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  1. #1
    Dublin sky watch's Avatar
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    Arrow The Whirlpool galaxy. M51



    This was an image I did not expect to see processed. I had happened upon it quite by accident on my last night at my dark site. My planning for observation sessions needs to be worked on big time. Fancy stumbling upon the Whirlpool Galaxy.
    It is 2 images only stacked.
    Exposure time about 3 minutes.
    ISO was..6400!!! Real race against time and clouds for these shots.
    50mm lens piggybacked on top of the cpc800.
    Weather was -4 and very frosty @ 12.00 UTC
    Quite noisey I know, but thought it was still one I could be happy with for a DSO.
    Thanks.
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  3. #2
    AustinPSD's Avatar
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    Really nice - serendipity... the noise isn't too bad, especially considering the ISO 6400.

    For a two-shot stack the amount of detail you pulled out is excellent.
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  5. #3
    Dublin sky watch's Avatar
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    For a two-shot stack the amount of detail you pulled out is excellent.
    I too was amazed with it. It really goes to show Austin, that when I have least idea of what I am doing the better it seems to be. Me thinks more serendipity is needed when I go out imaging in future.
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  6. #4
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    Great shot Declan... glad you beat the clouds!

    Carol

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    Default

    Nice work Dublin! Very good detail for a 2 shot stack! What F stop setting did you use if you don't mind my asking? Also for my own clarification, you used the camera as prime focus with a 50mm lens? Just trying to pick up some pointers and exposure settings and equipment used for when I finally get clear skies on a day off.
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  10. #6
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    Default

    Nice picture, Declan!
    I'm really considering getting a DSLR, too. I've tried to get color pictures by stacking shots done with different filters and it's really a pain... especially with my AltAz mount.

    I was taking shots of M51 last night too.
    The first attached is the result of stacking aprox 25 shots, 8 second exposure with a celestron focal reducer.
    The scond picture is an older picture of M51 done with the same equipment (Celestron 6se, Meade DSI Pro II but without the focal reducer).
    I've found out that using the focal reducer makes my life way easier in finding targets and taking pictures.
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  12. #7
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    Default

    realy beautifull

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    Ghostrhyderflyby
    for my own clarification, you used the camera as prime focus with a 50mm lens?
    I rechecked the metedata and my original post is inaccurate, I was reading the wrong metadata. Sorry. Your correct it was prime focus...no 50mm lens used.
    So it was not piggy backed either. Will see if I can change the above.
    Thank you.
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    Cyprian
    I've found out that using the focal reducer makes my life way easier in finding targets and taking pictures.
    I haven't got a reducer yet, am holding off for the moment. But it is on my list after every thing else...as you know.
    I had a look at your web site the other day ...really good images cyprian.
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  17. #10
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    Declan great shot by the way! If you had a few more frames to stack next time put them together

    nice work!
    hope to see some more shots soon,
    clear skies!
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