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johninderby

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Posts posted by johninderby

  1. The CCs hold collimation nearly as well as a mak unlike an SCT and both my 6” and 8”arrived perfectly collimated. Collimation of the CCs is easy BTW should it ever need doing. Not to be confused with an RC that can be tricky to collimate.

    A CC has a parabolic primary and a hyperbolic secondary and have a long focal length whereas an RC has a hyoerbolic primary and a hyperbolic secondary and a shorter focal length which explains the differences in collimation.

    So if buying a CC you can pretty well forget about collimation.

  2. Had a C8, then a Skymax180 and now settled on a Classical Cassegrain 8”. but may be a bit heavy for an EQ5.

    The 6” Classical Cassegrain is very nice though and a great lunar / planetary scope. Big advantage over a mak or SCT is that it doesn’t have a corrector plate so cools down quickly and doesn’t  suffer from dewing. Also has a proper crayford focuser. 

    https://www.firstlightoptics.com/telescopes-in-stock/stellalyra-6-f12-m-crf-classical-cassegrain-telescope-ota.html

    https://www.firstlightoptics.com/telescopes-in-stock/stellalyra-8-f12-m-lrs-classical-cassegrain-telescope-ota.html

  3. Celestron NexYZ 3-AXIS Universal Smartphone Holder

    In perfect working order.

    SOLD

    For some reason only comes with rubber on one of the jaws and the other is hard plastic but I have fitted rubber to the other jaw so it grips much better. 

    Three-axis adjustment. Centre it over the eyepiece with the X and Y knobs, and then move up or down over the eyepiece until you have the entire field of view in your shot.

    Payment:  PayPal ( buyer pays fees) or Bank Transfer.

            John

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  4. A Synta 8-24 zoom for my smartphone setup. Same as the Celestron branded zoom but just cheaper. 🙂

    Wanted a zoom with a t thread on the top to use with my TS smartphone holder. The TS holder is really solid as it’s basically an ali plate with an adaptor at one end to attach to the t thread on the eyepiece. Zero flexing. Dead easy to set up the phone as well. 👍🏻

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  5. The Orion 6x30 RACI finder is available on Amazon but at 69 quid delivered. Eeeek !!!. 🙀🙀🙀

    Bought the SW one a couple of weeks ago for my ScopeTech80 as I wanted sonething lighter than the 9x50.

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