gatorengineer
Carpal Tunnel
Reged: 02/28/05
Loc: Hellertown, PA
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WO Optics 10x50 ED triplets?????
#2161555 - 02/01/08 08:54 PM
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Was poking around and came across this.....
http://www.adorama.com/WO1050ED.html?sid=12019166741192570
Anyone know if these really are triplets? The WO site doesnt say. Are these the Fuji knock-offs with ED or something else?
Its interesting to see that they are not recommended for astro on the WO site....
Bottom line anyone try them?
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JimB
member
Reged: 01/17/06
Loc: Northy part of Ireland !
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Re: WO Optics 10x50 ED triplets?????
[Re: gatorengineer]
#2162242 - 02/02/08 05:18 AM
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They certainly look very similar to the Fuji's ... excellent price and very tempting if they are upto Fuji quality especially since they ship to the UK all in £170gbp ($338usd) and for the Fuji I'd have to pay about £600gbp here in the UK ... mmnnn
Review on the 7x50 ...
http://www.cloudynights.com/ubbthreads/showthreaded.php/Cat/0/Number/694293/page/0/view/collapsed/sb/5/o/all
Same thing on WO site
http://www.williamoptics.com/REVIEWS/TelescopeReviews_WilliamOptics7x50EDBinocularMinireview.pdf
Edited by JimB (02/02/08 05:48 AM)
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EdZ
Professor EdZ
Reged: 02/15/02
Loc: Cumberland, R I , USA42N71.4W
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Re: WO Optics 10x50 ED triplets?????
[Re: JimB]
#2162315 - 02/02/08 07:25 AM
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Also see the review of the General Hi-t 10X50.
Here's a photo of the objective lens in the WO7x50. it appears to be a doublet.
Laser showing objective lens of WO7x50.
My assessment of # of elements is 2
It may be ED glass, but if I recall there was some question about where the ED glass was, in the objective or in the eyepiece.
This thread deals with the question posed to WO
WO 10x50 ED Binos 9-10-06
where you will find this comment
http://www.cloudynights.com/ubbthreads/showflat.php?Cat=0&Number=1142276&page=0&view=collapsed&sb=5&o=all&vc=1
WO 10x50 ED Binos
Because of this thread and my own interest in the WO 10x50 ED, I enquired through WO's website as to the use of ED glass in this model. At their website, in the buying page for this binocular, it does state that ED glass is used. Their reply to my enquiry: "We use Extra-low dispersion glass in binocular eyepieces." I think that we're accustomed to thinking that ED glass, when advertised, is used in the objective lenses (this is what I specifically asked). Anyway, I'm still interested (still a good price) and hope that a user can provide observations.
SteveF16
Here's a thread about testing objectives.
Doublets and Triplets pictures
And finally, here's a thread discussing the WO ED binoculars, use of ED glass in binoculars in general
anyone seen this from W.O. 3-19-07
In reviewing all these threads, I found that I made special note at one time that William Optic never listed this as a tripet in their own website ad copy. They did list it as a ED semi-Apo binocular.
edz
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Joe Ogiba
Postmaster
Reged: 02/14/02
Loc: NJ USA
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Re: WO Optics 10x50 ED triplets?????
[Re: gatorengineer]
#2162509 - 02/02/08 09:59 AM
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They look just like the Garrett Optical 10x50 HD-WP Signature Series binocular .
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EdZ
Professor EdZ
Reged: 02/15/02
Loc: Cumberland, R I , USA42N71.4W
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Re: WO Optics 10x50 ED triplets?????
[Re: Joe Ogiba]
#2162532 - 02/02/08 10:12 AM
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They look just like the Garrett Optical 10x50 HD-WP Signature Series binocular .
I'm sure that would be correct. In fact, a good look down thru the objectives shows the WO 7x50 internal prism shelf assembly is identical to the Obewerk Ultra 15x70 prism shelf. We already know that the Oberwerk Ultras and the Garrett Signatures are the same breed. That would then mean the Oberwerk Ultra Series 10x50mm is also the same binocular.
edz
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Mr. Bill
Postmaster
Reged: 02/09/05
Loc: Northeastern Cal
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Re: WO Optics 10x50 ED triplets?????
[Re: EdZ]
#2163056 - 02/02/08 02:42 PM
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EdZ...
Neat trick using the green laser to examine lens and spacings.
Tried it on my BTs...looks just like your photo.
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SteveF16
member
Reged: 01/07/05
Loc: California, USA
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Re: WO Optics 10x50 ED triplets?????
[Re: Mr. Bill]
#2163650 - 02/02/08 07:48 PM
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A thread that began 9/12/07 included mention of that binocular:
"I have it, and I also have a Fujinon 10x50 FMT ...(WO) is in several ways similar to the Fujinon. Both are well-built, wide-angle (65-degree AFOV), and I think both have enough eye relief for eyeglass wearers (if eyecups are rolled down). Their center-field resolution appears to be the same to me; neither showed me more than the other.
"The differences I see between them: (1) The Fujinon has noticeable chromatic abberation (known for that), whereas the WO shows less. (2) The Fujinon is sharp to about 90% from center, while the WO's sharp zone is about 60-70% from center. (3) The WO's eye-relief is a little less than the Fujinon's (I don't wear eyeglass, and the Fujinon can give me "kidney-beaning")."
As per Edz' comment, I also have never seen "triplet" mentioned in relation to the WO 10x50 ED. I suspect that the ad page that was linked in the starting post is in error.
Edited by SteveF16 (02/02/08 07:49 PM)
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dOP
journeyman
Reged: 12/07/07
Loc: Portugal
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Re: WO Optics 10x50 ED triplets?????
[Re: Mr. Bill]
#2163656 - 02/02/08 07:50 PM
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WO say it's a doublet and also say they're using ED glass in the objectives. I bought one of those and I asked them. I can't confirm that yet.
Quote:
excellent price and very tempting if they are upto Fuji quality especially since they ship to the UK all in £170gbp ($338usd) and for the Fuji I'd have to pay about £600gbp here in the UK ... mmnnn
Please note that you would be importing a product from outside UE. You will pay VAT plus a tax for importing this particular product (4,2% for binoculars) plus other taxes, all that on top of the price of the product ADDED to the shipping fees. It can get really expensive very quickly. You will also need to wait from a few days to 3 or 4 weeks until your package is processed by customs.
If you can, buy from inside UE.
Edited by dOP (02/02/08 08:06 PM)
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SteveF16
member
Reged: 01/07/05
Loc: California, USA
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Re: WO Optics 10x50 ED triplets?????
[Re: dOP]
#2163678 - 02/02/08 07:59 PM
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dOP posted while I was searching further. He is, of course, correct.
On 9/14/07, it was posted:
"Well, ... I've placed an order for the 10x50ED and asked again on the use of ED glass. Their web page is now slightly different from when I first viewed them; it now states, "Extra-low dispersion (ED) glass objectives for an exceptional color correction." And, in their response to me, they stated, "Yes, the ED is in our objective lens." So, I now have a consistent statement. "
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JimB
member
Reged: 01/17/06
Loc: Northy part of Ireland !
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Re: WO Optics 10x50 ED triplets?????
[Re: SteveF16]
#2164580 - 02/03/08 08:26 AM
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.... even with VAT, Customs and allowing some extra I reckon it would still be under £300 to land cleared ... still tempting for 10x50ED's if they're real good and are up to the Fuji's quality ... of course there's always the AudubonED 8.5x44 for £289 ... decisions, decisions ?
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dOP
journeyman
Reged: 12/07/07
Loc: Portugal
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Re: WO Optics 10x50 ED triplets?????
[Re: JimB]
#2164622 - 02/03/08 09:07 AM
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Yes, it would probably be under £300. I also ordered from WO (California) but there are some stores in UE with this model available, you can check the price if you want. If I could go back, I'd buy in Europe, it doesn't worth the trouble of importing them.
From what I've read, it's a fine instrument, with a mechanical construction and optical performance near to the Fujinon. Don't expect it to beat the Fujinon though. On the other hand, you pay 50% more for the Fuji and only get a 5% better product (or something like that).
Maybe I'm wrong but I believe this model wasn't developed by the Chinese. It is a copy of the Fujinon FMTR-SX. A copy can never beat the original, if it could, it would be a perfected version, not a copy!
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EdZ
Professor EdZ
Reged: 02/15/02
Loc: Cumberland, R I , USA42N71.4W
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Re: WO Optics 10x50 ED triplets?????
[Re: SteveF16]
#2164650 - 02/03/08 09:22 AM
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Quote:
On 9/14/07, it was posted:
"Well, ... I've placed an order for the 10x50ED and asked again on the use of ED glass. Their web page is now slightly different from when I first viewed them; it now states, "Extra-low dispersion (ED) glass objectives for an exceptional color correction." And, in their response to me, they stated, "Yes, the ED is in our objective lens." So, I now have a consistent statement. "
The laser test shows an IDENTICAL presentation in the WO 7x50 ED and the Fujinon 10x50 FMT-SX, both showing the beam shaft in two elements. By Roland Christen's explanation of the laser test, the green laser would NOT be visible in an ED element. I'm seeing the laser visible in both elements.
edz
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SteveF16
member
Reged: 01/07/05
Loc: California, USA
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Re: WO Optics 10x50 ED triplets?????
[Re: EdZ]
#2165353 - 02/03/08 02:29 PM
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Thanks for that information, Edz.
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Mark9473
Postmaster
Reged: 07/21/05
Loc: 51°N 4°E
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Re: WO Optics 10x50 ED triplets?????
[Re: EdZ]
#2165476 - 02/03/08 03:36 PM
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Quote:
By Roland Christen's explanation of the laser test, the green laser would NOT be visible in an ED element.
I thought that was a test to distinguish fluorite crystal (no beam visible) from fluoride ED glass (beam visible).
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EdZ
Professor EdZ
Reged: 02/15/02
Loc: Cumberland, R I , USA42N71.4W
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Re: WO Optics 10x50 ED triplets?????
[Re: Mark9473]
#2167693 - 02/04/08 03:14 PM
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Quote:
Quote:
By Roland Christen's explanation of the laser test, the green laser would NOT be visible in an ED element.
I thought that was a test to distinguish fluorite crystal (no beam visible) from fluoride ED glass (beam visible).
You are correct. I reviewed the original discussion. The green laser disappears completely ONLY in crystalline flourite. Both crown and ED glass will show up. So this test is not definitive to determine if ED glass is present.
edz
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