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K 25 Eyepiece 1 1/4"
Item No.
566530
An eyepiece is part of the optical system in astronomical telescopes. The eyepiece is attached to the telescope and enables the view. It enlarges the image produced by the telescope, similar to a magnifying glass. FOCAL LENGTH AND MAGNIFICATION The focal length of the eyepiece used, along with the
Description
An eyepiece is part of the optical system in astronomical telescopes. The eyepiece is attached to the telescope and enables the view. It enlarges the image produced by the telescope, similar to a magnifying glass.
FOCAL LENGTH AND MAGNIFICATION
The focal length of the eyepiece used, along with the focal length of the telescope, determines the magnification. This can be calculated easily with the following formula:
Magnification = Focal Length Telescope : Focal Length Eyepiece
Example: Telescope 1000mm : Eyepiece 25mm = 40x Magnification
In general: the shorter the focal length of the eyepiece, the higher the magnification. Furthermore, the longer the focal length of the telescope, the higher the magnification. Eyepieces with longer focal lengths provide a better overview of the night sky.
KELLNER CONSTRUCTION
The construction of the eyepiece is decisive for the optical quality of the eyepiece. The Kellner construction delivers good optical results. It is a two-lens construction. Colour aberrations are reduced. Kellner eyepieces provide good image sharpness and good contrast for great viewing pleasure.
FULLY COATED
The full coating (FC) of the lenses enables improved light transmission for the brightest possible image. The coating also reduces reflections.
1.25" CONNECTION
All DÖRR eyepieces feature a standardized 1.25" diameter. That corresponds to 31.7mm. The rear side is fitted with a thread to attach a moon filter (optional accessory).
Specifications
| Focal length | 25 mm |
| Lens coating | Fully coated (FC) |
| Accessory mount | 1 1/4 Inch |
| Type | Kellner |
| Scope of delivery | 1x Eyepiece |
| Hint scope of delivery | Illustrated accessories, not listed in scope of delivery, not included. |
| Note | We reserve the right to make technical and/or design changes without notice. |
| Brand | DÖRR |
| No. | 566530 |
| GTIN | 4000461014208 |
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