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mtb54703
sage
Reged: 11/12/08
Posts: 205
Loc: Eau Claire, WI
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It appears that the AFOV for 7x50s is about 49°-50° - correct?
One exception that I can find info on is the William Optics 7x50s which claim to be 75°. But they are heavy. Currently the Vixen Foresta is at the top of my list.
I'm still devouring EdZ's past posts, will probably stumble across a table eventually. 
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18" F/4.11 AstroSystems Telekit under construction
Meade 12" Lightbridge
Garrett 100mm F/5.3 45º Binocular Telescope
Vixen Foresta 7x50
Chippewa Valley Astronomical Society
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Rich V.
Pooh-Bah
Reged: 01/02/05
Posts: 1395
Loc: Carson Valley, Nevada, USA
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Hi, Mike,
I believe the AFOV figure on the WO site is a misprint; the true FOV is listed as 7.5° which would equate to 52.5° AFOV. I think they mistakenly calculated AFOV for 10x, not 7x!
Rich V
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Binoculars:
33/50/75/150x100 Saturn III, 16x70 FMT-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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pcad
Carpal Tunnel
Reged: 01/17/05
Posts: 1768
Loc: Connecticut
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Still, 7.5° for a 7x50 is pretty decent. Most are between 7° and 7.3°. I belive the vintage SarD 41 had a 10° TFOV. Unfortunately one sold on eBay recently for over $2K. The ProStar is listed as 7.3°
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Peter
Telescopes 25 - 318 mm
Binoculars 15 - 88 mm
Microscope 50x - 1000x
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Mark9473
Post Laureate
Reged: 07/21/05
Posts: 3216
Loc: 51°N 4°E
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Here's what EdZ wrote in his review of the WO 7x50:
Quote:
The fov is stated as 7° 30’, or 7.5°. I measured the True field of view as 7.3° to 7.4°, very close to stated. That gives an eyepiece with an Afov of 52°.
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Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63; Docter 15x60
WO Megrez II 80 FD + Baader 90° T2 Amici
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mtb54703
sage
Reged: 11/12/08
Posts: 205
Loc: Eau Claire, WI
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Quote:
Hi, Mike,
I believe the AFOV figure on the WO site is a misprint; the true FOV is listed as 7.5° which would equate to 52.5° AFOV. I think they mistakenly calculated AFOV for 10x, not 7x!
Rich V
Thanks - that's what I was thinking.
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18" F/4.11 AstroSystems Telekit under construction
Meade 12" Lightbridge
Garrett 100mm F/5.3 45º Binocular Telescope
Vixen Foresta 7x50
Chippewa Valley Astronomical Society
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 14732
Loc: Cumberland, R I , USA42N71.4W
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Oberwerk Mariner 7x50 6.3 45
Captain's Storm King 7x50 7.2 50
William Optic 7x50 ED 7.4 52
Nikon ProStar 7x50 7.5 53
Vixen Foresta 7x50 7.1 50
Captain's Helmsman 7x50 7.3 51
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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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hallelujah
Carpal Tunnel
Reged: 07/14/06
Posts: 2156
Loc: Rocky Mt. High Colorado
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http://www.bigbinoculars.com/m750w.htm 
http://www.holgermerlitz.de/miyauchi7x50.html
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Celestron Traveler 8x25 & B. & H. 8x40 FC JAPAN & Revue 10x50 CF Porro FC JAPAN &
Pentax 12x50 PCF WP II FMC & Pentax 16x60 PCF WP FMC &
Pentax 20x60 PCF WP II FMC & Orion 12x63 Mini Giant FMC JAPAN &
SPECTRUM I 20x65 FC JAPAN &
Orion 15x70 Little Giant II FMC JAPAN & Orion 20x70 Little Giant II FMC JAPAN
Orion 16x80 Giant FMC JAPAN & Orion 30x80 MEGAView FMC JAPAN
Barska 30x80 X-Trail LW FC & Burgess Optical Series II 20x90 FMC
Hallelujah! For the LORD God Omnipotent Reigneth
Edited by hallelujah (11/04/09 04:46 PM)
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mtb54703
sage
Reged: 11/12/08
Posts: 205
Loc: Eau Claire, WI
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Quote:
http://www.bigbinoculars.com/m750w.htm
Wow - those are impressive, but it sounds like they had a few flaws. Did the Chinese ever get around to making a copy of those too?
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18" F/4.11 AstroSystems Telekit under construction
Meade 12" Lightbridge
Garrett 100mm F/5.3 45º Binocular Telescope
Vixen Foresta 7x50
Chippewa Valley Astronomical Society
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GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1296
Loc: Ottawa, Ontario, Canada
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In a way I kind of have a 'Miyauchi Binon.' With the 50mm objectives and 71 deg. AFoV eyepieces installed onto my Mk II right angle bino, it works at about 7.4X with a 9.5 deg. field.
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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
My Gallery
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
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charen
Pooh-Bah
Reged: 05/28/05
Posts: 1083
Loc: New Zealand
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There are examples of Japanese made 'Wide Angle' binos from the 60's to the late 80's. They do have the disadvantage of the earlier and inferior 'coated only' lens and limited eye relief.
However many are still very useable if in good condition and mildew free. I have a 80's 'Scope' 7x50 with a 9.5 degree FOV. It works well on dark skies and certainly gives a 'panoramic' image with is 66 dgree Afov.
Chris
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35 binos.
80mm Cat.
WO66ED
SV NH 80mm / EQ3
Meade 8in.LX90
Skywatcher Equinox ED120 / Goto HEQ5.
Edited by charen (11/04/09 10:46 PM)
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DJB
Carpal Tunnel
Reged: 02/23/05
Posts: 1590
Loc: Lisle NY
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Hi all,
I have three 7x50 very wide actual FOV binoculars. Two are 10*, while one is 11*, all of which are hard to come by these days. And, nope, I wouldn't sell a one of them!
My favourite 10* is the NOVA. The 11* Binolux is a real pleasure to use. But, we are getting way too far out there for an apparent optically perfect generation of optics. The Japanese actually produced some fantastic optcs then, and, they still do so.
Of the three mentioned, the Celestron NOVA is an absolute stunner. But for all practical considerings (see Edz' take on this--worthwhile), why not just use an EWF 7x35. Hey, we can't get everything for nothing, e.g., weight, prism size, cost, or even vintage.
I got lucky enough on eBay. I didn't get burned. FYI.
Best regards,
Dave.
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