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Apogee telescope refractor cassegrain eyepiece 1.25" 9mm to 22mm zoom with caps For Sale


Apogee telescope refractor cassegrain eyepiece 1.25



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Apogee telescope refractor cassegrain eyepiece 1.25" 9mm to 22mm zoom with caps:
$56

This sale is for a late 1999 Apogee (Taiwan-made) 1.25-inch 9mm to 22mm zooming eyepiece. It will come with the original top dust cap and an aftermarket bottom dust cap. Optics are fully coated.
This particular model is hard to find as it is one of Apogee's much earlier-marketed zooming oculars. The commonplace model that most will come across is their 7.3mm to 22mm zoom. That one is shorter and does not have the dual rubber grip feature. The original zoom they made was the 7.4mm to 22mm zoom, which I've not owned.I've seen this one here sparsely advertised between very late 1997 to early 2000.
Barrel size: fits all 1.25-inch diagonals, focusers, and barlowsThreaded for filters: yesStanding height: 3.98-inchesFocal length stops: 9mm, 11mm, 15mm, 22mmField of view: 55 degrees at 9mm, 34 degrees at 22mmExit pupil size: 16mmZooming type: non-click stop; very smooth, unmarked transitionMaterials: milled aluminum, brass, rubber grips, vinyl eye guard, optical glassWeight: 4.7 ounces
This eyepiece falls between the Orion Explorer II Zoom (Suzhou Synta of China) of around 2003 and the Celestron Compact Zoom (Nihon Seiko of Japan) of around 1995. It has sharper edge-on optics over the Orion, but is not as pinpoint on planetary detail beyond 40-degrees outward as is the Celestron. All this was tested in my FS-152sv and Celestron C80.
It's eye relief is also equal to these other brand models. The Vixen LV Zoom, TeleVue non-Nagler Zoom, and the Orion Premium Zoom have longer eye relief over this one. Regardless, in nearly all situations, if you wear eyeglasses, you'll be fine to keep them on. Positioning is very easy.
These are outstanding eyepieces to use on the Moon, Jupiter, Saturn, brighter double stars, globular clusters like M13, M92, and M22, and fairly intense open clusters like M45, M29, M37, M35, the Double Cluster, and M41. For daytime observation of objects like radio towers, distant hikers, birding, ship watching, ect, this is unmatched as you have multiple magnification capability immediately at your fingers. Since this particular model zoom does not click stop, you effortlessly zoom in-and-out of your object of interest, and this makes for a fun experience.
For the most part, a zoomer like this will work in a huge variety of telescopes. I've played with this in my many vintage Celestron, Tasco, and Jason refractors, quite a few cassegrains like the C90, ETX-125, C11, Meade 10 LX200, and Atlas 11. It works quite well in 4.5-inch to 10-inch reflectors in the f/5 to f/9 range. Images are sharp and carry good contrast. Unless a very high standard zooming ocular like the Celestron Deluxe Zoom from Japan, Hyperion Zoom or the Nagler Zoom, there will always be some edge-on distortion. The quality of your telescope's optics and the precision of that scope's collimation will GREATLY affect the quality of view this zooming ocular gives. But regardless, it will never be quite as perfect as that of an individual ocular.It is for a tiny sacrifice in optical resolution you gain extreme convenience of instant, multiple magnifications.
For a special note: if using this in squat refractor designs like the Orion Short Tubes, Vixen Neo 120 and Neo 140, TeleVue Pronto or 76mm, and very rich field scopes like the Takahashi FCT-76, Megrez 80, or Borg Mini 50, make sure you remove your 2-inch to 1.25-inch adapter (if applicable) and/or any other extenders from your focuser before viewing. Zooming eyepieces usually need close inside focus (moving towards the telescope objective/mirror) when focusing.
Packed with great care.
Combined shipping offered.
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