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Posts posted by symbiosis
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Hi vacuum, thanks for the reminder re the video, I now realise I never got around to editing it and putting it up!
Just found the footage I shot, so I will cobble it together, upload it to my youtube channel, and let you have the link when done
Might take me a little while so please bear with me
Cheers
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Rather limited range of ep's at present. A 20 & 6mm plossels and a2 & 3 x barlows. Any suggestions what else would be worth having? I'm also on the lookout for a motor drive too
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Thanks Ken, yes I found a few guides on mirror cleaning and followed those. The trickiest part was actually releasing the mirror assembly from the tube, there wasn't a guide for for my particular scope and it had a few oddities that others I looked at didn't seem to have. I recorded it so will put up a quick youtube video for anyone else wanting to do the same with my particular scope..
I marked off the center using a (non permanent) board marker pen and then very carefully centered a ring binder circle over that, it was actually not far off perfect alignment when I put it back together so I only needed to tweak it a little.
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Pleased to say that I just tried it out again and (despite the moon being behind clouds) the image was fantastic! looks like the collimation and cleaning did the trick
Thanks for everybody's input
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Yes the mirror was spherical buy surely it should still produce better images than the Celestron?
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The mirror was rather grubby so a clean could only help
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Thanks for the help all, specially Ken
I know have a center spotted and cleaned primary mirror that's also collimated - now I just need a clear night to test,,,,,,,,,,,,
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It appears that my scope DOS'NT have a center mark on the primary mirror. Does that mean I need to remove it and make one on it to use the cheshire method?
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Thanks again, will check youtube
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Guess its possible regarding the cloud
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PANIC! LOl
Thanks again Ken, I will certainly try your suggestions.
Actually, I am feeling a little panicky regarding collimation having never done this before - any good guides for a reflector that you would recommend for a complete novice?
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Thanks for the suggestion Moonshane but I dont think the Tasco reflector has a diagonal
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Perhaps I should also add that I used the same 20mm EP in the Tasco in the day and had it focused in on a few rooftop birds half a mile or so away and it looked fine then
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Thanks Ken, in reply:
1 Are you in focus? Yes
2 Colimation is well worth doing and very easy. Might need to give it a go......
3 Dew/misty eyepiece/main mirror = leave scope outside for longer to cool down and demist itself. None noticed
4 Check eyepiece quality under a lamp checking for defects and dirt. EP gave good clarity in a different scope
5 you are using the wrong eyepiece for the moon. This was a 20mm with a moon filter, also tried with a 6mm and had the same result, clear and sharp with the celestron but very washed out with the Tasco
At the risk of being dumb, I was a bit concerned that I was trying to use a 1.25" EP in a 0.965" focuser but I think the focuser just had a 1.25 - 0.965 adapter ring in it. If a 1.25 EP fitted it, then I guess this wasn't a problem?
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Thanks Roger - interesting points that I hadn't considered. As you say, I couldn't even make out any craters with the Tasco but could see a lot more detail with the much smaller Celestron. Perhaps I need to try it out with some fainter objects
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Hi all
I recently purchased a very cheap Tasco reflector model 302012 (D=114mm F=900mm) with a (fairly decent) EQ2 mount. The scope came with a 0.965 eyepiece fitted in the focuser. The focuser had a plastic ring that came out that appeared to be an adapter to 0.965" from 1.25" - this seemed even more likely as my 1.25" EPs fitted perfectly once I had removed it.
However, when I tried observing the full moon using my 1.25" EP, the image lacked any real detail (compared to my super cheap Celstron 60az using the same EP).
I'm assuming that I should get a better image from the larger Tasco than the Celestron so any ideas what could be causing this? Might it be that it should be using a 0.965 EP (not sure what using a 1.25" EP with a 0.965" focuser would do) or might it need collimation?
Any help much appreciated
Help - Telescope setup question
in Discussions - Scopes / Whole setups
Posted
Here you go, sorry I didnt video the collimation but I can vouch that it made all the difference once I did it
I still use this scope regularly and added a battery focuser and clock drive. It will happily take a DSLR for some basic imaging too!
Hope this helps - have fun!