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Wes James
Carpal Tunnel
Reged: 04/12/06
Posts: 2423
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Hi, Kenny~
Thanks for popping in! Yeah, these would certainly not be binoculars for horizontal viewing. Kind of like trying to look straight up with conventional binoculars- only opposite! Even with a P-mount, I find overhead viewing uncomfortable... and, darn it- it seems like that's where I'm wanting to view a great deal of the time!
I know, Kenny- prices for optics there are really tough... I priced out a telescope one time from Orion UK, and decided it was just too expensive to get it over here. It's too bad there's not some means of fair world commerce- Whoops,  I think I'd better shut my mouth before I open a can of worms!
Wes
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rookie
sage
Reged: 01/14/06
Posts: 318
Loc: St. Petersburg, FL
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Quote:
Quote:
You just need a hair dryer!
Shirley,
What color do you recommend? 
Good one Stan, always have the nack for thinking out of the box. But do you mean the hair or the hair dryer? 
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Shirley
Celestron CPC 800XLT
G0 BT80~45degree; Fujinon 16x70 FMT-SX
Celestron Ultima 9x63 & Regal LX 10x42
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hallelujah
Carpal Tunnel
Reged: 07/14/06
Posts: 1638
Loc: Colorado Rocky Mt. High
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Hair dryer. 
My apologies, I seem to get silly, once a month, around the time of a full moon.
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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
Edited by hallelujah (07/16/08 08:54 AM)
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steveoid
sage
Reged: 02/10/08
Posts: 417
Loc: London,England
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Kenny, I think you took the right decision on that one you would probably end up with a walking frame. They are great for astronomy but not for daytime use plus with no central focussing mechanism birding and other such activities are a definite nono. The view through them is spectacular but they still tail of wards the periphery which for the price it is to be expected. I looked at albiero last night and the two colours were spot on with the yellow and blue showing up very well. M27 was easily seen even in my light polluted neck of the woods. Wes I know you will get loads of enjoyment from your 90 degree bins just from the fact you won’t come a way feeling the need for a neck brace. I think these are a good pair of binoculars, not the best in the world by any means but for the price and comfort they confer to the user then for me they are definite keepers. Steve
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Celestron C8
120mm ED Pro refractor.
80mm ED Pro refractor (solar observing)
Baader Herscel wedge.
Quantum 6- X20,X30 & X37 100MM binoculars.
Helios 10.5 x 70mm HD binoculars
Heq5 Pro mount.Eye pieces
Celestron ultima 2x barlow.
Numerous eyepieces.
FR/FC lens 6.3 Celestron.
2" WO Dielectric.
1/1/2" WO Dielectric.
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GlennLeDrew
professor emeritus
Reged: 06/18/08
Posts: 572
Loc: Ottawa, Ontario, Canada
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In the 88mm aperture version, which I'm pretty certain use identical prism assemblies, the relatively smallish rear prism aperture imposes a limit on the widest true field. Moreover, the focal position is only a quite small distance behind the rear prism aperture, which exacerbates this. And another consequence is that dust can be seen almost in focus during daytime observation.
For the 88's, the 20X eyepiece set has field stops as large as can be used before prism aperture-induced vignetting rears its ugly head. (In fact, the 32X oculars, with their wider AFoV, have true fields not too much smaller than the 20X jobs.)
You might find that the 16X oculars in the 70's, like the 20X for the 88's (with an AFoV of ~52 deg.), offer the lowest usable power if ridiculously small AFoV's are to be avoided.
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It is possible to use 1.25" telescope eyepieces with this series of RA bino if:
1) the field stop lies at or quite close to the bottom of the barrel,
2) the barrel is long enough place the field stop just about up against the rear prism aperture, and
3) you make a "shim" to widen the barrel. Even tape will do.
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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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