Question about Bushnell Optics
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Posted on Jan 02, 2017
SOURCE: garage sale purchase
This is a small telescope.You will get limited views with this scope.However you will be able to see the craters on the moon and the rings of saturn.Although they will not have any detail.You will be able to use it as a terestrial scope.For that it is ideal.You will need an erecting lens to turn the view right side up.You need atleast 1 eyepiece,finderscope,erecting lens(for terestrial views)and maybe a barlow lens.Keep in mind it is not magnification you are looking for it is the ability to gather light and a 50mm is not going to gather much.the bigger the objective lens the more light it will gather.Think of animals that come out at night,their eyes are bigger than those that are out in day light.Because the bigger the lens the more light it gathers,so magnification only plays a part if you can see the target with your light gathering ability.Because just like 1000x0 is 0 the same gos for telescopes.1000xblack is black..
Posted on Sep 15, 2007
I answered your question already-- TURN THE SCOPE around you have it mounted backwards! The eyepiece end is pointed UP. Like the picture above in your question.
Posted on Jan 23, 2010
SOURCE: Bushnell 18-1560 Telescope
What you have is called a refractor-type telescope with the primary lenses (the Objective) at the top of the tube and the only other lenses in the system are your selection of eyepieces, probably a barlow lens (2X magnification of any eyepiece used), and a diagonal (in line mirror so that you cand see into the telescope from the side.). As the focal lenth of the eyepiece decreases, so does the distance away from the Objective Lens. I believe that you are using the telescope with a diagonal mirror which makes the optical path longer. The fact that your longer focal lenght eyepiece can focus and not your short one would be only if you didn't have the diagonal or the eyepiece all the way in tight to allow the focus mechanism (rack and pinioin) to get compressed enough to focus. Look at the Moon, if the image gets smaller then bigger as you focus, but not sharp, then I would have to tell you that your eyepeice lenses are not in the right order. Someoner may have taken it apart and didn.t put them back in the correct order. The lenese could just be very dirty also. Barrow a short focal lenght eyepice from a friend and see if it works in your system. Then you will know for sure.
Posted on May 31, 2010
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