The fourth generation of this eyepiece weighs 290 gram and is lighter by 80 grams than its predecessor – it now has 55 mm diameter to become useful in dual mode from 55 mm interpupillary distance, both features make it especially desirable for use with bino-viewers. The adjustable eyecup can be removed to expose the M43 video/photo thread and create the maximum “nose space” for using it on binocular viewers with the supplied winged rubber eyecups – for maximum concentration on the target. The click-stop action has been smoothed out to more easily access the magnification stops at 8/12/16/20 and 24mm (click-stops are mandatory to easily and precisely set both eyepieces to the same focal length for effortless binocular observation without eye-strain). The zooming-mechanism as well as the inner zooming rails for all lens groups have been modified to improve cold temperature operation and the parfocalty for each focal length has been fine-tuned.
Most important however – the Mark IV offers almost 4 mm more backfocus. This is most beneficial for application with a multitude of spotting scopes. Two different Adapters for telescope and spotting scope adaptation are included with the eyepiece (Spotting-Scope Adapter „A“ and Telescope-Adapter „B“). Read more at “Telescope-sided Connections”).
The Mark IV comes with both the 2″ and 1¼” nosepieces mounted, each nosepiece having it´s own dust cap and both nosepieces are threaded to accept either 1¼” or 2″ eyepiece filters. Both nosepieces are free of the hated undercuts. Instead our proprietary Zero-Tilt Safety-Kerfs provide an added measure of security by reducing the tendency of an eyepiece to slip from an unlocked eyepiece clamp. An additional little feature is the Baader-yellow soft pouch with integrated belt strap – which fastens onto many tripod legs just as well, to serve as a bin for all dustcaps that may go astray otherwise.
As usual with Baader eyepieces, the Mark IV offers an M43 photo/video thread on top of the eyepiece, to allow attachment of any desired DSLR or T-2 accessory for mounting a video-camera by means of the optional M43/T-2 adapter ring #2958080. Unchanged is the optical quality, 68° field of view at highest magnification, Phantom Group multicoatings, a large adjustable eyecup or alternatively two M43 rubber eyecups for bino viewing. An optional spacer ring M43/M43 (#2954250) with 7,5 mm extension enables the user to increase the height of these eyecups in case of need.
The Mark IV likewise accepts adaptation of the 2.25x Hyperion-Barlow onto the 1¼” nosepiece, to transform into a high power zoom, featuring the magnification range of 3.6 to 10.7 mm. The Hyperion Universal Zoom Mark IV is available individually (#2454826) or as set together with the 2.25x Hyperion Barlow (#2454827)
WEIGHT (KG) 0.290
FOCAL LENGTH 8 – 24 mm
APPARENT FIELD OF VIEW 48° – 68°
NUMBER OF LENS ELEMENTS 7
NUMBER OF GROUPS 4
AR-COATING Phantom Coating® Group
THREADED FOR FILTERS Yes
CAMERA THREAD M43
PARFOCAL EYEPIECES Yes
DUSTCAPS 1¼” dustcap (31,8mm), 2″ dustcap (45mm), 2″ dustcap (46.5mm – fits over eyecup)
EYECUPS large height adjustable eyecup (M43), small eyecup (M43), winged eyecup (M43)
SLIP PROTECT SAFETY Safety Kerfs
EYEPIECE BODY ABOVE REFERENCE PLANE (MM) 81 mm
LENGTH OF 1¼” BARREL (MM) 24,5 mm
LENGTH OF 2″ BARREL (MM) 27 mm
OUTER DIAMETER 55 mm
OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M43
INNER CONNECTION (LENS SIDED) Thread, 1 3/8″, 2″
OUTER CONNECTION (LENS SIDED) Barrel, 1¼”, 2″
EYEPIECE SERIES Hyperion
BARREL SIZE (IN) 1¼”, 2″
OPTICAL DESIGN Modular
SPECIALITY Eyepiece projection: afocal, Eyepiece projection: classical
SINGLE OR SET? Single Eyepiece