Ortho2000
sage
Reged: 01/09/07
Posts: 278
Loc: Northern Virginia
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There were some posts a few years back about the availability of a 120 mm equivalent of the BT 100-45. Namely a 120 mm Oberwerk style binocular with 45 or perhaps 90 degree 1 1/4 replaceable generic eyepieces .
The latter is very important for those of us with bags of eyepieces we want to use. I know there was a somewhat involved discussion by Kevin of Oberwerks, Markus Ludes of Germany, and EdZ. Apparently it was not clear that a 45 degree turret model with proprietary eyepieces was not the same as the classic Oberwerk model offered by Bigbinoculars, using of course generic replaceable 1 1/4 oculars.
Anyway..I am asking this because I may have a lead on a used Oberwerk BT-100-45. The potential introduction of a 120 model...depending on price ( and features of course such as ED, weight, etc.) might affect that decision.
Any information, if publicly available, would be appreciated.
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Ancient Orange Astro C-90 Celestron
Ancient Meade 2080 8 inch Schmidt-Cassegrain
Vixen ED115S APO 4 1/2 in Refractor & GPD2 Mount.
Meade ETX125 Mak
Unitron 60 mm F/15 Equatorial Refractor
Unitron 100 mm F/15 Equatorial Refractor
Stellarvue 80mm NHNG on Vixen Portamount
Meade 80mm DS-80AT F/11 GoTo Refractor (yardsale)
Vixen 16x80, Zeiss 10x40, Tasco #124 7x50 WA, Leitz 8x20 Roof Prism, Olympus 10x25 Roof Prism
Lunt 60mm Solar Scope on Order
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MIKADO
member
Reged: 03/21/06
Posts: 52
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I do not know for the USA, but in EUROPE we find this type of model recently. It ' acts of a directly imported model of China of diameter 120mm with 45 degree 1 1/4 replaceable generic eyepieces sold with tripod and ocular 25x and 40x.
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Ortho2000
sage
Reged: 01/09/07
Posts: 278
Loc: Northern Virginia
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Mikado wrote;
Quote:
I do not know for the USA, but in EUROPE we find this type of model recently. It ' acts of a directly imported model of China of diameter 120mm with 45 degree 1 1/4 replaceable generic eyepieces sold with tripod and ocular 25x and 40x.
Do you now which Chinese Manufacturer is making this 120 mm binocular that is like the Oberwerk BT-100-45 ?
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Ancient Orange Astro C-90 Celestron
Ancient Meade 2080 8 inch Schmidt-Cassegrain
Vixen ED115S APO 4 1/2 in Refractor & GPD2 Mount.
Meade ETX125 Mak
Unitron 60 mm F/15 Equatorial Refractor
Unitron 100 mm F/15 Equatorial Refractor
Stellarvue 80mm NHNG on Vixen Portamount
Meade 80mm DS-80AT F/11 GoTo Refractor (yardsale)
Vixen 16x80, Zeiss 10x40, Tasco #124 7x50 WA, Leitz 8x20 Roof Prism, Olympus 10x25 Roof Prism
Lunt 60mm Solar Scope on Order
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12591
Loc: Cumberland, R I , USA42N71.4W
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Quote:
Do you now which Chinese Manufacturer is making this 120 mm binocular that is like the Oberwerk BT-100-45 ?
See the Minireviews under Yunnan 120mm
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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Ortho2000
sage
Reged: 01/09/07
Posts: 278
Loc: Northern Virginia
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EdZ said;
Quote:
See the Minireviews under Yunnan 120mm
Thanks ! I totally missed that even though I read the threads going back way back even to 2005.
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Ancient Orange Astro C-90 Celestron
Ancient Meade 2080 8 inch Schmidt-Cassegrain
Vixen ED115S APO 4 1/2 in Refractor & GPD2 Mount.
Meade ETX125 Mak
Unitron 60 mm F/15 Equatorial Refractor
Unitron 100 mm F/15 Equatorial Refractor
Stellarvue 80mm NHNG on Vixen Portamount
Meade 80mm DS-80AT F/11 GoTo Refractor (yardsale)
Vixen 16x80, Zeiss 10x40, Tasco #124 7x50 WA, Leitz 8x20 Roof Prism, Olympus 10x25 Roof Prism
Lunt 60mm Solar Scope on Order
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Denis
sage
Reged: 12/24/05
Posts: 225
Loc: Rennes, France
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In france we have them recently :
http://www.galileo.cc/GALILEO-france/descriptif_instruments.php?ref=JUMGAL120MM
I seems the picture are a mix of BT 100 and some of the 120mm
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Canon 10x42 IS binoculars.
Meade sc 4" on homemade fork equatorial mount.
homemade 10" an 14" dobsonian
Nikon photogear.
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Ortho2000
sage
Reged: 01/09/07
Posts: 278
Loc: Northern Virginia
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I saw thew specs... Wow 20 kilograms. I am glad I saw that. I think I will stay with BT100 45
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Ancient Orange Astro C-90 Celestron
Ancient Meade 2080 8 inch Schmidt-Cassegrain
Vixen ED115S APO 4 1/2 in Refractor & GPD2 Mount.
Meade ETX125 Mak
Unitron 60 mm F/15 Equatorial Refractor
Unitron 100 mm F/15 Equatorial Refractor
Stellarvue 80mm NHNG on Vixen Portamount
Meade 80mm DS-80AT F/11 GoTo Refractor (yardsale)
Vixen 16x80, Zeiss 10x40, Tasco #124 7x50 WA, Leitz 8x20 Roof Prism, Olympus 10x25 Roof Prism
Lunt 60mm Solar Scope on Order
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MIKADO
member
Reged: 03/21/06
Posts: 52
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Hello BREIZ
I confirm there is a mixture of images.
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Joad
Wordsmith
Reged: 03/22/05
Posts: 11920
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Quote:
I saw thew specs... Wow 20 kilograms. I am glad I saw that. I think I will stay with BT100 45
Yep, at just under 50 pounds, this thing is a monster. I find the 26 pound 100mm 45°BT at the limit of what I can manage. Mounting these things in the dark is no joke.
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Mark9473
Carpal Tunnel
Reged: 07/21/05
Posts: 2703
Loc: 51°N 4°E
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Yes but what about having these in a roll-off-roof garden shed? Tempting!
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Mark
Leica 8x20; Vixen 8x42; Swift 8.5x44, 10x50 and 20x80; TS 7x50; Orion 15x63
WO Megrez II 80 FD + Baader 90° T2 Amici
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edwincjones
Post Laureate
Reged: 04/10/04
Posts: 4428
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or, a tripod on JML WheelyBars or ScopeBuggy.
edj
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n w arkansas
Binocular, Solar, General Amateur Astronomy
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grbrown
professor emeritus
Reged: 07/09/05
Posts: 643
Loc: Ampthill, UK, 52:02N 0:30W
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I have studied the French and Chinese links referred to and can only conclude that these look as if they are made by the same manufacturer as the BT100-45s we are all familiar with. However I suggest Albert's photos are the only ones we can trust - can you give us some more views of them please?
In fact I reckon the French website photos are all of BT100s, both early (post-mount) and later (cradle-mount) versions. It will be interesting to see if they update their photos when they have a real BT120 to hand!
The price from France is attractive at 1599 Euros - very tempting, but I will wait until I see some photos that are convincingly of a different model to the BT100s shown!
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Graham
"one eye good, two eyes better...the more I look, the more I see"
BT100-45 degrees, plus 35,24,17,13,9mm Sieberts
15x80, 7x50 Steiners
12x50, 10x42, 8x20 Leica Trinovids
7x35 Minolta
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Ortho2000
sage
Reged: 01/09/07
Posts: 278
Loc: Northern Virginia
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I am looking for a larger objective binocular, but if the weight is absurd, I will back off. Also, I prefer a slightly longer focal length. Short focal length binos have both advantages and disadvantages. The Myauchi Saturn III and Vixen 80 mm BT80A ?? units all have longer focal lengths allowing more magnification for planetary applications.
Anyway...for now.. it will be wait and see for me. I have an opportunity to perhaps buy a nice BT-100-45 Oberwerk, so that just might settle that for me.
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Ancient Orange Astro C-90 Celestron
Ancient Meade 2080 8 inch Schmidt-Cassegrain
Vixen ED115S APO 4 1/2 in Refractor & GPD2 Mount.
Meade ETX125 Mak
Unitron 60 mm F/15 Equatorial Refractor
Unitron 100 mm F/15 Equatorial Refractor
Stellarvue 80mm NHNG on Vixen Portamount
Meade 80mm DS-80AT F/11 GoTo Refractor (yardsale)
Vixen 16x80, Zeiss 10x40, Tasco #124 7x50 WA, Leitz 8x20 Roof Prism, Olympus 10x25 Roof Prism
Lunt 60mm Solar Scope on Order
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Mok Chong Kin
newbie
Reged: 01/12/06
Posts: 55
Loc: Macau
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Please see my black colour 120mm China made binoculars , they have F 6 focus length and can use all the 31.75mm eyepieces .
http://www.cloudynights.com/photopost/showgallery.php?cat=3104&password=paddakob&thumb=1
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Mok Chong Kin
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edwincjones
Post Laureate
Reged: 04/10/04
Posts: 4428
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Let me review my 25x150s in approximate size and weight:
binoculars 41#
G11 tripod 20#
UA Sirus Unimount 25#
counterweights 30#
large JMI Wheeley Bars 25#
total about 141#s
height (with P-mount level) 5-6'
circular footprint 7-8'
these take up a considerable area for use, storage, travel
edj
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n w arkansas
Binocular, Solar, General Amateur Astronomy
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