First of all, your telescope focal length. The magnification you will get for your telescope is given by:. To look at planets like Jupiter and Saturn, you will need a magnification of about ; with that you should be able to see the planets and their moons. If you want to look at the planet alone with higher resolution, you will need a magnification of about So one idea would be to get a 17 mm and a 13 mm eyepieces, along with a 2x Barlow lens.
The Barlow lens will decrease your focal length by a factor of 2 meaning you will get a magnification twice as large for your eyepieces. So the combination of the two eyepieces and the 2x Barlow lens will give you focal lengths of 17, 13, 8. There are other very neat things to look at in the sky like planetary nebulae and star clusters.
For clusters of stars you need a lower magnification. But your telescope should have come with something like a 25 mm eyepiece which enables you to observe such objects.
The good news is that you will not need to buy two different sets of eyepieces, one for stargazing and one for astrophotography. If you have good quality eyepieces, they will do just fine if you want to take pictures. Jagadheep built a new receiver for the Arecibo radio telescope that works between 6 and 8 GHz.
He studies 6. These masers occur at sites where massive stars are being born. He got his Ph. What kind of eyepieces do I need to look at planets? Not only does it double the magnification of any 1. Basically, you can use the t-ring adaptor to attach a telescope, like a long telephoto lens, directly to your camera. You can also, with an additional t-ring thread, use it to double the magnification of any lens or telescope with a camera.
Maybe your starter scope came with two or three low-quality eyepieces, or a more advanced telescope may have come with just one really good quality eyepiece.
It may just be that you want either more, or even less, magnification. Better quality optics and a wider choice of magnification options are the reasons most astronomers quickly upgrade their eyepieces. Many people mistakenly think the telescope and its size is the main factor of magnification.
The focal length of your telescope is typically measured in millimeters and is the clearest indicator of the power of your telescope. The longer the focal length of a telescope, the more powerful the scope will be, the larger an image and the smaller the field of view. A telescope which has a focal length of mm will have twice the power but half the field of view of a mm telescope. You may see celestial objects bigger, but you will see less of them.
The eyepiece at where your telescope focuses will determine the magnification of your telescope. Just like the telescope focal length, the focal length of an eyepiece is also measured in millimeters.
The 1. An eyepiece with a smaller focal length will give a higher magnification on a particular telescope. For example, an eyepiece with a focal length of 10mm will give a x magnification on a mm focal length telescope. A 20mm focal length eyepiece will only give 50x magnification on the same mm scope. A longer focal length of the eyepiece will give less magnification but a wider field of view. There is also an upper limit to the magnification of a telescope and if you push over it, the result may be a blurry and poor image.
March 11, 0 Comments. January 20, 0 Comments. January 06, 2 Comments. We will match any online price that we confirm as valid. The item must be the identical item, brand name, size, weight, color, quantity and model number. It must be in stock at the time of Price Match for us to make a guarantee. No rainchecks will be issued for items out of stock at OPTcorp. We do not price match competitors if they are out of stock.
Browse brands. Share article. George September 09, Hi. By Brian Fulda. July 21, 2 Comments Read. Meet the OPTeam! Mack Murdoc, mackmurdoc on Instagram, shares the inspiring moment that got him started in astrophotography and a few of his favorite images.
Learn more about his journey here! March 11, 0 Comments Read. Learn how they met, their goals, and some fun things that might surprise you! It always looks spectacular whether you're using binoculars or a telescope. It never looks precisely the same no matter how often you view it, and can be observed even on hazy or partially cloud-covered nights.
You really can't get anywhere here on Earth without consulting a map and similarly, you can't identify much on the moon without a map either. So that's the best place to start. With a lunar map and perhaps a photograph of the moon as a guide, you can easily study the moon and identify a number of its most prominent features. In most cases, a lunar map will be oriented to show the moon as it would appear to your unaided eye or through binoculars: with its north side up.
However, be aware that many astronomical telescopes provide an inverted upside-down view, and some even give a reversed mirror-image view. Some telescopes even do both. If your telescope turns the moon upside-down while your map shows the moon right-side up, just turn the map upside down. On the other hand, you'll get a reversed view if you're using a telescope where the eyepiece fits into a right-angle attachment called a star diagonal.
In such a situation you'll have to mentally flip the moon in your eyepiece right-for-left to match the moon on paper. The latter is mainly for observers with refractors and Cassegrain telescopes, which reverse the moon's image left to right. This map is on a large-enough scale to show fine detail, but is folded in four to make it easy to use at the telescope. It is laminated with plastic to protect it from dew. The craters and mountains on the moon are easier to see through a small telescope.
The general rule of thumb regarding magnification is 50 power for each inch of aperture of your objective lens. So if, for example, you are using a 2. If you have a 4-inch, reflecting telescope, the maximum magnification is power. Why can't I use that?
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