Outfitted with a wide and useful focal length range that is ideal for all kinds of astronomical observation and astrophotography, the Alpine Astronomical Baader Hyperion 8-24mm Mark IV Zoom Eyepiece will be an invaluable addition to your telescope kit.

Its performance starts with a 7-element/4-group flat-field lens design that is treated with Phantom Coating Group multi-coatings. These features work together to deliver clear and bright high-contrast views with edge-to-edge sharpness without distortion or astigmatism. A simple rotating selection system allows users to run through the focal length range with positive click-stops at each setting, and for ease-of-use the eyepiece is parfocal so there will be little to no need to refocus when moving from one focal length to the next.

The Mark IV has been engineered for use on a wide variety of gear and comes with nosepieces to fit standard 1.25" drawtubes and accessories with the option to swap it for a 2" nosepiece or an adapter to thread onto standard 2" Schmidt-Cassegrain telescope (SCT) visual backs. Removing the eyecup reveals M43 T-mount threads that accept optional accessories from their Astro T-2 modular system, including camera-specific T-rings for projection astrophotography techniques, and extension tubes. For comfortable viewing, the eyepiece comes with three interchangeable eyecups: a fold-down rubber version, a winged model, and a large twist-up adjustable option.

From the moon to the planets to deep sky objects, the Mark IV zoom eyepiece provides versatility that is easy to use.

8-24mm Zoom Eyepiece    Phantom Coating Group Multi-Coatings    7-Element/4-Group Flat-Field Lens Design    1.25" and 2" Diameter Barrel Options    Parfocal through Entire Zoom Range    Three Interchangeable Eyecups    2.25x Modular Barlow Lens    Air-Spaced Triplet Lens Configuration    Anastigmatic Flat-Field Design    Internally Baffled and Blackened

• 7-element/4-group flat-field lens design maintains edge-to-edge sharpness
• Phantom Coating Group multi-coated optics maximize light transmission for improved contrast and clarity
• All focal length options are parfocal, requiring little to no refocusing when moving through the entire zoom range

• Change magnification by selecting a longer (low power) or shorter (high power) focal length
• Selectable focal length for 8mm, 12mm, 16mm, 20mm, and 24mm
• Field of view, eye relief, and field stop distance change based on focal length setting
• Positive click-stops provide tactile feedback for each focal length selection

• 1.25" nosepiece fits the most common-size drawtubes and accessories, threaded for standard 1.25" filters
• 2" nosepiece allows it to fit larger drawtubes and focusers, threaded for standard 2" filters
• Standard 2" SCT visual back female threads for direct connection to optical tube assembly
• Spotting scope adapter: For use on those spotters that accept astronomical eyepieces, it provides 4mm additional back focus to allow it to achieve the proper focus at infinity

• M43 thread on top of the eyepiece
• Allows attachment of any desired DSLR or T-2 accessory by means of the optional T-rings and camera-specific T-mounts
• Remove eyecup to reveal adapter threads
• Optional extension tubes may be required for full-frame and APS-C cameras

• Winged rubber eyecup blocks peripheral terrestrial light to improve contrast and eliminate distractions
• Fixed folding rubber eyecup allows easy use with or without eyewear
• Large adjustable twist-up eyecup provides precise eye relief setting

Related Questions and Answers

Q: 1. Is it parfocal with other Alpine Hyperion eye pieces?

A: This is the only additional information B&H has on the Alpine Astronomical Baader 72° Hyperion 36mm Aspheric Eyepiece (1.25"/2") https://alpineastro.com/products/baader-36mm-hyperion-aspheric-2-eyepiece And yes to the compatibility with other eyepieces

Q: 2. I have a Fuji X-Pro3 and T-Adaptor (for Fuji). Do I need this B&H #ALHTA43T2 in order to connect to the Mark 4 zoom?

A: That is correct, the B&H #ALHTA43T2 adapter is necessary to attach to T Mounts.

Q: 3. Is this zoom eyepiece click-stop? If yes, how many increments?

A: No it does not there are 4 markings 8,12,16 24 it works great

Q: 4. Can I use the Baader 76 degree Morpheus 4.5 mm eyepiece in the Celestron Regal M2 100ED spotting scope I have ordered from B&H?

A: It probably wont work properly because its too magnified. The Spotting scope is too short a focal length, I would recommend a 12 mm & higher.

Q: 5. Dear i heave telescope skywatcher p250 quattro-10 and iready pay this eyepiece but it is not clear i dont now whay???

A: Dear Qassem, Please contact our Technical Support Department, so a representative can speak to you and help to troubleshoot the issue which could be caused by a variety of different reasons such as optics in need of collimation, scope needing cool down, etc. You can reach our Technical Support Department by submitting a ticket at: https://www.celestron.com/pages/technical-support Sincerely, Garrett at Celestron

Q: 6. What is the thread diameter and TPI or Pitch under the rubber eyecup?

A: That information is not published by Celestron

Q: 7. What items are in the box?

A: The Alpine Astronomical Baader 2x Carl Zeiss Abbe Barlow Lens (1.25") BH #ALZBARLOW • MFR #ZBARLOW comes with the Alpine Astronomical Baader 1.25"/T-2 Click-Lock Eyepiece Holder Adapter BH #ALT208 • MFR #T2-08 and a 2 year aarranty.

Q: 8. With the Barlow attached, this effectively goes between 3.5mm - 10mm, right?

A: With a 2X barlow correct

Q: 9. What is the outer housing diameter of this piece?? I need it to fit inside the 1.25" Orion Variable Universal Camera Adapter. So this eyepiece needs to have an outside diameter of less than 38.3mm.

A: The outer housing diameter of this eyepiece is listed at 101.5 mm so it would not fit.

Q: 10. I have this unit purchased, but it is on back order. Now I am looking at filters to go with it. Do filters need to be 1.25" or 2" in diameter to work in combination with this eyepiece?

A: You may use both 1.25" filters and 2" filters with the Alpine Astronomical Baader Hyperion 8-24mm Mark IV Zoom Eyepiece (1.25"/2"). According to the manufacturer, the Alpine Astronomical Baader Hyperion 8-24mm Mark IV Zoom Eyepiece (1.25"/2") includes both 1.25" and 2" barrels. The 1¼" Barrel is threaded for standard 1¼" filters, and the 2" Barrel for standard 2" filters.