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 WideBino28 is a peculiar star-gazing instrument yielding 28-degree field
of view with your both eyes. While most constellations can be captured
within a field, 1 or 2 magnitude darker stars can be detected - you must
feel as if your eyes are suddenly "doped". Since early 90's,
this unique device has been enthusiastically loved by huge number of Japanese
astronomers. Now it's your turn to experience this marvelous view. |
| WideBino28 was entirely renewed in April 2016 - the optical quality, usability
and versatility are all dramatically improved. For more details, click
here. |
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| <Optical Design> |
| Basically the field of view of Galilean opera glasses is very small. The
only way to widen it is to use extremely fast (f/2 or faster) objective
lenses, but normal achromat doublet lenses of such fast f-ratio show strong
aberrations and it's practically impossible to be used for visual observations.
The optical design of WideBino28 is epoch-making as adopting 2-group 2-element
meniscus objective lenses and 1-group 2-element cylindrical eyepieces,
achieving edge-to-edge very flat widefield with very little aberrations.
You can enjoy pinpoint star images within full field of view. Every surface
of the lens element is broadband multi-coated to enhance the transmission
rate, and all the inner walls are thoroughly threaded and blackened to
eliminate the stray lights. |
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| <Mechanical Features & Accessories> |
| Most parts of Max. 123mm width / 255g weight compact body are made of metal.
Individual focusing. Front & rear dustcovers are standard. Comes with
a neckstrap and a soft carrying case with a shoulder strap and a belt loop. |
| <General Aptitude> |
| The extremely wide 28-degree field of view brings overwhelming feeling
of liberation, having a great aptitude for night sky observations. It can
capture one constellation within a field of view, with 1 or 2 magnitude
darker stars emerged - it must be the best and the only one device that
can do a "feat" for the observes to see the whole figure of a
constellation with scattered deep-sky objects in it. Especially, the beautiful
images when seeing the Milky Way are beyond expression. Once you see it,
you must become addicted. Please do have such a peculiar experience as
"constellations come closer to you". |
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| Clear Aperture |
40mm |
| Power |
2.3x |
| Field of View |
28-degree |
| Max. Dimensions |
123mmx40mmx50mm |
| Weight |
255g |
| Interpupillary Distance |
52mm - 73mm |
| Diopter Range to focus infinity |
> -6 diopter |
| Focusing Mechanism |
IF |
| Standard Accessores |
Front & Rear Dustcovers
Neckstrap, Soft Carrying Case |
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NOTICE (1) : Galilean telescope system has no eye-relief. The best way to see the
widest field of view is to "press" your eyes close to the eye
lenses. Therefore, it's essential to see through WideBino28 with your naked
eyes. (Very strongly shortsighted eyes, as - 6 or less diopter, can't reach
the infinity focus. In such cases wearing contact lenses is recommended.)
NOTICE (2) : The field of view of Galilean telescope system varies by the pupil diameters
of the observer. 28-degree can be obtained when the pupils are opened maximum
(usually 7mm.)
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*Dear Customers in USA & Canada
You can purchase WideBino28 from our exclusive distributor "Agena Astro Products". |
*Dear Customers in Europe
You can purchase WideBino28 from our exclusive distributors "AOK Swiss", "Telescop-Service" & "Okulalum". |
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| A pair of adapter ring set to accept M48 filters (for 2" eyepieces.)
Try to enjoy diffuse nebulae near Milky way with UHC filters, or challenge
to detect faint and wide-spread nebulae like Bernard's Loop or IC1396 with
OIII or H-beta filters. Just remove the rings in front of the objective
lenses, and screw those adapters - then M48 filters can be attached. |
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| WideBino28 + M48 Filter Adapter +M48 Nebula Filters (not included) |
<NOTICE>: The thread sizes of the former WideBino28 (supplied until
April 2016) and the latest model's are different.
When ordering M48 Filter Adapters, please indicate which model you own.
(We have 2 types for both in stock.) |
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| A 70-gram extremely lightweight GFRP (Glass-Fiber Reinforced Plastic) headset
for WideBino28. Though it looks a bit suspicious, this unique device will
bring you to a marvelous world you've never experienced - you can enjoy
a gorgeous star-watching tour with your both hands completely free! |
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| WideBino28 + WideBIno-Goggle |
"Buy-Together" Special Offer
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