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By Michael Hogan
I have decided to sell my Cem-120 mount as i got a second hand AP 1100 GTO from my friend who got a new AP 1600 with encoders
its just under a year old bought from Altair Astro so still under two year warranty is in mint cont i couldn't miss the opportunity to get
AP 1100 GTO and let it go still waiting for pier plate for mount.
So theirs no point in keeping two large mounts after i got my dream final mount buyer will pay shipping price is 2150 pounds.
Altair Astro price without Ipolar Camera is 3250 pounds without Ipolar Camera which is 200 pounds total 3450 pounds
By Clear Skies!
I am going to buy Skywatcher EQ5 Pro Go-To mount. But, unfortunately, I am low on budget.
So, does someone know where can I buy the cheapest EQ5 pro mount?
Yesterday there was a low price for it (350 €), but they changed it.
Thank you for your time!
I recently bought a 2nd hand Lunt 50PT Ha (on a different platform). The vendor said he had only used it a handful of times since buying it and it shipped in the original box. It seems fine, focuses well (although I find the helical focuser a bit of a pain compared to crayfords). But it doesn't show any Ha features on the surface of the Sun!
Long story short, I completely opened up the pressure tuner and found a bizarre thing. Its well greased, there's no detritus (and it doesn't lose pressure). But there was only one O-ring in it?! The tuner itself has grooves for two o-rings and the video on Lunt's website (on how to replace o-rings) shows a tuner with two o-rings when it comes out. And they ship replacements in batches of two.
So I'm guessing that somehow the original scope shipped with only one o-ring fitted? (It wouldn't make sense for the vendor to have removed one?).
I'm hoping that's what it is, b/c then the inability to resolve Ha features may just be insufficient pressure building up? In which case, does anyone know where I can get these replacement o-rings please (Lunt's US website has them but that's only for shipping to the US)?
If it's not that, and the scope is only meant to have one o-ring, any ideas on the problem? The ring & tuner seem well greased.
(EDIT: in the meantime, the next time the sun comes out, I'm going to try moving the current o-ring from the higher groove to the lower groove in case that longer distance from the base is why the pressure isn't building up sufficiently?)
We have a fledgling Astronomical Society at my place of work and we're intending to have some telescopes available for colleagues to view the transit of Mercury in November. While the majority will use appropriate solar filters it would be good to have at least one set up for projection. However, we only have reflectors and Schmitt or Maksutov Cassegrain scopes among the members. I was considering buying a small refractor second hand to use for this but thought I'd ask for advice here first.
Which is the best type of scope to use for projection?
What do we need to look out for (overheating & fire risks for example)?
What is the best umbrella to protect kit from the inevitable deluge on the 11th November? ☔