Iris

[psemil]

Got two very good nights when I imaged this. Half of the exposures at home and the others on the top of the mountain at 1700 m.

Newton 8'' custom, Baader Mpcc, Eq6 Pro, Canon 500Da, iso 800, Exp - 21x10' + 19x5'.

Clear Sky.

[Fenriz]

First class image Emil, great job.

[glennbech]

Hi, That's an effort, 5+ hrs :-) You have managed to lure out the brown stuff around the iris. In my experience, that is very hard with a DSLR. Great work on that, I bet you skies are rather good?

[psemil]

Thanks Fenriz, Glenn.

Yes, it was realy hard (for me) to show the dust in this image. I was lucky to image half of the exposure at high altitude and almost perfect sky - gray - Bortle Dark-Sky scale

Those exposure almost doubled the S/N increasing also overall resolution with the lowest Fwhm I ever had in my images - 3'' (my resolution is 1.06 arcsec/pixel).

Clear Sky

[glennbech]

That was interesting reading about the scale, I am sorry to say I image under the best "red" category :-) Have you tried to stack only your good subs?

Could you explain how you measure fwhm?

[Fenriz]

Excellent article regarding light scale, I fall in the Green/Yellow range.

[ollypenrice]

It is indeed a deep capture. The dust takes an age even with cooled CCD and long subs. Attractive processing with a natural transitin to the reflection nebulosity.

Olly

[Dann]

Thats fantastic, the processing is great. DSLR images like this inspire me to practice.

[Aris Panagiotopoulos]

That's a seriously Imaged storm...in Space!

Great Job Man.

[psemil]

Thanks all for appreciation.

Glenn fwhm - with CCD inspector. Usually I image in green/blue zone but in summer for few nights I'm moving all equipment to mountains around my home (there are plenty of mountains here).

Olly i am really glad you like the processing. My primary goal was to show dust dimension and color in the nebula. I succeeded partially...

[Tim]

Lovely and dusty! very nice capture.

[RobH]

Exceptional image, especially with a DSLR and what isn't a huge amount of imaging time. Nicely controlled core too...often this is burned out in images of the Iris.

Cheers

Rob

[evilgeenius]

If half of your exposures are of considerably better quality than the other half, would it not be better just to stack the good half?

I really don't know the answer as I am complete imaging newbee, but i would have thought there was a point at which stacking lower quality frames with much higher ones would reduce the quality of the final stacked image.

Great image!