Table of Contents
- 1 What is good eye relief for a telescope?
- 2 What should I look for in a good telescope?
- 3 Should you close one eye when looking through a telescope?
- 4 What does eye relief mean on a telescope?
- 5 What’s a good telescope for looking at planets?
- 6 What eyepiece is best for planets?
- 7 What kind of eyepiece do you need for a telescope?
- 8 What should my eye relief be for a telescope?
- 9 How does an eyepiece affect the tfov of a telescope?
What is good eye relief for a telescope?
This is frequently called a “scope bite”, or the “idiot cut”, due to the obvious and long-lasting nature of such a mistake. Typical eye relief distances for telescopic sights are often between one and four inches (25 to 100 mm), as opposed to the much shorter 15 to 17 mm for typical binoculars.
What should I look for in a good telescope?
The key spec for any telescope is its aperture, or the diameter of its lens or mirror. The bigger the better because a bigger aperture can collect more light and distant objects appear brighter. But this comes at a price, and bigger telescopes are also much less portable.
What kind of lens do I need to see stars with a telescope?
Experienced planetary observers use 20x to 30x per inch of aperture to see the most planetary detail. Double-star observers go higher, up to 50x per inch (which corresponds to a ½-mm exit pupil). Beyond this, telescope magnification power and eye limitations degrade the view.
Should you close one eye when looking through a telescope?
Observing through your telescope’s eyepiece with both eyes open gives an advantage. Telescopes aren’t designed to be viewed this way, but by closing one of your eyes, the open eye becomes less effective in seeing objects. This is why the eye doctor blocks one eye but tells you to leave the blocked eye open.
What does eye relief mean on a telescope?
Eye relief is the distance from the outer surface of the eyepiece lens to the position where the exit pupil is formed (eyepoint). Looking through binoculars from the eyepoint, you can obtain the whole field of view without vignetting.
Is more or less eye relief better?
To keep things simple, be sure to purchase a scope that has at least 3.5 inches of eye relief. If your rifle has heavy recoil, go for even more eye relief.
What’s a good telescope for looking at planets?
Best telescope for viewing planets
- Orion AstroView 90mm EQ Refractor Planetary Telescope.
- Explore Scientific FirstLight AR102 TN Refractor Telescope.
- Orion 09007 SpaceProbe 130ST Equatorial Reflector Telescope.
- Celestron AstroFi 102 Planetary Telescope.
- Celestron Omni XLT 120 Refractor Planet Telescope.
What eyepiece is best for planets?
The focal length of the telescope is 900mm, so to achieve the maximum useful magnification, then a 4.5mm eyepiece would be ideal. One of the best parts about planetary viewing or imaging is that since the objects are so bright, you can do it just about anywhere regardless of light pollution.
Where do you put your eye on a telescope?
Place your eye just behind it to take advantage of its eye relief. Do not place your eye directly against the eyepiece; getting too close will prevent you from blinking and also cause a black ring to appear around the field-of-view.
What kind of eyepiece do you need for a telescope?
Recommended eyepiece for eyeglass wearers If you are telescope viewing with glasses and want a good eyepiece, then consider the Explore Scientific 92º 17 mm (also available in 12 mm). It has long eye relief (20 mm), is lower in price than the top-rated, but users claim it is of good quality with excellent ergonomics.
What should my eye relief be for a telescope?
For eyeglass wearers look for at least 15 mm. Though, many choose 20 mm for a comfortable fit. This applies to telescopes, binoculars, and microscopes. The instrument’s eye relief is the distance (mm) between your eye and the instrument’s eyepiece that gives a full field of view comfortably.
What’s the best field of view for a telescope?
Eyepieces with 50° – 65° apparent field of view are midrange eyepieces. Cheapest eyepieces come up till 65° of AFOV. Eyepieces with 65° – 85° apparent field of view are considered to be wide-angle eyepieces. These are probably the best price for value and this is where the price starts to climb.
How does an eyepiece affect the tfov of a telescope?
AFOV is a feature, a specification of the individual eyepiece; how that eyepiece interacts with your particular telescope will define the TFOV that you will see. At any given but equal magnification, the larger the AFOV, the larger the TFOV you will see.