M45 -Ed 80/canon 300D

seeker372011 (Narayan) · #1 14-01-2006, 01:23 AM

The last image in 2005 and the one and only time the gear was out after October-night of dec 30/31

This is from Linden, so reasonably dark site, but the sky glow was something terrible

this is a stack of three ten minute images. ED 80 and canon 300d.

the mount (CG5) was autoguided

stacked in Iris
processed in photoshop
and yes neat image for noise removal -it was a very very warm night so very noisy raw frames

comments welcome

Thanks for looking

I actually have another half hour of lights at ISO 800 that I'll try and add to this lot to see if I can extract any improvement

asimov (John) · #2 14-01-2006, 02:19 AM

What a great image! Nice colour!

Well done Seeker.

Octane (Humayun) · #3 14-01-2006, 05:11 AM

What a beautiful image, Seeker. So crisp. Amazing!

Could you outline what processing, if any, you undertook in IRIS, apart from registration?

Regards,
Humayun

iceman (Mike) · #4 14-01-2006, 07:02 AM

Wow! Nice work Narayan! Great to see you posting something again. Hope you have a great holiday.

astroboy · #5 14-01-2006, 07:03 AM

Nice work excellent colour and sharpness.

Ive been waiting for the cooler weather before getting back to DSLR imaging I can see I don't have to .
A couple of questions, what is Neat image and what field flatener did you use.

Itchy · #6 14-01-2006, 07:18 AM

Nice work Seeker. The extra half hour should help you bring out more nebulosity.

Quote:

the one and only time the gear was out after October

I know what you mean. Will this cloud ever go away?

Cheers

atalas · #7 14-01-2006, 09:18 AM

Nice work Narayan !

h0ughy (David) · #8 14-01-2006, 09:37 AM

Now that is something to aspire to!!! Great shot! its awesome, thanks for posting it, if that doesn't get some of us inspired i don't know what else will. Something for me to aim for at lostock.

Striker (Tony) · #9 14-01-2006, 09:44 AM

Narayan.....I really like this image of yours....it's got a fair bit of wow factor...nicely done.

RB (Andrew) · #10 14-01-2006, 10:26 AM

Beautiful image Narayan.
Can't wait to see more of your work.

Cheers

seeker372011 (Narayan) · #11 14-01-2006, 03:15 PM

Thanks for the nice comments folks. It will be interesting to see what improvement will be possible once I add the extra half hour of data

Quote:

Originally Posted by Octane

Could you outline what processing, if any, you undertook in IRIS, apart from registration?

Regards,
Humayun

Hi Humayun

After dark subtraction, division by a flat and usual pre-processing in IRIS(ie conversion from RAW etc etc), I used the COREGISTER3 command (the COREGISTER2 command failed for some unknown reason) to align the frames two at a time and the ADD command to add the frames together

I did an ASINH stretch but it didn't seem to make too much difference so I simply took the stacked image to photoshop

In Photoshop I set black point, stretched levels slightly,

Finally subtracted an artificial flat field (duplicate the original image, clone stamp out any bright stars, blur like crazy, then subtract image from original using the Apply Image command in Photoshop) to get rid of some residual vignetting before running the image through Neat Image using default settings

Zane, Neat Image is this really good program for Noise removal... there is a demo version which is a free download and which is what I use-you can only save the output as a jpeg but hey I can live with that

http://www.neatimage.com/

I didnt use a field flattener..the optical train consisted of the ED 80 and Canon 300D at prime focus

I also worried about the noise but I made sure I got at least three dark frames of 10 minutes duration each as soon as possible after acquiring the lights and median combined these dark frames in IRIS to make a master dark--it certainly got rid of the terrible amp glow on the right hand side of the RAW images

Once again thanks for the interest

Narayan

Octane (Humayun) · #12 15-01-2006, 01:36 AM

Quote:

Originally Posted by seeker372011

Hi Humayun

After dark subtraction, division by a flat and usual pre-processing in IRIS(ie conversion from RAW etc etc), I used the COREGISTER3 command (the COREGISTER2 command failed for some unknown reason) to align the frames two at a time and the ADD command to add the frames together

I did an ASINH stretch but it didn't seem to make too much difference so I simply took the stacked image to photoshop

In Photoshop I set black point, stretched levels slightly,

Finally subtracted an artificial flat field (duplicate the original image, clone stamp out any bright stars, blur like crazy, then subtract image from original using the Apply Image command in Photoshop) to get rid of some residual vignetting before running the image through Neat Image using default settings

Thanks for your explanation, Narayan. I will bear these tips in mind next time I try shooting things.

Regards,
Humayun

seeker372011 (Narayan) · #13 12-02-2006, 11:31 PM

I finally got around to adding the additional 30 minutes of exposure at ISO 800 to my original and this is what I wound up with

in the end its probably not deep enough..wonder how many hours one would need to go with a Canon (unmodified)-many hours i'd suspect.but this is what I have been able to get so far

seeker372011 (Narayan) · #14 12-02-2006, 11:38 PM

Ok I guess i'm doing something wrong

I cant seem to upload an image

i give up, its too late at night

ving (David) · #15 13-02-2006, 02:37 PM

is it too large to upload narayan?

great image by the way

nice to see you on here again

seeker372011 (Narayan) · #16 13-02-2006, 08:35 PM

Quote:

Originally Posted by seeker372011

Ok I guess i'm doing something wrong

I cant seem to upload an image

i give up, its too late at night

Ok its the same problem that others seem to have had..thanks for sorting it out Mike

http://www.iceinspace.com.au/forum/s...ead.php?t=7595

anyway as described above, here's the latest processing outcome of an imaging session that actually took place in december of last year..my second go at M45 -an hour of exposure in total

Comments welcome, thanks for looking

narayan

EzyStyles (Eric) · #17 13-02-2006, 10:11 PM

that is a very verry nice pic you have seeker. you gave me hope

davidpretorius · #18 13-02-2006, 10:12 PM

you have done very well with this one. it reminds me of the quality i see in the books on astronomy!!!

awesome

beren · #19 13-02-2006, 11:10 PM

Wow that is a great image well done , its a tough target{ well for a novice like me anywhy]

iceman (Mike) · #20 14-02-2006, 07:02 AM

Wow Narayan that looks fantastic!

Welcome back and hope to see more from you again soon!