Baader Hyperion Universal Zoom Mark IV - the fourth generation of the successful zoom eyepiece with improved properties.
♦ Focal length adjustable from 8 mm to 24 mm
♦ Improved Clickstop action at 8, 12, 16, 20, 24 mm
♦ Ideal for bino-viewing through Clickstop (precisely set magnification) and narrow body
♦ up to 68° wide angle field of view, never below 48°
♦ Phantom Coating for complete absence of reflections, highest brilliance and very good contrast
♦ Very comfortable view - no kidney-beaning, no "crawling into the last lens"
♦ Three eyecups, optimised for different applications
♦ Camera connection possible via M43 thread - screw connector for DSLR and digital cameras
♦ Comes with 2" and 1.25" barrel and SC thread
The Hyperion zoom eyepiece is already in its fourth generation - five magnifications in one eyepiece - focal lengths of 8, 12, 16, 20 and 24mm, with a further improved click-stop detent design and an apparent field of view of up to 68°.
Some of the special feature of this very high-quality zoom eyepiece include:
Baader Phantom Group coating™ - this is a 7-layer broadband anti-reflection coating with extremely low residual reflection. The designation 'Group' indicates that the most effective anti-reflection layer system is worked out for each type of glass used in the respective eyepiece.
All these various antireflection coatings, on each type of glass surface, have then been optimized so that they are most effective where the human eye is at its most sensitive at night - i.e. at about 520nm, which is in the green region of the spectrum.
The best anti-reflection coatings appear almost colourless - this proves that the coating is functioning equally well over the entire visible spectrum. Phantom Group antireflection coatings are - depending on the type of glass - almost entirely colourless. In this way it is ensured that the least light is lost to the night-adapted eye and that no scattered light will interfere.
If you look directly at a coated lens (eyepiece or objective) and can see a strong green reflection, then it is not a Baader Phantom Group coating! An intense green reflection is indicative of a relatively low-tech coating technology and means that light is being wastefully reflected - i.e. lost - right in the useful spectral range between 500-550nm.
|Coating of optical system||Baader Phantom Group coating|
|Focal length (mm)||8 (Zoom spans 8-24)|
|Connection (to the telescope)||1.25" & 2"|
|Connector (at camera end)||M43|
|Number of groups||4|
|Number of lenses||7|
|Eye relief (mm)||16|
|Apparent field of view (°)||48-68° (24mm: 48°; 8mm: 68°)|
|inert gas charge||no|
|Adjustable eyepiece cup||yes|
|Type of build||Zoom eyepiece|