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10 mm eye piece problem


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I have a 10 mm eyepiece that when it is in the telescope it doesn't seem to what to see anything. I did spend last night realigning my finderscope, making sure there was no dust on it as I haven't used it in years. in 2001, my mom got me a telescience telescope for christmas and I used it every full moon in the backyard and would get great viewing. I never aligned the finderscope to begin with. But I only have a 10 mm high power and a 20 mm wide view. Most of the time I opt for the wideview. I did use the 10 mm on monday night for the LUnar eclipse viewing. I would get it in focus fine and as soon as I let go the image got fuzzy or dissapeared again. Given how old my telescope is I might be better to upgrading to a better telescope but I am loving the refracting telescope alot. My husband will be getting me new eyepieces and new tripod stand to see if that helps me . I would greatly appreciate any one's opinion on the problem with the 10 mm. 

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What scope are you using now? size and focal length?

Have you adjusted the locking/tightening screws on the focuser? If they are loose then the weight of a lens with the scope at an agnle could cause the focuser to drop back under its own weight

I would normally adjust the finder during the day on a distant target.

.

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To be honest - those Telescience scopes are a bit of a waste of time. The moon is about the only thing you can really see with them - and not terribly well. One UK retailer used to sell them for £25 had to have a clear out getting rid of them for £1 each - which says a lot.

I would plan an upgrade to something a lot better and not waste money on a new mount for it. With the right "proper" scope you'll be able to get the bits for mounting the old one if you still want to - my guess is you won't.

So - best I can offer is - if you can suggest a budget we'll give you a lot of ideas of what to get that will work well for you. :)

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Going fuzzy sounds like the focuser is slipping.

There may be a tensioning screw on it, most likely underneath, which if you tighten up a bit will, or might, prevent any slippage.

Drifting out sounds as if the mount is loose and so moving and losing the target, or simply it is not driven and the target is just drifting out of sight.

A 10mm in a 700mm scope is a mag of 70, and eyepiece will generally have a 50 degree view so at 70x you get about 0.8 degree field.

So centre to edge is 0.4 degree. The earth rotates at 15/hr so to go from centre to edge takes just over 1.5 minutes.

I would guess that the fucuser needs some attention, tightening up a bit being the first, possible a clean.

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well, I have been looking at different telescopes and there are a few that are within a reasonable price range for me . They are decent brand names as well. my budget right now is not more than 150 US dollars, but anything I want to get I know I would have to save up for a few pay periods. After making sure all the screws were tightened and the finderscope was properly aligned, I did have an easier time with the 10 mm eyepiece still a bit of fuzzy image but I take it to there being dust on the inside of the eye piece itself.

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If you want a refractor have a look at the Skywatcher range of refractors. They come in different types and prices from the Star Travel upwards.

I have both a Star Travel ST120 for grab and go and an ED80 for imaging. The Star Travel range start at 70mm objective. They do suffer from chromatic abberation but if you look at the reviews none are negative on their performance.

The ST80 on an AZ mount is very popular. Plus as you are in the US the prices are much keener than the UK and Aus'.

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With this hobby, you almost NEED to stick to brand names. It's the only way to guarantee quality optics, thus quality views. My advice would be to put the money towards a Skywatcher/Celeston refractor. They are very simple to use as they require no collimation, and produce sharper images than that of reflectors (albeit suffering from chromatic abberation - blue/purple halo around brighter objects). This would future proof you for a good while, and would leave you smiling ear to ear after each and every session. Just put some petrol and a match on the "telescience" thing...

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yes I am aware that sticking with more known brands is better. Had my mom actually known what she thought was a passing fancy of mine would be more serious she would have gotten me a better one. My fiance is willing to actually get me a new telescope. He just wants to get the eye pieces first as he promised me those first.. hopefully I can get him to switch it up... 

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