1) TeleVue Nagler 4.8 mm A sharp-to-the-edge eyepiece with one small problem. The eye relief is so short that you have to practically place your eye on the lens to appreciate its wide field of view.
https://www.youtube.com/watch?v=c2NL-95Z6TM
Where are Nagler eyepieces made?
As a rule, the small eyepieces are made in Japan (Plössls, Delites, T6 Naglers), while the large eyepieces are made in Taiwan (Ethos, Delos, Panoptics, T4/T5 Naglers).
What are the different types of eyepiece?
There are two major types of eyepieces that are grouped according to lens and diaphragm arrangement: negative eyepieces (or Huygenian eyepieces) with an internal diaphragm and positive eyepieces (or Ramsden eyepieces) that have a diaphragm below the lenses of the eyepiece.
What is a wide field eyepiece?
Wide field eyepieces with long focal lengths give expansive low magnification views, which typically yield a larger exit pupil. This is the virtual image of the telescope’s objective that is formed by the eyepiece – in simplest terms, the diameter of the light cone that strikes your eye at the point of best focus.
What is a TeleVue eyepiece?
Tele Vue Panoptic telescope eyepieces set the standard for wide field optical performance. They are fully multi-coated and feature a sharp, high-contrast image across their 68anddeg; field of view. The optics are housed in an exquisitely crafted body. $274.00 – $576.00.
Who makes explore scientific eyepieces?
JourneyNorth Inc.
Explore Scientific
| Type | LLC |
|---|---|
| Headquarters | Springdale, Arkansas |
| Products | Telescopes, spotting scopes, binoculars, eyepieces and microscopes |
| Owner | JourneyNorth Inc. (2014–present) |
| Website | www.explorescientificusa.com |
Are TeleVue eyepieces good?
TeleVue eyepieces are premium, an therefore of excellent quality.
Which eyepiece is best for viewing 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.
What does Plossl mean?
The Plössl is an eyepiece usually consisting of two sets of doublets, designed by Georg Simon Plössl in 1860. Since the two doublets can be identical this design is sometimes called a symmetrical eyepiece. The compound Plössl lens provides a large 50° or more apparent field of view, along with relatively large FOV.
What does a Barlow lens do?
A Barlow lens is an optical tube containing lens elements that diverge the light passing through them. Named after English physicist and mathematician Peter Barlow, Barlow lenses add a second lot of magnification to each of your eyepieces while maintaining the existing eye relief.
How many telescope eyepieces do I need?
Typically, a collection of four – 6mm, 10mm, 15mm and 25mm – will cover most observing requirements. A good selection of eyepieces will serve you well and give you options depending on what you want to observe.
What is wide angle eyepiece for telescope?
This versatile eyepiece can be used on Celestron spotting scopes, telescopes and other optical instruments that have a 1.25” eyepiece mount. Larger viewing area allows user to quickly acquire and easily follow subjects as they move.
What is a wide field telescope?
WFI is a detector similar to that found in your camera, but with a whopping 67 million pixels, installed at the MPG/ESO 2.2-metre telescope at La Silla Observatory. Such a detector is able to obtain detailed views of extended, very faint celestial objects.
How do you find the AFOV of an eyepiece?
If you have or can get accurate values for your scope’s focal length and your eyepieces’ field-stop diameters, you can calculate an accurate TFoV. To do so, divide the eyepiece field-stop diameter in mm by the focal length of the scope and multiply the result by (360/2φ) or about 57.2958.
What is field stop in a telescope eyepiece?
The field stop is the metal ring inside the eyepiece barrel that limits the field size. It’s projected by the eyepiece so that it appears as a circle out in space when you look through the eyepiece.
What does field stop mean?
Definition of field stop
: a diaphragm that determines the size of the field of an optical instrument.
Are Explore Scientific eyepieces good?
Both Explore Scientific eyepieces provide sharp, high contrast views with pinpoint stars throughout the FOV. The same was true with the 9mm Nagler and the 13mm Ethos. The views through all four were superior the 15mm Plössl, where the stars were not as sharp near the edges.
Are explore scientific telescopes any good?
Generally we were very impressed by this instrument, although it’s let down slightly by the focuser and the supplied 25mm eyepiece, which was fairly average. However, it has great light grasp, excellent optics for the money and is capable of delivering some stunning results.
What is the function of the eyepiece in the microscope?
The eyepiece, or ocular, magnifies the primary image produced by the objective; the eye can then use the full resolution capability of the objective. The microscope produces a virtual image of the specimen at the point of most distinct vision, generally 250 mm (10 in.) from the eye.
What can you see with a 100mm telescope?
What Can You Expect From 100mm Telescopes? (With Photos)
- The maximum magnitude of a 100mm telescope is 13.6. For reference, the Moon has a magnitude of -12.74 and Mars has a magnitude of -2.6.
- The Moon. The Moon looks amazing in these telescopes.
- Mars.
- Venus.
- Jupiter.
- Saturn and Neptune.
- Pluto and Dwarf Planets.
- Mercury.
What can you see with a 4mm eyepiece?
The Apertura 4mm Plossl eyepiece produces sharp, high magnification views of the Moon and planets, and, depending on the telescope, will also work great for double stars, planetary nebulae, and other deep sky objects. Like most Plossl eyepieces, the High Point 4mm has a 52º apparent field of view.
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