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hallelujah
Carpal Tunnel
Reged: 07/14/06
Posts: 1626
Loc: Colorado Rocky Mt. High
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Quote:
Based on my evaluation of the spotter, I believe the "standard optics" Highlander would make a fine high mag binocular.
Is this the one you're talking about?
http://www.amazon.com/Kowa-BL8J1-Standard-32x82mm-Binoculars/dp/B000J42YDS/ref=pd_ecc_rvi_cart_1
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Pentax 12x50mm PCF WP II FMC/WP/FP
Pentax 16x60mm PCF WP FMC/WP/FP
Pentax 20x60mm PCF WP II FMC/WP/FP
Orion 12x63mm Mini Giant FMC/JAPAN
Orion 15x70mm Little Giant II FMC/JAPAN
Orion 16x80mm Giant FMC/JAPAN
Orion 20x70mm Little Giant II FMC/JAPAN
Orion 30x80mm MEGAView FMC/JAPAN
Barska 30x80mm X-Trail LW FC
Burgess Optical Series II 20x90mm FMC/WP/FP
Handel's Messiah**Hallelujah! For the LORD God Omnipotent Reigneth
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KennyJ
Reged: 04/27/03
Posts: 10080
Loc: Lancashire UK
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< 30x is more than enough magnification to start showing up defects like spherical aberration and astigmatism in poorly figured and/or aligned optics. That stuff is rather unpleasant to see and you don't notice it as much at low mag's.>
Milt , I'm glad someone else wrote that !
Had I written the same sentence , I would have probably have been accused of bino snobbery ! :-)
I also agree with your point about the figuring and correction of lens groups being more important than their status , classification or content , per se .
Although 30x is too low a magnification at which to usefully carry out star tests , it is high enough for the aberrations magnified and highlighted by the star test to affect the quality of image .
Then of course , with binoculars and spotting scopes as opposed to dedicated astro scopes , there is the what I was about to describe as being irrefutable optical disadvantage of the presence of prisms ( then I wondered about how the Kowas seem to presumably star test so well ! )
There is no doubt that when viewed through my little Televue scope , stars appear that all important bit crisper , tighter and tinier than they do in my Zeiss spotting scope .
Then again , I don't like reversed images !
Kind regards and clear skies
Kenny
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Two eyes and a preference to use both
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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SaberScorpX
Post Laureate
Reged: 01/12/05
Posts: 4120
Loc: illinois, usa
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re: We 'keep forgetting' about Stephen Saber, who owns and enjoys both the Barska 30x80mm X-Trail and the Orion 30x80mm MEGAView binoculars.
It's okay Stan. Different strokes.
Saber Does The Stars at
www.astronomyblogs.com/member/saberscorpx/
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Vincent33
member
Reged: 09/18/07
Posts: 95
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Quote:
but due to recent personal accusations of a rather unsavoury nature
Don't mind, Kenny ...
[...]
Back to the post, I can try to express myself better: a binoculars is usually a FIXED enlargement instrument.
Usually they are 7x or more, with a FOV from (say) 10° down.
And IMHO if an intrument with a FIXED enlargement of 15-20x can be used for various purposes, the more enlargement you have the less general usability uou get.
So I've nothing against high enlargement binoculars, why not a 40x90?, but (not talking here of quality, mounting et cetera) I would prefer FAR MORE a binoculars with interchangeable eyepieces, like the 100-90° with 20x, 30x, 37x, than a so at least specialized but fixed 30x or the like. Bye.
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