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I'm new to this forum but not particularly new to astronomy.
Anyway, I have an issue and I'm hoping that there is someone here who can help or at least point me in the right direction.
I have a celestron advanced VX which I have now owned for probably 5 years or so, I lost a bit of interest in astronomy so all of my equipment went away and I have just recently started it all up again.
Iwas powering the mount using an RAC heavy duty jump starter, which, admittedly, I haven't been keeping on charge! So there is a fair chance it is dead/on it's way out. So I purchased a talentcell 8300 from Amazon, it arrived today (12th) and I plugged in straight in to the mains to charge up, as soon as it was fully charged I plugged it in to my mount and nothing, literally nothing at all, no lights, no reponse, it's as if I had not plugged it in. So I plugged one of my RAC units in, one of them, when fully charged, will power the mount but not fully, the power LED comes on but the backlight on the HC does not and all I can see on the display is "boot start".
I then tried to power the mount via the same 12v cable as I was using from the RAC units but with the power pack plugged in a charging too, this all worked exactly as expected, everything turned on, I can input into the HC and the motors all respond to input. I have noticed that the power LED on the 12v cigarette connector does dim dramatically as soon as I turn the avx on (when plugged in to the RAC pack).
I purchased the talentcell unit as I had noticed on other forums that people were using it for the same mount, it is rated as 12v and 6A output so all should be ok. I have not had a chance to check anything with my multimeter, and, honestly, I'm not that handy with one!
Any help would be greatly appreciated
Hi - I'm a relative newcomer to telescopes with goto - still trying to figure them out.
I have a problem with Goto on the 8SE.
Alignment usually works (Not always, but usually)
I believe my set up is correct - time and date, DST and UTC (It's currently BST in the UK)
I usually use 2-star alignment (Currently, most convenient for me are Sirius and Procyon)
Alignment usually succeeds, but goto just doesn't. The scope slews away, sometimes even to a completely different part of the sky from the selected object (I'm familiar enough with
the sky to be able to identify several bright stars without assistance)
Bizarrely, this happens even if the goto object is one of the alignment stars - how could it possibly not be able to find a star when you've explicitly told it where it is?
I've read that goto sometimes doesn't work well on battery power, so I've aquired a mains adapter. No change.
I haven't yet updated the handset firmware (I'm waiting for a serial-usb adapter.)
Any help would be appreciated.
Because of the current situation, I have, as many of you guys probably have too, spend a lot more time under the stars when possible.
It has literally been over a year since last I was out doing some astrophotography because of work.
So here is my second take after the long break, NGC 3344 (The Sliced Onion Galaxy).
Initially I thought it would be a lot fainter than it was, so it was basically a shot in the dark, of just trying to get back at doing this.
But the final image actually showed a lot more detail than I would've hoped for!
Spring lent a lot of clear night, but those seems to be gone already. I would've hoped for a few more hours to add some more luminance data to it, as I did have to push it quite a bit.
I am not too happy with the shape of the stars either. Guiding was not very stable through the night, even though balance and polar alignment seemed to be good. Might need to update my Celestron PEC data?
Any advice or feedback is very welcome! 🤩
NGC 3344 (Sliced Onion Galaxy)
Luminance - 13x16 min
RGB - 2x16 min each
Flat and Dark calibrated
Total Integration - 5 Hours 4 minutes (LRGB)
Celestron AVX Mount
ZWO ASI 183MM-Pro
Baader 2'' Neodymium Filter
Baader 1,25'' RGB Filters
ZWO Mini EFW
Explore Scientific Coma Corrector
ToupTek Camera G-1200-KMB Mono Guider
Orion Mini 50mm Guidescope
Deep Sky Stacker
By Geordie mc
Hi. Just starting to use autofocus with the Celestron motor focus and SGP. Can anyone give me some starting points for step size, backlash etc. I’m getting there but wasting a lot of imaging time just trying to get this to work accurately. I’m currently trying a step size of 75 and a backlash of 50. Any tips most appreciated.