I purchased a Tasco telescope recently,putting it together was the easy part,i just wanted to know what lens i put in the scope to view the moon?The telescope came with a HM25mm,H12.5,SR4mm eyepieces,and i already know the Erecting eyepiece is for horizontal viewing,and the Barlow lens i think is for making the eyepieces more "powerfull".I just don't know what to use and how to put them in the scope.Maybe if you had a diagram or something it would really help.Thank You
Re: what lens do i insert into scope to view the moon
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.
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1. During the day, point the scope towards an object and align the finder scope to the telescope. 2. First object at night should be the moon. it will verify your finderscope alignment and you should have a clear view of the moon. 3. Use your lowest power eyepiece (largest number in mm) and point the finderscope to a star. The star should be in the center of the eyepiece.. If not, adjust the finder until it and the scope are centered. 4. You can use your higher power lens on the star nd it should still be in the FOV (field of view) 5. Scope may need to be aligned (collimated). Instructions on this should be included with the scope
Hi Joe, I'm Mark. The small scope on top of your big scope is called the "finder" scope. Probably 2X or 4X. It should have cross hairs in the view. Find the moon with it. It will also require focusing but since the moon is bright, you can get an idea where it is in the lens by that. Next. Find the LOWEST power eyepiece to insert into the lens holder. And rotate the focus knob. Hopefully, you will see some bright blurry thing and then you can focus on it. After you get it in focus, put on a more powerful lens and look at the craters on the moon. Note: You will need to adjust your telescope to the earth's rotation. Your scope should have instructions for accomplishing this. Hope this helps, Best, Mark
Originally around $150 new. This is a wide field, low power scope. Good for the moon fair to good for planets and fair for deep sky objects (Orion Nebula and some clusters will be fine) Expect to see Jupiter and its moons but unless it is a perfect night, no detail of Jupiter's clouds. Should see the rings of Saturn also. The scope comes with Tasco eyepieces, which are close to junk but at least they are in 1.25 in format. You can buy better eyepieces and they will work with any upgraded scopes, if you catch the astronomy bug. The optics are fair, Tasco is not known for good optics. I would study up on collimating your scope, I guarantee you will have to adjust it.
I'm not sure what type of telescope this is (refractor, reflector, etc.) but it's normal for most telescopes to have inverted images. There is no up or down in space so it doesn't really matter when you view an astronomical object. You just want to keep that in mind if you use a moon map so that you can get the correct orientation. However, you can get moon maps with inverted images.
If you wish to view land or terrestrial objects you can purchase an image erecting prism to turn everything right side up. Depending on the telescope it may reverse the images from left to right when it does this.
There are only two types of telescopes --- REFRACTORS, and REFLECTORS-
The refractor has a lens on the front of the tube and you insert different eyepieces in the back-- the larger the number written on the eyepiece the LOWER the magnification-- (DO NOT USE THE 2x or 3x barlow which you may have!-- this creates too much power for this small telescope!-- put it away and never use it!)
A reflector has a main mirror on the bottom of the tube, and a small secondary mirror under the eyepiece hole (focuser end) - front end-- put the lowest power eyepiece into the focuser.
Now with either type telescope go out side during the day and practice focusing on a distant object-- turn the knob SLOWLY. At night the moon should be the first target you try.
If you received what appears to be a smaller telescope -- that is the finder scope-- attach it to the top of the tube on the main telescope. Again during the day line up the small finder scope with the main scope-- look at a distant telephone pole (the very top-- and center this in the main telescope. Without moving the main scope use the finder scopes "screws" to adjust the cross hairs so they are pointing exactly where the main scope is pointed. Now you can use the small finder scope to point the telescope in the exact direction--
What eyepiece do you have in the scope when trying to view the sky? (in mm) I recommend starting out looking at the moon with the largest eyepiece you have (25mm, 20mm etc.). It is an easy target and is very impressive. Stars tend to look pretty much like little points of light in a refractor such as this anyway. Pretty boring. Try Jupiter after you've got the moon down. You can work your way to Saturn's rings after that.