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Simon S
super member
Reged: 01/07/07
Posts: 110
Loc: Crawley West Sussex UK
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I have just purchased a pair of Swift Supreme binoculars and was wondering if anyone had any info on them?
They are 10x50s and 420 ft at 1000 yards.
I would imagine them to have high index prisms and a quality similar to the early Audubons?
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Rich V.
scholastic sledgehammer
Reged: 01/02/05
Posts: 985
Loc: Carson Valley, Nevada USA
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Wow, Simon, a 10x50 with an 8° field of view! Sounds like wide field Nirvana! I expect the edges of the FOV to be a bit soft with such a wide angle binocular but many members here find the older wide field binoculars like yours very desirable.
Enjoy,
Rich V
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Binoculars:
33-150x100 Saturn III, 16x70FMT-SX, 10x50 PCF-V, 10x43 DCF-SP, 10x35 E2, 7x35 E, 8x30 E2, 7x26 Custom, 8x23AS Diplomat, 8x23 Travelite
Scopes:
C9.25, 6" f8 reflector, SV80S
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Simon S
super member
Reged: 01/07/07
Posts: 110
Loc: Crawley West Sussex UK
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Thanks Rich V, yes 8° is unusual for a 10x50. I will let people know what there like in comparison with the Jenoptem and maybe the Swift Newports.
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Mike Rapchak
sage
Reged: 11/17/06
Posts: 450
Loc: Indiana, USA
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Simon,
These appear to be similar to- if not identical to my 1984-vintage Celestron Nova 10x50s. That 8-degree FOV - which IMO is this instrument's forte - is awe-inspiring when sweeping the night sky. Plus they're light enough to be used hand-held. Considerable field curvature doesn't bother me since I'm taking in the entire view at once yet naturally looking at the center of it. These binos are built like the proverbial tank and have held up superbly after 24 years of (sometimes careless) use. I doubt thay they're FMC, but they're plenty good enough - especially under dark skies. And 10x is just enough to provide basically rewarding views of individual objects. IMO, for aesthetically delightful general viewing they can't be beat. Their ability to deliver the "big view" (which can appear very "3-D") is what makes them a never-ending thrill to use.
Mike Rapchak Jr. 
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GlennLeDrew
professor emeritus
Reged: 06/18/08
Posts: 624
Loc: Ottawa, Ontario, Canada
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My first thought also was that from this end they look exactly like the Celestron Novas. I had the 7X35, and the eyepiece is almost certainly identical. It has a measured AFoV of about 75 degrees, if I recall. It's *definitely not* 80 degrees, as a naive calculation from magnification and true field would suggest. The eyepiece has mild barrel distortion, thus giving a larger TFoV.
The prisms are certainly a higher index variety, and not good ol' BK-7. Their clear apertures are probably 24.5mm, or very nearly one inch.
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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
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Simon S
super member
Reged: 01/07/07
Posts: 110
Loc: Crawley West Sussex UK
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Well they arrived today and so far I am very impressed.Year of manufacturer is 1980 by JB56.
In comparason to my late 10x50 Jenoptems they are simmilar in field of view and not quite as sharp. Colour fidelity is typical of this kind of coating, slightly warm in tone where the Jenoptem is slightly cool. I will try there low light performance tonight if the rain keeps away, but they are basicly large Audubons and are as thought, using Bak4 prism glass.
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12581
Loc: Cumberland, R I , USA42N71.4W
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Quote:
Colour fidelity is typical of this kind of coating, slightly warm in tone where the Jenoptem is slightly cool.
Coating has very little influence on color fidelity. With the exception of grossly colored coatings (ie. ruby), which actually suppress specific wavelengths of light and should probably be avoided altogether, a warm or cold color impression is far more influenced by the spectral transmission qualities of the glass than by any variance across the spectrum in reflectivity of the coatings.
Coatings (C, MC), generally reduce reflection to about 1.5% or 0.25-0.5%. They do so across a wide band or a wide range of the visible spectrum, and generally they vary in total transmission of wavelenghts by less than 1% across that range. The color seen in the coatings (green, purple, blue) when looking at coatings can mean nothing more than a percent difference in transmission/reflection at a particular wavelength combined with the elements used in making the coatings. It would take far more than that few percent transmission difference for the coatings to have any significant affect on the color impression of the image.
edz
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Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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Simon S
super member
Reged: 01/07/07
Posts: 110
Loc: Crawley West Sussex UK
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Thanks for that edz. As you pointed out those ruby coatings really ruin some of the old Pentax porro's.
Also with the eye cups removed so my pupils are central to the dioptor the image is as sharp as the Jenoptem and the view is fantastic. We have a waxing moon tonight, a great test for internal reflections.
Edited by Simon S (07/08/08 02:48 PM)
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