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  1. #1
    scott-fl's Avatar
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    Default Nearly full moon with Canon EOS 10D



    I took these last night with my new (to me) Canon 10D at prime focus in a 10" Dob. Pretty good detail, but a tad out of focus.

    I need to figure out how to get better focus, the viewfinder is not accurate enough.





    One thing I love about this DSLR vs. a webcam is the image detail at 3000 pixels wide.

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  3. #2
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    beautiful shot, Scott.

    Did you reduce the brightness of the image somehow so that it doesn't wash out your picture?
    Location: 30° 19' N; 97° 54' W; elev 248 meters; yellow/green zone; NELM 5.7
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    Nice shots man.
    name: Derek

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    Quote Originally Posted by MarkM View Post
    beautiful shot, Scott.

    Did you reduce the brightness of the image somehow so that it doesn't wash out your picture?
    Just played with the exposure time and ISO. I'm pretty sure this was at ISO 400 and 1/4000th sec exposure.

    Awesome detail for a 6 year old body I bought on eBay for $165.
    C6-SGT, 10" Dob, Nexstar 11 GPS, NexImage5, Orion SSAG, Rebel T3
    ----------------------
    night sky shines in sight,
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    Nice shots, and the focus isn't bad... this is a case where a Bahtinov mask would make focusing a lot easier.
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    Quote Originally Posted by AustinPSD View Post
    Nice shots, and the focus isn't bad... this is a case where a Bahtinov mask would make focusing a lot easier.
    Thanks. I think I'll try that. I'm going to clean the mirror and eyepiece on the camera first though.
    C6-SGT, 10" Dob, Nexstar 11 GPS, NexImage5, Orion SSAG, Rebel T3
    ----------------------
    night sky shines in sight,
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    it makes me feel right.

    A Haiku written by my daughter Valerie

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    Default

    Good work Scott. I tried an ISO of 100 with slower shutter speed recently. You can get away with it. Also have you any filters? Worth ago.
    Lovely work though!!
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    Default

    Hi Scott , nice image there Bud. Agree about getting the ISO down, Full Moon is very bright ,sometimes lacking in good detail to focus on . A bahtinov would not be best suited on the Moon. Its down to viewfinder , maybe with a angled magnifier attached OR , if 10D supports EOS Utility software suite , us that with a lappy to achieve good focus .
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    Pete makes a good point - a Bahtinov mask doesn't work (directly) with an extended object like the moon, it does its job with point sources like stars.

    I use it on a nearby star first, with the fine focus control in Nebulosity, then target the moon. The same idea will work with any knife-edge focuser as well, like the Stellar Technologies Stiletto.
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    Scott awesome shots, great focus. There is one tip I can offer, and that is to use Unsharp Mask. It makes up for tiny focusing error, just don't use too much of it - I think I use around 100% and keep the pixels down under 5 pixels used in Photoshop.

    Try a few different settings and see what you like, there are also other software besides Photoshop that can do this.
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