Tele Vue Nagler Type 4 22 mm: focal length 22 mm, apparent field of view 82°, 2-inch thread, and eye relief 19 mm. Part number EN4-22.0.
CHF 668.00incl. Swiss VAT
Part Number EN4-22.0
The Tele Vue Nagler Type 4 22 mm is a 22-mm astronomical eyepiece offering an apparent field of 82°. It mounts on a 2-inch slip-on adapter and has an eye relief of 19 mm. This configuration is worth considering for star fields and extended deep-sky objects, depending on your telescope's focal length.
Nagler eyepieces offer an apparent field of view of 82°. The different types represent distinct design choices: compare the focal length, eye relief, thread type, and weight—not just the product family name.
| Manufacturer reference | EN4-22.0 |
|---|---|
| Family | Nagler 4 |
| Focal length | 22 mm |
| Apparent field | 82° |
| Flow | 2 inches |
| Eye Discharge | 19 mm |
| Field diaphragm | 31.1 mm |
| Weight | 1.5 lb / 24 oz |
What is the magnification with this eyepiece?
With a telescope that has a focal length of 1,000 mm, this eyepiece provides approximately 45× magnification. The magnification is calculated by dividing the telescope’s focal length by that of the eyepiece.
Is it compatible with my telescope?
It requires a 2-inch eyepiece holder or a 2-inch right-angle mirror. It cannot be inserted directly into a 1.25-inch mount. Also check that it is securely fastened and properly balanced.
Can you observe things with glasses?
The specified eye relief is 19 mm. Comfort when wearing glasses also depends on their shape and how the eye is positioned; trying them on is always better than relying on a one-size-fits-all guarantee. The Tele Vue chart indicates DIOPTRX compatibility; this astigmatism corrector is optional.
Is the apparent field the field visible in the sky?
No. The apparent field of view of 82° describes the view through the eyepiece. The actual field of view depends on the telescope; the 31.1 mm field stop is the value to use when calculating it.
Check the focus travel, the focus adjustment range, the weight your setup can support, and the compatibility of filters or correctors. The product offered is a Tele Vue Nagler Type 4 22 mm eyepiece; the accessories listed are optional. The availability shown reflects our supplier’s status at the time of the last check and does not indicate a reserved quantity.
Features and Compatibility: Tele Vue EN4-22.0 Official Specifications Sheet.
