Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Search the Community

Showing results for tags 'laser'.

More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


  • Welcome
    • Welcome
  • Beginners
    • Getting Started General Help and Advice
    • Getting Started Equipment Help and Advice
    • Getting Started With Observing
    • Getting Started With Imaging
  • Community
    • Official SGL Announcements and Events
    • StarGaZine
    • SGL Challenges and Competitions
    • SGL Star Parties
    • Star Parties & Astro Events
    • Celestial Events Heads Up
    • The Astro Lounge
  • Retailers
    • Sponsor Announcements and Offers
    • FLO Clearance Offers
    • IKI Observatory
    • Supplier Reviews
  • Astro Classifieds
    • For Sale / Swap
    • Wanted
  • Equipment
  • Observing
  • EEVA (Electronically Enhanced Visual Astronomy)
  • Imaging
  • Science
  • WADAS's WADAS Discussion Forum
  • Beaufort Club's Topics
  • Swindon Stargazers Club's Topics
  • East Midlands Stargazers''s Topics
  • Central Scotland Astro's Topics
  • SGL Cumbrian Skies's Topics
  • Herts, Beds and Bucks Group's Topics
  • SGL East Anglian Group's Topics
  • South Leicester Observers's Topics
  • South Wales Group's Topics
  • SGL Surrey Observers's Topics
  • South Yorkshire Stargazers's Topics
  • Yorkshire Astronomers's Topics
  • Devon and Cornwall's Topics
  • West Midlands's Topics
  • Essex Cloud Dodgers's Topics
  • Essex Cloud Dodgers's New equipment
  • NLO and Planetarium's Topics
  • Astronomical Society of Edinburgh's Discussion
  • Dorset Stargazers's Topics
  • Hairy Stars Club (Comets)'s Tutorials and Guides
  • Hairy Stars Club (Comets)'s General Discussion
  • Hairy Stars Club (Comets)'s Observing Campaigns
  • Hairy Stars Club (Comets)'s Analysis results
  • Hairy Stars Club (Comets)'s Useful Links
  • Pixinsight Users Club's Pixinsight Discussion Forum


  • Astro TV
  • Celestial Events
  • SGL Calendar
  • Astro Society Events
  • Star Parties
  • WADAS's Events
  • Beaufort Club's Events
  • Astronomical Society of Edinburgh's Events
  • Dorset Stargazers's Events


There are no results to display.

There are no results to display.

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start





Website URL







Found 15 results

  1. Hi, I have just recieved the last item which was on back order for a couple of months from USA. I already had the Infinity Eyepiece but was waiting for the BlackCat. Everything was ordered from FLO and i was very happy with their service. Instead of writing an essay, i made a video of how I use the tools and how they look, but in short - Theese tools are FAR superior to the Howie glatter, even with the Tublug. /Daniel
  2. So, I have been testing three different kind of lasers, each one is supposed to be the "best" in each category or what you want to call it, the hotech and HG is almost the same, but whit the difference in how you lock it down. The Catseye is very different in how it works. I made a Youtube video of my thoughts https://youtu.be/ERF33hNVieQ What do you think? which one do you use? Regards, Daniel
  3. Hi, I am trying to collimate my astrpgraph, a TS N-AG10 with a Hotech 2" self centering laser and I am having some questions of the clamping procedure. Each time i am trying to tighten the collar so that the laser would tighten up in the focuser, the laser dot is quite far off the earlier spot the laser hit. I have sience bought a Howie Glatter 2" laser, when i adjust the secondary so that the laser dot hit exactly in the center of the primary dot and change laser to the hotech, the laser dot is about 4-5mm off, if I release the Hotech laser and re-tighten it, the dot will hit somewhere else. I can not just trust the hotech laser - has anyone else experienced the same thing? *Both of the lasers is collimated itself at 5 meters distance with the dots not moving at all. /Daniel
  4. 29/01/2015 - 30/01/2015 New toy day - laser alignment tool. I thought the 130SLT was working pretty well until I checked the collimation: way out. There should be a warning that your new scope will be off focus until a laser alignment tool is used and the collimation corrected. So that done I got the scope outside only to have the batteries die. Then I found that my 12V PSU is the wrong polarity. So I got the NiMH fast-charged, and of course the skies clouded over 8/8 with some heavy stuff from the west for the rest of the foreseeable.
  5. 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.
  6. For Sale: Hotech Advanced CT Laser Collimator for 2" Focuser The HoTech Advanced CT Laser Collimator (patented) is a breakthrough in Cassegrain Telescope collimation! Collimate Your Cassegrain Telescope: Without using a star Indoor or outdoor - day or night Focus stays at final view setting Within focal distance from your telescope One-man operation Portable and simple to setup and use Works on CT, SCT, SN Mak, & RC Collimator is in excellent condition having been used on both my SCT scopes. Includes all original parts. Now sold.
  7. Having sold my RC's I have a 2 inch Howie Glatter 635nm laser collimator giving a pencil beam and a second interference filter giving a ring pattern for sale - photo to follow Asking £110 which includes postage to mainland UK addresses.
  8. Selling my laser colimator. In excellent condition. Laser colimated correctly in the unit too. Seven brightness levels. Looking for £21 - £17 with signed for postage included (direct bank transfer), or £18 - £14 cash on delivery if collecting. Thanks for looking.
  9. Please help! I have a NEWTONIAN 150 / 750 SKYWATCHER I am seeing crosshairs and a dot even after LASER COLLIMATION! When i look down the focuser empty I can see that secondary is potentially not PERFECTLY aligned, with a slight "moon crecsent" bottom right but upon mounting the laser all spots and targets line up perfectly! I am at my wits end... PLEASE HELP!! What am I doing wrong?
  10. 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
  11. Hi Guys, Two days ago a mirracle has happened and I received a gift from my miss - the SkyWatcher 250 GOTO!!! (I call him R2-D2 ) My pants are still full of happyness However, during these two days I cannot get focus. I have checked collimation tutorials (without laser, as I have not got one) nad this is what I have (please see the pic). My cap hole is in the centre of the ring of the primary mirror, but it does not look perfect. Is it good enough to get correct focus? or, alrenitevely, - should I try to collimate? if it is good enough, I have no focus on the neighbour house roof top which is aproximately 500 meters away (using 25mm default eye peace). P.S I made a hole on the EP cap and placed some tinfoil inside for contrast.
  12. Hi. During the last Perseid nights at our club's obsy I had to bring my laser, and use it a lot to point various things to visitors. Having other duties as well, I kept the mini lightsaber in my jeans pocket, a habit I took so body heat will protect batteries against draining by cold air. Then, at some point I crouch to pick up something that fell on the ground; that's when I see, out of the corner of my eye, the observatory wall turning lime green for a couple seconds. What was that light? OOOOHHH, it was a giant fireball lighting up the wall, and I missed it because I was looking at the floor! AAAaarr! A once-in-a-decade opportunity, and I blew it! But, hey, how come the guys at the other building didn't yell, if a monster Perseid just passed? ...Oohh, it was my laser switching on by itself, hitting something, and the diffused beam lit up the wall. Not a minute later the pocket lightsaber turned on again without permission, and hit a visitor in the face, close to the eye. He didn't cry, or call his mama or his lawyer, but this worried me somewhat. Even if it cuts no one in half, and gives no fireball false alarms, this laser could stupidly empty its batteries because the exposed switch pushes against my jeans' fabric. I quickly discussed that with another club member who immediately agreed lightsaber switches should be in a safety recess, and once I got back home I made one. It's a simple split ring cut from Mixal tubing (aluminum core between two plastic layers). Three or four O-rings on each side are enough to keep the safety ring in place (man, does fabric leave bits of fibers on everything it touches!): But when handling the lightsaber fitted with the O-rings, I was amazed by the grip not only on the skin, but also on fabric, no chance of the laser slipping out of the pocket! So I added O-rings everywhere the jedi weapon felt slippery; they seemed like too many to my eyes, and to a friend who saw a pic, but handling is judged by feel, not by sight, and this arrangement feels right, so I guess it will also look right after getting used to the novelty. Thanks to the rubber grip the mini lightsaber rests quietly in the hand without having to clench it, neat little convenience when you need to use it for hours, like when we had 60 to 80 visitors during the Perseid week-end). Only the rearmost O-ring needs to be superglued to the lightsaber frame (it looks more like the syfy weapon than a classical pointer with these adds-on), the others can't slip out. If you don't have O-rings to keep the safety ring in place, complete Mixal rings on either side will do the job. Finally, the mod does not void the warranty - a concern if you don't buy the cheap ones - and leaves the warning label readable in case it's needed by law. There you have it, not a great ingenious mod on a great fancy telescope, but this bit of gear will be welcome.
  13. Hello I have been enjoying my binocular mirror mount for a while now, the ScopeTeknix Binoflex ST50, on which I've mounted my 15x70 binoculars. I had already fashioned a mirror heater pad that gently warms the mirror from underneath, preventing dew. I had also mounted a laser pointer, nestled between the two barrels. It's great for aiming the mirror: just turn the laser on and see where the beam goes as you move the mirror. But one thing had been bugging me: the laser quickly gets cold and the beam becomes very faint. So today I made a little heater "jacket" for the laser. I used 6 330 Ohm resistors soldered together in a "ladder", sewn them onto some curtain tape, wrapped everything in electrical insulating tape, stuck some Velcro strips on, added a cable and a phono lead. Now both the laser and the mirror heater can be fed from my PWM regulator, the same one I use to heat my guider and camera optics. The jacket just needs to cover the front inch or so of the laser pointer as that is where the laser diode module is. It's working very well and that means I can continue finding things for as long as I have power.
  14. It's an ED80 with the stock focuser. I think there is some astigmatism somewhere as my stars can be a little stretched and so I want to see if I can use a collimating laser to check if the focuser is in straight. (I'm also going to make a determined effort to get the spacing right between the FF//FR and the sensor, but that's another story). I can't see any threads that get into the detail of lining up the focuser with a laser. If I put the laser in with the target bit facing up, then the red dot that bounces back off of the lens is slightly off centre on the target on the collimator. If I loosen the screws, turn through 90deg, retighten and look again, then the red dot is in a different place and so on all the way through 360 deg. I'm thinking that the red dot should be central (as when collimating a Dob that I used to have). Is that right? It may be that the laser needs collimating, but I'm not sure how to do that. Any advice on whether this approach is going to get me anywhere would be appreciated.
  15. Hi all, quick question. Some Soviet robotic missions and the Apollo missions have left some reflectors on the surface of the moon. They can be used to measure the distance of the moon from the Earth by calculating how long the reflected light takes to come back to you. Is this experiment possible also for us common humans with affordable equipment in the comfort of our backyards? What exact equipment is needed for that? Cheers
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.