Recently Browsing 0 members
No registered users viewing this page.
So I picked up a classic... a 1970's - 80's edmund optics f6 150mm newtonian...
... like this one but mine has a different mount. It was cheap. Very good condition. The focuser is pants. The mechanics of the secondary holder is (IMHO) brilliant and apparently the primary is 1/10th wave.
But its f6 and I trhink I'd rather swap it out for a faster synta f5 mirror. . The thing is its a one shot job bc to make the f5 mirror work I will have to saw off a good few cm from the barrel of the scope.
So the question is: Is a high quality f6 mirror better than a faster synta f5 mirror for wide deep space astrophotograhy?
All comments gratefully received. 😉
Skywatcher 150/1200 f8 planetary Newtonian.
Bought this originally intending to set up a planetary rig but circumstances call for sale.
Will come with eyepieces and a collimation eyepiece. Not used by myself and has seen very little use. Mirrors in good condition
I have been trying to get my SW 250P (f/4.7) to the best possible collimation as I couldn't manage to focus on any of the planets so far. I just collimated the scope to ready it up for tonight's session. Your feedback is much appreciated!
By Cosmic Geoff
With reluctance I am looking to sell my 200mm aperture f5 Helios Newtonian OTA. (Helios is a brand that became incorporated into Skywatcher - this closely resembles Skywatcher OTAs)
The Helios is offered with single speed rack & pinion focuser, tube rings, 22 to 1.25" adaptor, dovetail bar and grab handle for £90 o.n.o. In good condition except that the dovetail bar appears to be discoloured by exposure to sunlight.
I have not used the telescope for many months and with a persistent problem in my right arm my enthusiasm for moving heavy kit around has diminished.
Buyer to collect from North Bucks.
Offered as option with the OTA: EQ5 mount with RA drive + 6 volt sealed lead-acid battery +charger + standard and extra long Dec slow motion manual shafts. £150. Condition - used but working.
If I sell the OTA I will be looking to dispose of its accessories:
9x50 Skywatcher straight finder - in excellent condition except that the small plastic dust cap is missing.
Cheshire collimator, boxed, as new.
Helical fine focuser, range 10mm, ID 1.25", screws into 2"adapter.
3x Datysun Barlow, as new, boxed.
Widefield eyepiece, 22mm f.l., 30mm body (note not 1.25") with built in focus, works well with this telescope.
Plastic collimation cap (no cost).
This bundle would cost around £114 new - offered if bought with scope at £75 o.n.o.