Please could you help me?
I recently purchased a Bresser Safari 20-60x80 Scope and I am very pleased with it's performance. However when adjusting the zoom the other day I found it to be a little stiff and so removed the outer casing of the eyepiece. On doing this, a small gold screw fell out and I haven't got a clue where it came from or how to put it back.
I have replaced the casing and I can adjust, but I am concerned about this screw and that I may have displaced something.
Maybe if I could see a drawing/ diagram of the eyepiece compnents I could replace the screw myself, but my concern is that my Scope may now not be at optimum performance, albeit looking through the Scope appears ok.
Please could somebody be so kind as to advise?
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All of Meade's manuals are on this web site-- however this scope is only sold in EUROPE--- there may be one similar to it on the web site below which you can use to help you assemble it.
The manual only has assembly instructions. It will not tell you how to find objects in the night sky--- or how to focus the telescope--- or which eyepiece to use. All this comes with experience and by talking with other amateur astronomers. Find a local Astronomy club and JOIN--- the members will help you--
Meade's manual web site: http://www.meade.com/manuals/index.html
This is a small refractor telescope. Sorry no manuals-- BUT Meade scopes has a web site with all of their manuals. Look under the REFRACTOR heading for one that is similar to your scope. They all assemble and are used in a similar fashion.
First WHY would you use a erecting DIAGONAL in a reflector style telescope. Upside down images are completely normal for an astronomical telescope. You only need this diagonal for terrestrial viewing NOT for star gazing. ALL astronomical telescopes show upside down and or inverted images- it's completely normal.
If you cannot come to focus with the erecting diagonal, it's probably because the diagonal moves the eyepiece too far OUT away from the point where the scope comes to focus. Again-- you do not use those for night time sky viewing. Just stick the eyepiece directly into the focuser.
The eyepiece size (diameter) is the standard 1.25 in. Erecting eyepiece adapters can be used with this scope. maximum magnification is 250x therefore highest eyepiece would be 3.6mm most useful magnification of any scope is 150x (900/150= 6mm eyepiece Eyepieces provided with scope (Huygens type) have a narrow field of view and are relatively poor for astronomy but should be fine for terrestrial viewing
The power of the scope will be the focal length of the main objective (yours is 800mm) divided by the focal length of the eyepiece, so a 9mm eyepiece will give a higher magnification (and be dimmer and harder to focus and find objects) than a 20mm eyepiece. It is usual to have two or three different focal length eyepieces for viewing different objects.
Starting out, you want to use the lowest power, so the highest number, eyepiece. Do NOT use the Barlow lens if one came with the scope. Try it out during the day (but never point a telescope anywhere near the Sun). This will make it easier to find the focus point. There is a very wide range of movement in the focus mechanism, because different eyepieces focus at different points, but the actual focus range for any eyepiece will be a small part of the overall range afforded by the focusing mount.
It is unlikely that the finder scope will be much use in pointing the telescope until you adjust it to precisely line up with the main scope. Most manuals recommend that you do this in daylight, by pointing the scope at an object on the horizon and adjusting the finder to match. Once you have a tree or mountain peak in the center of the main scopes image, you can then adjust the screws around the finder scope to get the crosshairs centered on the same object. It is very difficult to do this job in the dark, especially as objects in the sky are constantly on the move.
Remember that astronomical telescopes usually show an upside down image. There is a good reason for this- erecting the image needs more bits of glass in the light path, which reduces the amount of light and increases aberrations. Even if this is only slight, astronomers prefer to avoid it, and they don't really care which way up the Moon or Jupiter appear. It is possible to fit an erecting prism or eyepiece to most astronomical telescopes, and some of them come with one.
This is a reflector style telescope. The MIRROR is in the base! Light enters the front near the focuser and goes down the tube and bounces off the mirror and back to the front and through the eyepiece. The EYEPIECE end is pointed up.
Your scope TUBE should look like the reflector telescope on this web page:
The moon is big so use the 25mm. The Barlow will have a multiplication marking on it 2x 3x etc. A 2x Barlow lens will effectively double the power of the eyepiece you are using. Do not use the erecting eyepiece for anything other than land viewing. Erecting eyepieces generally reduce the amount of light reaching your eye and thus reduce brightness of the faint objects in the sky. So basically just place the 25 mm lens in the focuser and point the scope at the moon and you will be amazed at what you can see and how bright it is.