Celestron Omni Ploessl is a series of high-end symmetrical, 4-element eyeglasses. They are characterized by high quality mechanical performance and good optics.
The body of each eyepiece is subjected to a two-stage anodization process in order to obtain higher durability and eliminate reflections.
The edges of the lenses are blackened, which reduces internal reflections and gives a higher contrast to the images obtained. Optics coated with high quality MC layers on all optical surfaces.
The eyepiece has a 1.25 "filter thread and a soft rubber eyecup.
A 15 mm focal length eyepiece allows you to obtain medium magnifications that are very important in astronomical observations. Works well with all optical constructions, with any light. Combined with a good quality Barlow 2.5x lens (eg GSO APO 2.5x / 1.25 "), it can replace an eyepiece with 5 mm focal length.
For example, in a Newton telescope with a focal length of 800 mm and a diameter of 203 mm (eg GSO 203/800 OTA), we get a magnification of 800/15 = 53x, where we can comfortably view the whole moon's shield (the field of view of the eyepiece in this configuration is 1 °, The diameter of the full Moon's face - 0.5 °). In the Maksutów - Cassegrain 150 f / 12 telescope (eg Sky-Watcher MAK 150 OTA PRO), we get a magnification of 1800/15 = 120x, appropriate in all observational conditions, used for objects of compact objects (globular clusters, double systems, planets, Moon).
Okular can be used in all conditions of seeing (atmospheric stability).
Recommended applications: dependent on the telescope, in general all types of objects not too large.
• construction: Ploessla, 4-element
• focal length: 15 mm
• offset of the exit dust: 13 mm
• own field of view: 52 °
• anti-reflection layers: MC on all optical surfaces
• binding: anodised aluminum
• Luminaire diameter: 1.25 "