British Astronomical Association

Supporting amateur astronomers since 1890

Roger Dymock

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  • 2 February 2016 at 2:23 pm in reply to: Focusing a refractor plus field flattener attached to DSLR camera #577237
    Roger Dymock
    Participant

    Hi Richard,

    Thanks for your comments. Ron Arbour’s article in this months JBAA reminded me that I have a Bahtinov mask suitable for my refractor. Bench testing showed that focusing for the ‘smallest blob’ using Live View is nowhere near as accurate as using the mask. Nick James suggested checking the focus across the whole image so I will try that using the mask asap.

    I would rather it be a focus problemn than what you suggest which sounds more difficult to fix. Hopefully tonight or tomorrow night will provide clear conditions. 

    Regards

    30 October 2015 at 4:53 pm in reply to: Short tube, wide field refractor OTA #577136
    Roger Dymock
    Participant

    Thanks for the help. Have decided on the William Optics 71ED.

    Regards

    5 May 2015 at 4:05 pm in reply to: Goto mount for DSLR camera #576855
    Roger Dymock
    Participant

    Thanks for your replies. I have a Skytracker but, to me, the big disadvantage is that you can’t easily move the camera from one object to another (or make fine adjustments). Goto – why not – makes life a lot easier. Never was into setting circles!!!

    Regards

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