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John

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Posts posted by John

  1. 1 minute ago, JeremyS said:

    Tell us more John!

    3 hours of filming with ITV on Clifton Down, Bristol with fellow Bristol AS members pretending to be at a star party, in the fog, in the persistent rain, We bought our own scopes including an 18/20 inch dob which took ages to get in place only for the production people to decide that it didn't look enough like a telescope. They had put some tiny tents up that we were supposed to crawl in and out of looking excited. They put masking tape all over my scope to hide the branding and insisted that having the lens cap on did not look realistic (true - but it was raining !). It took ages to dry and clean the objective later. 

    The piece was going to be part of a montage that ITV used to show local activities before the evening news. As far as I know our bit was left on the cutting room floor. We probably looked a bit too wet and grumpy !

    We did get some pocket money for doing it though and I did get to know some of the good folks at Bristol AS a little better in the pub so it was not all a negative experience :smiley: 

    My only experience as an "Extra" and probably that's a good thing ! :rolleyes2:

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  2. 6 minutes ago, jock1958 said:

    If I had my time again I would probably have gone for the TS AZ5 over the Skytee 2 purely from whats been said in regards to the quality differences. 

    Plus TS sensibly sell it without the poor stock DT clamps on it. Those things are an accident waiting to happen IMHO :rolleyes2:

    Can't imagine why Synta have not improved them over the years that the mount has been sold.

     

     

    • Like 2
  3. Coma correctors are only really needed if you use wide angle or very wide angle eyepieces AND the coma distortions that you might see at the edges of the field of view bother you. Many folks use scopes of these specs without a coma corrector quite happily.

    If they did include one, such as the Baader one it would add £135 to the price of the scope. If it was a Tele Vue one, it would add nearly £500 to the price of the scope !

    I think useful upgrades might be to add a illuminated reticule finder to the scope, the Telrad is very good, a cheshire collimator and a good guide to what to see such as "Turn Left at Orion"

    https://www.firstlightoptics.com/finders/telrad-finder-astronomy.html

    https://www.firstlightoptics.com/other-collimation-tools/astro-essentials-cheshire-collimating-eyepiece.html

    https://www.firstlightoptics.com/books/turn-left-at-orion-book.html

    In due course there are almost endless further upgrades to eyepieces, filters etc to consume any disposable income you might have !

    Enjoy the scope :smiley:

     

     

  4. I guess it's 150mm SCT which Synta have made with the Skywatcher branding on it rather than the Celestron branding. Synta make the SCT's below 11 inches (maybe 14 ?) now as they own Celestron.

    Whether this means that we will see Skywatcher branded SCT's at some point, who knows ?

    For a while in the USA you could get Orion (USA) branded SCT's. This is an Orion branded C11:

    REDUCED-Orion/Celestron C11 SCT, XLT, Extras | Astromart

    The above OTA is from the era when the C11 was still made in the USA I think.

     

     

    • Like 1
  5. Having tried for the HH quite often and not got it, I came to the conclusion that the trick was going to be to be able to see / detect the underlying streak of emission nebulosity IC 434 which Barnard 33 (The Horsehead) is set against. To me, when I eventually did manage to see it, the Horsehead looked like a place where an indistinct "bite" of IC 434 was missing  I think this is where the H-b filter helps - to tease out this faint HII emission nebula so you can see where it is, and, crucially, the small patch where it isn't. And that is the Horsehead Nebula.

    A UHC passes both O-III and H-b band widths so can help but the H-b just isolates that one bandwith so is a little more of a helping hand with this task. The O-III bandwidth does not seem to help with this one.

    As dark and transparent skies as possible are another very important factor as are eyes that have become as dark adapted as they can be. I even stopped using my Rigel finder for a couple of hours when I was doing serious Horsehead searching. No light at all anywhere near my eyes for quite some time.

    All that to just about visually detect a small patch of blackness against slightly less black, blackness. We must be a little mad :huh2:

     

    • Like 2
  6. I have a Skywatcher ED120 Pro which I love but I have put a Moonlite focuser on the scope and the overall build quality and finish is not as good as my APM, Vixen or Tak refractors. The objective is a very good one though, which is rather important !

    I would think that the TS / Altair scopes are a notable step up in all round build quality and quality of fittings such as the focuser, sliding dew shield etc. I had a William Optics 90mm Megrez for a while (it followed a Skywatcher ED100 as it happens) and I would expect the TS / Altair scopes to be similar to the William Optics level of fit and finish.

    Interestingly, the objectives from the Synta made ED doublet series were used in scopes under other brandings such as William Optics and TS. So we can see where Synta put their effort in with that series.

    Skywatcher did produce a better finished series with the ED doublets in them called the Equinox series. No longer produced now though:

    Skywatcher Apochromatic refractor AP 100/900 Equinox ED OTA

    Sky-Watcher Equinox 100 ED (like an EON) Pending | Astromart

     

     

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  7. Very nice report Magnus !

    I can't wait to get my 12 inch dob out again :smiley:

    You seem to be looking in just the right place for the Horsehead. I've spent quite a lot of time looking at that small patch of sky over the past few winters. Most of the time with no sign of it but when I have managed a glimpse it has been with the H-b filter on the end of the eyepiece.

    Such a subtle and challenging target - probably about the hardest thing that I've ever observed when I think about it.

     

     

     

    • Like 1
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