I'D have to agree with Seanie on M57, Last years seems better.

As you say M13 on the right is way better, but the stars on the outside look as if they are in motion relative to the core, particularly on left side of image

Seanie - glad it wasn't just me then!

I think my processing skills are still way off. As well as my typing (fixed the 2005 mistake - well spotted!)

The stars *are* in the second nebula but I concentrated on only bringing out detail in the nebula itself. This of course dimmed the starts to extinction. The litlle galaxy visible in the 1st image is also in the 2nd - but its extinguished as for the stars...

Trevor - the globular is giving me a bit of heartburn... I'm not sure that the issue is vignetting but TBH I think I've seen something that looks like vignetting on deep images I've taken before. Certainly the stars are consitently more eggy at the edge of the field - and I've not noticed that ever before Any optics experts out there?

Thanks for the coments lads. I'm off to compose a mail to Eirik - he can process them so they're perfect

Cheers

Dave

I'll also add my agreement that the old M57 is better but the new M13 kicks butt!

You know, on your Ring Nebula one, I prefer the one from last year! It has more stars in the field, and the nebulosity is not as, well, boosted! Your new one has less stars, but looks like the gain on the nebula is higher.

1st M57 for me, I'm afraid!

Yea, you are getting at lot worse at this imaging lark