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Hi, I am seeking some information and am hoping someone here can help as I am unable to locate the info on the internet.
I have a Lunt LS50-THa fitted with the Starlight dual speed feathertouch focuser and want to know the thread size and type of the 3 set screws that is used to hold the focuser and adapter together and allow it to rotate. I haven't lost any of them yet but am looking to replace them with something that can allow me to tighten and loosen them with fingers alone (it will also allow me to keep spares and track of those little things).
By Cosmic Geoff
I recently acquired a used CPC800 SCT. I thought a 'First Light' report might be of interest.
First impressions: the tripod is a heavy duty affair with thick legs, a folding lower spreader and a big cast alloy eyepiece tray/steady. The OTA/fork assembly (not separable) is very heavy (21Kg/44lbs) but has a couple of grab handles. You need to be fit to handle this. 😕 (I was seriously tempted not to go ahead with the purchase after trying the weight.)
With the legs retracted it is just possible to pass the tripod through a standard doorway, but it is just as easy to pull up the lower spreader and carry it folded. It is much heavier than a C8SE tripod but more comparable with a EQ5 tripod in weight. Once in position, I checked the level with the handy built-in bubble level and left it. I forgot to screw up the eyepiece tray/upper spreader but I don't think this made any difference.
Scope stored on a table with faceplate down and rear handle uppermost. Took the weight with my left arm, elbow fully bent, forearm vertical. Got it on the tripod which took the weight till I got the base to drop over the centre pin, spun it till something clicked into place and then did up the three thumbscrews. I would not try this with an equatorial wedge unless I had a helper. Celestron also sell a CPC 9.25 and CPC1100 - if I had one of those I'd need a sheerlegs or a brawny assistant.😲
Fitted the visual back (same as C8 SE), prism diagonal (same as C8 SE), straight-thru 50mm finder, handset (Nexstar+) and handset bracket which holds it facing rearwards (a handy feature not implemented on the C8 SE). Fitted a 25mm X-Cel LX that came as an extra.
Connected my new lithium powertank and its DC cable, and powered up. It comes ready (CPC Ready) very quickly. Selected 2-star auto align - it whizzed past a time display showing the time ahead of my watch by 1 hour - more on this later. Aimed at Arcturus and afjusted the finder aim. Selected Capella - it nearly got there and then blackout! The cable had snagged and pulled on the plug. I ran the cable through the side handle on the fork and tried again. (It appears that the CPC's supplied cable has a locking ring and the other end has a cigarette lighter style plug.) Capella ... Arcturus .. aligned. Told it to find Mizar (named star menu). It did.
Also found M48, the Ghost of Jupiter planetary, Gamma Leo (split ), 54 leo, 88 Leo, 90Leo. The scope appears to be collimated and resolution OK. GoTo is just accurate enough to drop doubles into the bottom of 9mm X-Cel Lx field. Even at 200x and a gusty night the view is rock steady. A pier mount could hardly be stiffer than this! And no obvious backlash in use (unlike C8 SE).
Fiddled with the menu, found the GPS is obviously working, and the time set for daylight saving. Corrected it to standard time. GoTo still works.
Teardown: tube horizontal, power off, tube cap on, diagonal off, handset and bracket off, left visual back on and capped it, loosened clutch to point tube straight down. Got OTA/fork assembly off and back indoors on table, twirled it into position. Folded up tripod and carried it indoors. I would not try carrying the tripod and scope together.
Verdict: Very solid mount should be good for planetary imaging. Some nice features not on C8 SE, otherwise same optical performance. Alarming weight.
I am new to astrophotography and am stil! looking to build up my equipment. I have an HEQ5 Pro to go mount and 200pcs Skywatcher OTA.
I want to primarily focus on DSO,s (pardon the pun)
I am thinking about my next purchase and am torn between a postmaster for accurate alignment or a guidescope.
Any advice would be greatly appreciated.
Hi Everyone, need a little help choosing the right flattener/reducer for the William Optics Zenithstar73.
I am after one that does both jobs so that rules out the dedicated Flat73 which is just a flattener!
So I was wondering if I could get away with the Flat6 0.8 reducer which does say it works on scopes 70 - 80mm f/6 but doesn't list the ZS73 in the models list or do I need to spend the extra and get the Flat6A11?
Can anyone shed some light on this have email 365 where I have seen the Flat6 but had no reply.
Thanks in advance.