The Ostara HR range of Plossl eyepieces provide excellent value for money with high optical and build quality. Fully coated to reduce reflections with standard astro 1.25″ fitting (suitable for the majority of astronomical scopes and some spotting scopes – ask if unsure).
Available in 7 sizes (5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm – see other listings for other sizes).
Supplied in plastic cases for protection/storage.
Plossl eyepieces provide a wide field of view and are therefore ideal for a wide rage of observational applications such as planetary and deep sky viewing.
This listing is for the 25mm eyepiece only – group picture is for illustration of the sizes available
What Magnification is this Eyepiece?
The magnification produced by an eyepiece depends on the optical system it is used in. In a standard astronomical telescope the magnification is found by dividing the focal length of the main tube by that of the eyepiece. For example, a 1000mm scope tube used with a 10mm eyepiece gives 1000/10 = 100x magnification. Used with a 5mm eyepiece gives 1000/5 = 200x.
Steplessly adjustable magnification range of 10x to 30x (20 binoculars in 1!!!)
Seben’s original emerald-green lens coating for increased twilight performance
Minimal dimensions and very light weight
Ergonomic bicolour-design (black/silver)
Fold down eyeguards for spectacle wearers
Seben Magellan 10-30 Ultra Zoom x 25mm Seben’s original emerald-green lens coating
20 binoculars in one!!! Small + zoom + ergonomic = handy as no other binoculars!
If you expect your observations to be entirely satisfactory and if you want to be delighted by your binoculars each time you use it, you should choose quality!
Ergonomic high-precision binoculars with ultra zoom.
Due to its modern slim-line-design Seben’s Magellan 10-30 Ultra Zoom x 25mm is perfectly suitable for all nature, sports and wildlife spectators. It’s a must have if the combination of user-friendliness and high quality is of great importance to you! Tolerate no more compromises regarding the optical and mechanical performance! With Seben’s Magellan 10-30 Ultra Zoom x 25mm there are no compromises!
The extraordinary characteristics of Seben’s Magellan 10-30 Ultra Zoom x 25mm:
10x – 30x Zoom (20 binoculars in 1!!!) Seben’s original emerald-green lens coating for increased twilight performance Minimal dimensions and very light weight Ergonomic bicolour-design (black/silver) Fold down eyeguards for spectacle wearers