Question about Orion Optics
There is some grease from the focuser that leaked onto the primary mirror near the central aperture of the primary mirror - this creates ghost immages near the middle of the field of view when looking at bright objects like Jupiter - I just want to remove the Maksutov corretor lens WITH its black plastic ring that it seems mounted into - in principle I could then reach into the OTA and gently wipe the grease from the primary with a mild solvent ...
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Posted on Jan 02, 2017
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The bit of information I can find on this model tells me this scope is probably a Newtonian reflector Telescope.
The following is the most basic steps I can think of to get you in the driver's seat.. by doing a few simple internet searches in regards to astronomy.. you should be able to greatly expand on my few simple tips.
The primary mirror is at the bottom.. the heavy end.. of the tube... if you can see screws holding it in place... resist the urge to "tighten them up".. doing so will probably misalign the mirror.
You should have a small finder scope mounted on the side
Near the finder scope will be the eyepiece/holder with focuser.. all this should be closer to the skyward end of the scope than the earth end of the scope.. so to speak.
As you peer into the eyepiece you are basically looking at a right angle to the primary mirror into a smaller secondary mirror which in turn is reflecting the image of the primary (bottom) mirror. By adding various eyepieces with different magnification factors you are enlarging that image.
Most folks don't realize how bad a typical looking glass mirror is..but if you look really close at the old bathroom mirror.. you will see how much the glass distorts the image reflected on the silver coating.
Which is why your telescopes mirror has a top coating of silver on the glass.. not behind the glass..
To get started..
I suggest doing all of the following things during daylight hours or near dusk on a clear nite so you can see what you are doing.. to get familiar with the scope.
Using the lowest powered eyepiece you have.. once inserted into the focuser .. aim the telescope at an object a few hundred yards away and attempt to focus..
Remember that everything will be upside down.. looking at the moon, planets and stars..it won't really matter.
Once you have managed to point and focus easily.. you can align your finder scope.. again.. using a fixed terrestrial target
Aim the scope at this object.. the further away the object is.. the better.. get the object as close to center as possible.. slightly increase the magnification if you have a stronger eyepiece.. if not.. proceed.
Fix the scopes position by tightening any set screws on the mount.
Check the position of the spotted object again ..make adjustments until you have the object centered.
Look through the finder scope.. adjust the mount screws until the object is centered in the crosshairs..
Check all settings.. your done.
Start out looking at the brightest objects in the nite sky using the lowest magnification..
Once you become familiar with how to find/spot and focus on simple bright objects.. like the moon and perhaps Jupiter... you can read various articles at websites such as Sky and Telescope to learn how to properly align your scope with the polar (north) star.. of course this depends on the type of mount.. and drive if any... Or simply enjoy point and look backyard astronomy.. some of my most fun star gazing has been using bincoulars.. a star chart.. and a lounge chair.
Remember to keep it simple at first.. be ready to dress warm.. and take your time.. your eyes will need almost 30 minutes to really adjust to nite vision..in this cooler weather it helps to let the scope cool down for a while outside (covered) to keep things aligned properly.. of course the darker it is the better the view..
Even inexpensive scopes can give a lot of satisfaction to a point... especially if it's your first..
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