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KennyJ
Reged: 04/27/03
Posts: 10163
Loc: Lancashire UK
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Re: Nagler-like performance...
05/06/08 04:05 PM
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Bob ,
You opted to choose " Nagler " as a yardstick in the heading , but then went on to mention that Field of View was unimportant .
Are you necessarily trying to find out if there are ny binoculars that have 82 degree or wider AFOV eyepieces which are well corrected to the very edge ?
if that is the case , I think you are going to be disappointed .
If not , and you are just wanting to find binoculars with pin - point stars to the edge , regardless of AFOV , then that is another question .
Not that there are many , to my knowledge , even with AFOVs more comparable to Radians or even Plossls .
On the other hand , if F.O.V , eye relief and objective diameters are irrelevent to you , you could try masking down the objectives of some very good 50mm binoculars , to say 35mm , ( to increase f.ratio ) and fit washers to reduce eye relief , but also to " cut - out " the outer 20% of the field of view ( hiding the rubbish , as I've put it before ) by effectively creating a new , narrower field stop .
That way , you " could " end up with something like a 10 x 35 with a 4 degree TFOV with pin - point stars to the very edge !
Regards
Kenny
--------------------
If everyone is thinking the same thing , no-one is thinking - General George S.Patton
Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera
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