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johninderby

Beyond the Event Horizon
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Posts posted by johninderby

  1. More moon watching is needed uner different conditions to come to proper conclusions about the performance but first look was promising.

    The 4mm Nirvana eyepiece was really comfortable with bright views. Was OK with the 2x focal extender as well but felt about a 2.0 or 2.5mm or so is worth getting a hold of. So it  looks like about 200x is usable on the moon but about 175 might give better views. More experimenting to come under better conditions is in. order.

    • Like 1
  2. Well while clear really murky and could only make oit two stars.Couldn’t even do a star test.

    At least the moon was looking good and spent a while exploring the terminator and admiring the sharp contrasty views. Was surprised at the amount of detail that could be seen in Clavius despite only 82mm of aperture. A few craters could also be seen in Plato.as well. The Evolux82 isn’t supposed to be suitable for lunar observing according to SW  but it does a fine job with pleasing views.

    What stood out was just how  exceptionally sharp and contrasty the views were with no traces of CA. As good as I remember the old StellaMira 80mm f/10 was on the moon despite the Evolux being a faster scope. So while we have no idea of the glass used on the Evolux the fact that it performs as well as the FPL53 in the StellaMira (at least for visual) on the moon says a lot.

    • Like 4
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  3. Arrrghhhh!!!!

    Nice clear sky and the moon out so a bit of a first light of the Evolux82 so got the scope out and in the couple of minutes it took to get it set up wall to wall clouds. Give me a break. 🤬🤬🤬

    Edited

    Clearing up a bit so maybenot hopeless after all.

     

    • Like 1
    • Sad 1
  4. 16 minutes ago, VNA said:

    Orion Optics UK - disheartening "story"

    Hello, so sorry to read that, but I have nothing good to say about Orion, for one thing they don't manufacture anything--they are simply a reseller.

    Orion moved to Canada from Northern California, not sure why?

    Wrong

    Orion Optics Uk has a UK based factory where they manufacture all their own scopes including the optics.Not to be confused with Orion Optics US that is a totally seperate American company.

    https://www.orionoptics.co.uk/about-us/

  5. 22 minutes ago, BrendanC said:

    Thanks, but I'm a bit cack-handed with anything remotely DIY and I like the idea of the acetate sheet method, particularly getting my hands inside such a small area.

    Would this be suitable: https://www.amazon.co.uk/Vesey-Gallery-Acetate-Sheets-420x297mm/dp/B07SSLQ9RB/ref=sr_1_18?keywords=acetate+sheets+a3&qid=1654535861&s=officeproduct&sprefix=acetate+shee%2Coffice-products%2C59&sr=1-18

    The 400 micron would be thick enough.

  6. I use the following setup.

    The 2” ND3 and polarising filters are attached to the bottom of the rotator. Then the 1.25” continuum filter is fitted to the bottom of the 1.25” to T2 eyepiece holder using a ZWO 1.25” filter to T2 insert that screws into the bottom of the eyepiece holder.

    Simple but works extremely well.

    DA4F4DE9-AE8E-4709-9B2A-325D69D0DE6D.jpeg

    439B29FE-3A46-4618-BE50-21BFD34AE177.jpeg

    EC4A887D-934F-4161-AD6F-83646C92D7CE.jpeg

    56FA44C0-8377-4CF9-8837-C430AEF1768F.jpeg

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  7. Spptting scope eyepieces are optimised for daytime use and correct for the types of distortion that are evident in daytime terrestrial use but this usually comes at the expense of distortions that show up in astro use.

    So while it may be fine for astro use I’m waiting for a proper test by an SGL pr CN member that knows their stuff. If they give it the thumbs up then OK I’ll reconsider.🤔

    • Like 1
  8. Hi

    You will need ia little finder dovetail. I used the one rhat comes with this finder shoe and dovetail set

    https://www.amazon.co.uk/Svbony-Telescope-Finderscope-Dovetail-Standard/dp/B08LDKD8ST/ref=sr_1_5?crid=OI2IX4E8HIRY&keywords=svbony+dovetail&qid=1654353980&sprefix=svbony+dovetail%2Caps%2C109&sr=8-5

    Then I used a bit of Delrin (acetal) plastic sheet for the plate that the dovetail fits to. An eBay offcut will do.

    Then a couple of small nuts and bolts. M5 will do.

    Hope that’s enough onfo.

    • Like 1
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