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  1. #1
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    Default advice on tele-extender please



    Hi...i have a celestron nexstar 127slt and a canon d600 dslr...i really would like to get a tele-extender but really dont know where to start...are they all more or less the same? I was thinking of getting a
    Celestron Deluxe Photographic Tele-Extender or is there a better one?

  2. #2
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    Default Re: advice on tele-extender please

    A tele extender for a 127SLT is useful for photographing the moon and planets with a DSLR. It is not something to use if you want to photograph deep space objects. For deep space objects you need a focal reducer. For photographing planets, a web camera is a better choice than a DSLR.
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    ZEQ25 mount;
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    SynScan AZ
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    Mount;

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    ST-80A 80mm Refractor (OTA); Meade
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    203mm SCT (OTA);
    Meade DS2090AT 90mm Refractor; Meade 2045LX3 102mm SCT;
    Celestron NexStar 4 SE 102mm MAK; Celestron Advanced Series C6S (XLT) 150mm SCT
    with an iOptron GOTO Drive

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  4. #3
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    Default Re: advice on tele-extender please

    thanks for the advice...only reason i was looking at getting a tele-extender was because i was under the impression that i would need to use my 25mm eyepiece for nebulas etc, i didnt think a 2x barlow would be powerful enough but thats great if i just need a focal reducer...can hint to my kids what i would like for mothers day now just out of interest what are the main benefits of a tele-extender? probably a stupid question but thats me all over lol

  5. #4
    sxinias's Avatar
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    Default Re: advice on tele-extender please

    Focal reducers are typically used for photography to produce smaller but brighter images. For viewing nebulae and galaxies you can either use a focal reducer or simply get a 32 or 35 mm eyepiece. The eyepiece is the least expensive option.

    To use a SCT 0.63 focal reducer on your 127SLT you will first need to get a Maksutov Cassegrain to Schmidt Cassegrain rear thread adapter, the focal reducer, and a SCT visual back. Using a 32 or 35 mm eyepiece will do the same for visual work and is a much simpler solution as all you need is the eyepiece. I use a Meade series 4000 32 mm eyepiece with my three SCTs and one MAK. I seldom use the 25mm eyepieces that came with my scopes.
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    ST-80A 80mm Refractor (OTA); Meade
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    203mm SCT (OTA);
    Meade DS2090AT 90mm Refractor; Meade 2045LX3 102mm SCT;
    Celestron NexStar 4 SE 102mm MAK; Celestron Advanced Series C6S (XLT) 150mm SCT
    with an iOptron GOTO Drive

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