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Darth_Vader

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About Darth_Vader

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    Nebula

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  • Location
    Derbyshire
  1. I cleaned the mirror after reading the "Andy shot glass" guide... There is a link on here somewhere! Basically I soaked the mirror in a bowl with the tiniest amount of detergent added. I then rinsed the mirror with HOT water and repeated this several times until all the debris had been rinsed away. I then soaked the mirror in the bowl again and used cotton wool to clean. I did this by drawing the cotton wool from the centre of the mirror to the outside edge WITHOUT putting any pressure on the mirror other than the weight of the cotton wool. When finished I rinsed the mirror with HOT water again so that there were hardly any droplet left on the surface. Any drops present were "wicked" off using the corner of some kitchen towl! I did plan to rinse further with surgical spirit, but when I inspected the mirror closely I couldn't detect any sort of streaking, so decided not to push my luck!
  2. Also new pedestal mount has been fabricated... I have tried the scope a couple of times using an old rickety workbench to support the mount. Now I have a bespoke pedestal fabricated from materials in the scrap bin! So far the expenditure on this scope has been £2.55!!!
  3. Haven't done much to this scope in the four months I've had it. But have finally cleaned the primary mirror and performed an alignment with the aid of a hole drilled in a 35mm film case. Finally got outside with it last night to see how it performs. With no pedestal I bolted my mount onto my black and Decker workmate, pointed the scope at Polaris (kind of) then went in search of Jupiter... AND WOW! I have never seen the Galilean moons before and with the Barlow lens in place I could clearly see dark and light lines on the disk of Jupiter! I am well chuffed! Now I know the scope is functioning OK I will get my finger pulled out and get a pedestal fabricated as it was all a bit wobbly last night
  4. Thanks all for the responses... Hopefully I will get time to look at the mirror close up sometime during the weekend. From the comments above I guess that there is no real need to worry about the concentration of the IPA. Unless of course I am talking about the Marstons variety
  5. Hi, Sorry for posting when there are already loads of threads discussing primary mirror cleaning, BUT... I have read the technique suggested here -> Andy's Shot Glass - Clearning telescope lenses and the primary mirror. The final stage of cleaning suggest rinsing with distilled water with a couple of capfuls of rubbing alchohol... HOWEVER it does not say what volume of water to mix the IPA with. Therefore I do not know what concentration I should be aiming for. Has anybody used this technique with any success? Cheers DV P.S. The primary really does need cleaning. The scope has stood for the best part of 2 decades in an upright pisition with NO cap!!!
  6. Hello and thanks for the feedback. Plan is to get the mirror clean and get the scope collimated. Then I will see how it performs as it is... As I am new to this star gazing lark the first target will be the moon. If all is OK then I plan to get a pedestal fabricated, maybe then look at options with the focusser and perhaps even replace the tube, which has been damaged and repaired with a aluminium plate. Plus it is nice to have an idea about the origin of the mount and I plan to look out for Franks book on telescopes.
  7. I have now put some pics of the telescope into the begginers section. Feedback and constructive criticism welcome!
  8. Hi... I thought that I would post pics of the telescope that I have recently aquired. It is a 6 inch reflector, which has stood unused for many years. It has screw in type mech and threaded eye piece/barlow lens. The telescope was being thrown out from the science department of the school where I work. As I have been hanging my nose over a telescope for a while I thought that I would rescue it from the scrap pile. So far I have knocked the surface dust from the outside of the tube and have cleanded up the mech of the mount. Please excuse the vice in the pic, there was no tripod with it, so one of the first jobs will be to fabricate some sort of pedestal. The main mirror is filthy and collimation is way out, so they will also be high priority jobs.
  9. The mirror is definitely in need of a good clean. I have already looked at the guide on www.andysshotglass.com and I fully expect it needs collimating. Am located in Chesterfield so not too far from dark spots
  10. Thanks for the messages, unfortunately there is no information plate. Some time during the past the tube has been repaired and treated to a 'nice' brushed gloss coat, which now looks like tipex! First target will indeed be the moon. I have already downloaded a lunar map and list of targets.
  11. Hello, Just thought I would post a message to say Hi. I have registered as I have recently aquired a telescope free of charge and I am in the process of figuring out what it is and whether it is useable... So far I can tell you that it is a reflector telescope with a 6 inch mirror. The tube length (for mirror to eyepiece) is 3 1/2 foot. The eyepiece is a 1 1/4 inch screw in type and has a barlow lens. It is pretty old and has probably stood unused for the best part of 2 decades!!! Which I guess is why it was being tossed out. I 'saved' it from the scrap heap as (from my limited knowledge) all of the optical parts look useable. I also got the mount, which was thick with dust. But after a quick clean and lube seams to be functioning OK! Just need to know up some sort of pedastal/tripod and then see how it functions!!
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