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  1. #1
    Chris.B's Avatar
    Chris.B Guest

    Default Digital compact camera - low light, low weight, and threaded lens



    James Harris wrote:

    Hi James

    It's far too quiet so here are some random thoughts:

    Unfortunately not many compact digital cameras seem to have a lens
    thread.

    The weight of cameras also seems to follow a maker trend.

    Weight suggest quality to the ignorant and impressionable. Think Nikon
    SLRs and Olympic weight lifters! I thought the Olympus SLRs more than
    heavy enough!

    My £200 Canon Ixus 860IS feels like half a brick at 155g. My £70
    Vivitar 7388S feels much lighter at 135g. I'd prefer half that for a
    pocket camera. My Olde Sony P71 weighed 274g and now feels like two
    whole bricks taped together with a postage stamp for a screen.

    The Vivitar goes everywhere with me. Even on cycle rides. The Canon
    only goes out in the car or around the house and garden.

    I have been delighted with the results from both cameras. The Vivitar
    is a little jewel for the asking price with a huge screen. A spare
    battery is always handy. The Canon battery lasts literally for months.
    The Vivitar for a couple of weeks. Both get lots of exercise so I
    needed a larger hard drive. Thanks to these three digital cameras I
    now have 12,000 image files worth 10GB. Not all astronomy, I hasten to
    add.

    If you go into the menus you can set the lens not to retract. The lens
    housing could then be used in a simple tubular, eyepiece adaptor.
    Though I'd want a short lanyard to catch the camera if it slipped.

    Somebody ought to do a plastic eyepiece adaptor with a proper clamping
    ring for various compact camera lenses. Rather like they do for
    webcams but without the tiny thread.

    I made a simple adaptor for my Sony tripod screw hole using a piece of
    alloy plate and a Tufnol block bored in the lathe to fit the outside
    of my 2" focussing mount. I used it for eyepiece projection on the Sun
    during a transit with the Sony lens set to stay out and a full
    aperture solar foil filter on my 6" refractor.

    Regards
    Chris

    http://fullerscopes.blogspot.com/

  2. #2
    James Harris's Avatar
    James Harris Guest

    Default Digital compact camera - low light, low weight, and threaded lens

    On 19 Sep, 00:03, "Chris.B" <chri...@mail.dk> wrote:

    It is. Thanks for adding comments.


    That's only 20g of difference. Does it really change the perceived
    weight so much?


    You mean to clamp to the lens barrel? That could work. I still prefer
    the idea of mounting on a thread but your suggestion sounds far better
    than the tripod mount.



    OK. Here's another mounting method using the tripod mount that sounds
    similar (but not such good value!)

    http://www.scopetronics.com/kit-images/type3-dt.htm

    --
    James

 

 

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