One barrel across a range, with a field that narrows · review
Baader's Hyperion Universal Zoom Mark IV: a 68-degree widefield 8-24 mm zoom with click stops at five focal lengths, 1.25-inch and 2-inch barrels, Phantom Coating Group multi-coatings, three eyecups and an M43 photo thread.
The Hyperion Universal Zoom Mark IV is Baader’s fourth-generation zoom. It covers 8 to 24 mm with click stops at 8, 12, 16, 20 and 24 mm, a “smoothed-out” action that Baader calls a must for binoviewing.
Baader states a 68-degree widefield, long eye relief and a flat-field design, sharp to the edge, with its Phantom Coating Group multi-coatings. It does not give eye relief or field as figures at each end.
Both 1.25-inch and 2-inch barrels are included, so it fits any focuser, plus some spotting scopes with a 1 3/8-inch thread. An M43 thread accepts camera adapters for afocal and projection photography.
Three are supplied: a large adjustable one, a small straight one, and a winged foldable one that fits over the M43 thread.
On November 7, 2026, Amazon.com listed it at about $396 from a third-party seller.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on November 7, 2026. The live price is at the top of the page.
Same aisle, closest price — what the same spend else shows.
| Focal length range | 8 to 24 mm |
|---|---|
| Apparent field at both ends | 68° widefield, stated (end-by-end figures not given) |
| Eye relief | Long eye relief, stated · no figure |
| Parfocality | Not published by the maker. |
| Action | Smoothed-out click-stop action, suited to binoviewing |
| Stops | Five: 8, 12, 16, 20 and 24 mm |
| Barrel size | 1.25 in and 2 in barrels included · fits some spotting scopes with 1 3/8 in thread |
| Coatings | Phantom Coating Group multi-coatings · flat-field design |
| Body | Large adjustable eyecup, small straight eyecup and winged foldable eyecup included · M43 photo and video thread |
| Amazon reference | B01MY82H9Y |
| EAN | 4047825035899 |
They let each focal length be set exactly and found again by feel. With a binoviewer, both eyepieces can be set to the same stop.
It accepts camera adapters for afocal and eyepiece-projection photography.
Baader states 68° and adds click stops, two barrels and a photo thread; Celestron's [93230](/reviews/zoom-eyepieces-celestron/) states 40 to 60° and costs far less. The comparison is at [Baader Hyperion Zoom vs Celestron 8-24](/comparisons/baader-hyperion-zoom-vs-celestron-8-24-zoom/).
7.8/ 10
A system zoom with five click stops, two barrels and a camera thread, its 68-degree claim published and its price the highest here.
This model is listed on Amazon.com, at ≈ $396 at the last reading. Listed is not the same as in stock: availability changes daily, and the buy box shows the live price.
Details checked on November 7, 2026.
An owner of 1.25 in and 2 in focusers, or a binoviewer, who also photographs through the eyepiece
Specifications: the manufacturer sheet for telescopes and observing optics and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
7–21 mm stepless zoom · 30° at 21 mm, 47° at 7 mm · 16–33 mm eye relief · four multi-coated elements · 1.25 in
Astromania's FMC 7-21 mm zoom: four multi-coated elements, an apparent field of 30 degrees at 21 mm and 47 at 7 mm, 16 to 33 mm of eye relief, a rubber traction ring and a 1.25-inch filter thread.
Best for: One eyepiece instead of four, for someone who wants to know what the long end costs in field
≈ $43
8–24 mm zoom · 40° to 60° apparent field · 15–18 mm eye relief · 1.25 in · threaded case · 2-year warranty
Celestron's 93230 8-24 mm zoom: a 1.25-inch eyepiece with a 40 to 60-degree field, 15 to 18 mm of eye relief, a rubberized barrel that turns to zoom and a threaded plastic case, with no offer on Amazon.com when checked.
Best for: Observers who want to stop swapping eyepieces in the cold
8–24 mm stepless zoom · 40° to 60° apparent field · 15–18 mm eye relief · 7 elements in 4 groups · all-metal · 1.25 in
Alstar's 8-24 mm stepless zoom: a 7-element, 4-group multi-coated eyepiece with a 40 to 60-degree field, 15 to 18 mm of eye relief, blackened lens edges, a foldable eyecup, an all-metal body and a 1.25-inch filter thread.
Best for: An eyeglass wearer who wants one eyepiece instead of four, with eye relief published at every setting
≈ $66
