7/24/2023 0 Comments Pirate telescope blurryOver the years, improvements in lens technology led to the development of catadioptric telescopes that employ both lenses and mirrors. In 1668 Sir Isaac Newton created the so-called Newtonian reflecting telescope that consisted of mirrors instead of lenses. Note that spectacle-maker Hans Lippershey was credited as the inventor of the telescope and Galileo Galilei as the scientist who pointed the telescope towards the skies. Telescopes have undergone significant transformations since the 17th century – or when the first refractor telescope was invented. Portable and Handheld Telescopes: Introduction Balances, Scales and Weighing Equipment.At some point the moon should come to focus but if you go too fast you can easily overshoot the focus point. Turn the focuser knob very slowly across it's full range of travel outwards and inwards. If all that is correct - then pop the 25mm in the draw tube and point at the moon. If it's twisted round to face the side of the tube at all then the view will either be distorted or there won't be a view. You should also see a small circle in the center of the primary mirror and three mirror clips on the circumference of the primary mirror.Ĭheck if the secondary mirror (the diagonal one at the top of the tube) is square on to the draw tube. Take the eyepiece out and look in the drawtube - you should see the reflection of your eye from the primary mirror. When you turn it the other way it should turn right up to the telescope.Īre you sure you only have a single eyepiece in the draw tube? There should be no extension tubes or barlow lens in between eyepiece and draw tube. It should extend up to about an inch and a half or two inches. ![]() When you turn the focusser knob do you see movement in the draw tube? (ie does the eyepiece move in and out when you turn the knob?). ![]() This scope sounds like it isn't focussed correctly. Other than that, not really sure or experienced enough to comment. The stock lenses, could be an issue, mine came with an image corrected 20mm and a stock 10mm, didn't care much for either but they did work and I got relatively clear images of the moon on my first night before changing them, check and see they look clean, not damaged etc. ![]() From memory you should have a range of about 3" (guess!!). It may be worth checking to see if these are aligned so the focuser is actually moving. I don't think the focuser has a lock nob on it like the skywatchers do, its a moulded plastic affair, two screws underneath to give access to the cog that turns the rack of the focuser tube. My Scope was new out of the box, it was a little off but not that much. The instruction book on page 28 has a picture showing this. To check the collimation, very rough and ready, take all of the caps off, don't put an eyepiece in, look down the focuser, if the scope is somewhat in line you should be able to see a reflection of your eye in the mirrors which are all central. I didn't have any trouble with focusing but there are a few little tricks to check if its collimation or the focuser. I had an astromaster 130 a few months back, it's not a bad starter scope at all. The telescope (Celestron Astromaster 130 EQ) is brand new. I was trying to do some terestrial viewing and tried doing it last night when trying to look at the moon. I left my eyepiece cover on last week because i was in a hurry to change eye pieces while looking at the moon Had to scratch my head for a min till i realised what i'd doneĪlso have a look inside the tube, you never know, could be a bit of packing material in there or something Some times we can miss things when we are excited to get out and view. This will give you a chance to check over everything again in day light. ( Just be very careful not to point it any where near the sun!!! and keep the scope covers on (including the finder covers) if you have to leave it for any time) You will need a pretty far target to get focus on, say around 50+ m away. ![]() Its kind of late now, but maybe you can try it during the day with the 25mm eye piece. really), but if new then usually spot on. What were you looking at? was it a star or a planet or the moon, or just everything you tried to look at was blurry?ĭid you buy it new or used? If its used it could need collimated (sounds painful but its not. When you try to focus, does the image appear to be getting sharper but just doesnt reach focus or is it just always blurry? Or does it appear to get sharp then just begin to blur again as you adjust the focuser?
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