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Found 9 results

  1. I have encountered a unique problem last night while trying to image using my GSO RC6. The scope is well collimated using a long Cheshire as well as a Howie Glatter single beam laser for verification. CCD inspector also gives me good results when checking with an artificial star. However, when I check using a collimation cap the innermost shadow looks offcentered as well as when I pointed the scope on a real star yesterday (Alp Libra) as well as Spica, it showed a crescent shaped star. This I found to be really weird. Anyone have any idea whats happening here? I live in Bangalore, India, so there's virtually no cool down time required. The temperature gradient between outside and inside is very little if any.
  2. Mint condition Farpoint 1.25" laser collimator and Cheshire eyepiece kit. Comes with mirror center spot mask and three remaining center spots. £55 posted Paypal only.
  3. Having a clear out to fund a feather touch microfocuser for my edge. Baader diamond track SCT (lovely but a bit too heavy ) £180 2 months old , as new.-----Sold elsewhere --------------------------- ZWO asi120MC £80--------------------------------------------Sold to charl, Many thanks. William optics 2" extender £18 --------------------------Sold to Adrian, Many thanks . FLO premium Cheshire £18-------------------------------Sold to Ultramol , Many thanks ----------- Postage £6 each item PayPal / cash meet up around M25 / 127 area.
  4. I'm scared I have attained the debilitating Collimation Syndrome ( HClV-1a : Human Collimation Virus strain 1a. - mild/severe). Was out with Calpernia yesterday (ehm..my scope's second name..) and I decided to correct her eyesight..again.. (She's now 11 month's old...her first name is Sky, her surname Watcher, 10" of joy..) I followed my baby's collimation guide (I mean Astrobaby..sorry..) And to my surprise the collicap worked (which I have never tried before) very well... I could see all the six mirror clips on my primary mirror..but it seemed like the clips were not evenly spaced with reference to the side of the secondary mirror's edge. As explained in AstroBaby's guide.. "The photograph to the left shows what the actual view should be like at this stage of the process. Note the three mirror clips are all visible and are all equally close to the edge of the secondary mirror and the secondary is showing round and centred to the focuser tube ( the dark area at the edges of the picture)." (Astrobaby, 19..) source: http://www.astro-baby.com/astro_baby_telescope_help_and_advice.htm. Collimation Guide for Newtonian Reflector Telescopes. I checked with my Cheshire...it showed that (according to the Cheshire) the secondary didn't appear quite cylindrical in the tube. So now I recollimated the whole thing...using my trusted Cheshire...and everything is bang on.. When I insert the colli cap thereafter I can see all the clips, almost all the same size, but still with a slight miscorrection of spacing around the secondary's edge.. Maybe I'm just getting old, and my eyes are tired..
  5. Hi everyone, I recently got myself a GSO 6" f/4 astrograph, but seems like the secondary mirror was quite off. I then tried collimation using Astro Baby's tutorials, and others around the net. I've had a few Nets during the past 20 years, but this one seems to be a bit of a pain to get right. The secondary holder is a bit stiff. Anyone here done any mods for the scope and have reasonably good performance? I'be attached an image with Mire De Collimation circles. Image shows the reflection of primary, followed by the edge of secondary and followed by the grey card placed behind the secondary, which ends with the focuser tube. Any help will be appreciated. Edit: If I were to move the secondary towards 2'o'clock position, could it solve the problem?
  6. Couple of collimator devices no longer needed: Cheshire EP (long type): £12 inc UK P&P Laser collimator: £8 inc UK P&P SOLD Kev
  7. Now in it's 5th year This event is a non profit event and in previous years all profits went towards us working with young people disengaged from education. This year all profits will go towards astronomy outreach in the North West of England and the profits will be divided up between all clubs and societies who participate at the festival by way of a stall/outreach.
  8. Furious pez

    New to this

    New to this just bough my first scope the orion funscope,while i have always bin into space and alien conspiracys etc but thats another post anyway im new to star gazing with a scope and hope to be a active member on this site and looking forward to picking peoples brains especially when it comes to branching out on a more expensive scope so guys hope to talk to you all soon by the way i will only be doing planetry observations for the start
  9. For Sale: Unused FLO Premium Cheshire Collimating Eyepiece https://www.firstlightoptics.com/other-collimation-tools/premium-cheshire-collimating-eyepiece.html The essential accessory for anyone owning a Newtonian telescope. This premium combined Cheshire Collimator with Sight Tube is manufactured for us here in the UK to a very high standard. Beautifully machined and anodised with a clearly etched cross on the target face and a precisely centred wire reticle The sighting tube’s narrow field of view and crosshairs provide a centring reference for the telescope’s optical elements. The Cheshire eyepiece has a means of providing illumination to a target face (set at 45 degrees to the illuminating hole) that will be used to collimate the primary mirror. NOW SOLD
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