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Thread: M31 Andromeda

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    Default M31 Andromeda



    M31 Andromeda

    was low lying and a lot of noise, but got something from 2X10 minute subs. I will try 10-20 and see what I get.

    I think I got more trailing as its near the horizon and balance and weight may be an issue now - too much stress for the mount gears but I am happy I finally see details of a galaxy not too far away!

    Besides the Eta Carinae and the LMC which were taken with a lens in a very dark sky, this is probably my most happy shot with the scope and guider here in the city - can't wait to go to the dark sky location with guiding skills.

    Unmodified Canon 450D
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    no darks/no flats
    SHOT IN RAW
    captured & processed in Nebulosity

    Processed in Nebulosity - played with scale intensity, TIFF Uncompressed imported into Photoshop with Levels several times, brightness and contrast - cropped down to about 700 width
    Good seeing
    Never seen the milky way from this city location - only can see milky way if travel 200km away from this location

    Bortle Scale - Red - White

    2X10 min subs:



    What I noticed is that even 5 minute subs show much more garbage and noise, but at least the 10 minute sub on low ISO shows details that you can process.

    I will post the 5 minute subs to show you what I mean, I took 10 and processed them and was not happy with the results but I am very happy with the 2X 10 ones!

    3X 10 minute subs with better processing:
    Attached Images Attached Images
    Last edited by admin; 07-17-2010 at 07:14 PM. Reason: edit spelling
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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    Default

    Hey Gus thats excellent from your area.
    The dark lanes are coming through in this. I am amazed with the detail in it.
    Tracking looks good for 10 minute subs. I certainly would be happy with that before I pushed on mate..
    All I can do is look at my rig set up in my room..
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    Default

    Thanks Declan, I too am surprised I can see the dark lanes but maybe that there is a lot of contrast enough to pick up with even my camera in the city.

    I was a bit disappointed near the horizon the mount tracks a bit poorly even with the guider, on close inspection there are some trails but higher up guiding in the sky even with 15 minutes they are very tight stars.
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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    Looking at it again, I would say that there is a lot more data in those 2 images then you have extracted initially.
    I think you shoot in raw..it just looks like there is a lot more in it. Not sure of the process, but there is that great thread started in the AP that I am going to have a look at again when I get going in this direction.
    I am aware with yourself there is time constraints, but your inspiring me...
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    Thanks I will upload the fits when i can and post them in the image processing forum for people to teach me a thing or two
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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    Default

    I agree with Declan -- as nice as the image is, there's more data hidden there most likely. As I mentioned in seal killer's M31 thread, this is a notoriously difficult target to process.

    Gus, what's your light pollution color zone? And why only 3 subs? Why not more? Why not high ISO? You can reduce ISO noise with more subs + calibration. I would suggest getting LOTS and LOTS of subs.
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    well done the process got more detail on it... i love this galaxie... and will be my first target when i start with dslr photography...

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    Smartly done Gus, you have been busy! I like that tracery of the dust lanes you captured...and am always encouraged when I see your work with the 100ED Hmmm, makes me feel like a bit of a slacker , guess I'd better get to work. Thanks for sharing, another "well done" to you.
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    Nice pics.

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    Thanks everyone I posted the data for processing but with an extra 10 minute frame here:

    M31 Andromeda Data for Image Processing

    There will also be 10X 5 minute subs but they are orange from the pollution, the 10 minute subs were taken higher in the sky (but still quite low).

    For fun I will combine all 14 and see what we can do with the data.
    Name: Gus OTAs: ED 100 PRO refractor, Orion ST80 (not the CF), 8" Dob stuck in Canada Mounts:HEQ5PRO Synscan mount, Manfrotto Tripod CAMS: Guidecam Philips SPC900 webcams (4), Canon unmodded-450D DSLR

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