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<blockquote data-quote="Kevin Purcell" data-source="post: 1297516" data-attributes="member: 68323"><p>I see the British phrase (I should know that!) is "open hinge" rather than "open bridge"</p><p></p><p><a href="http://www.sherwoods-photo.com/optisan_open_hinge_binoculars/optisan_binoculars.htm" target="_blank">http://www.sherwoods-photo.com/optisan_open_hinge_binoculars/optisan_binoculars.htm</a></p><p></p><p><a href="http://www.birdnet.co.uk/binoculars/optisan.html" target="_blank">http://www.birdnet.co.uk/binoculars/optisan.html</a></p><p></p><p>The "official name" seems to be Optisan OH or Optisan Open Hinge or Optisan Open Hinge Tech binocular.</p><p></p><p>I doubt they have ED glass as there is no mention in the ad and price is £170 to £180. Interestingly the range is only £10 between the 8x32, 8x42 and 10x42. </p><p></p><p>The claimed field for the 8x32 and 8x42 is 129m@1000m or 7.5 degrees but they say the 10x42 has a 140m field ... I don't think so. See below for a correction.</p><p></p><p>EDIT:</p><p></p><p>These are the distributors in the UK with more detailed specs</p><p></p><p><a href="http://www.marchwooduk.co.uk/viewprod_90_0_0_Optisan.html" target="_blank">http://www.marchwooduk.co.uk/viewprod_90_0_0_Optisan.html</a></p><p></p><p><a href="http://www.marchwooduk.co.uk/products_675_90_Optisan-Open-Hinge-8x32-Binocular.html" target="_blank">http://www.marchwooduk.co.uk/products_675_90_Optisan-Open-Hinge-8x32-Binocular.html</a></p><p></p><p>Comments in <strong>bold brackets</strong>.</p><p></p><p>Model OH PRO 8x32</p><p></p><p>* Magnification 8x</p><p>* Objective lens diameter (mm) 32</p><p>* Exit pupil (mm) 4</p><p>* Eye relief (mm) 17.5</p><p>* Field of view (ft/1000yds m/1000m) 420ft/140m <strong>[8 degrees]</strong></p><p>* Field of view (degree) 7.5 <strong>[say what? which is it?]</strong></p><p>* Close focusing distance (ft/m) 13.12/4</p><p>* Interpupillary distance (mm) 56-78</p><p>* Dioptric compensation (dpt)-4/+4</p><p>* Prism Bak 4 with phase coating (OH PRO PC)</p><p>* Coating ETE-Microlux Fully multi coated</p><p>* Focusing system Center focus, Dioptric correction integrated</p><p>* Housing Semi-Aro Thermotech 98 Body, Lab dry nitrogen filled</p><p>* Eyecup 3-step twist up eyecup</p><p>* Watertightness Watertight to depth of 1.2m <strong>[JIS 6?]</strong></p><p>* Dimensions 121x134x46</p><p>* Approx weight (g/oz) 552/19.46</p><p>* Tailored water resistant protective case</p><p>* Neoprene strap </p><p></p><p>So what is the FOV? The Sherwood site is wrong. The distributor specs are inconsistent. 8x32 and 8x42 Field of view (ft/1000yds m/1000m) 420ft/140m i.e. 8 degrees but they say 7.4 degrees. The 8x42 is 387ft/129m and 7.4 degrees. And the 10x42 is 387ft/129m or 7.4 degrees. The exit pupil for the 8x42 and 10x42 are both wrong too. So which part of the spec is correct?</p><p></p><p>One interesting observation: the specs mention "Coating ETE-Microlux". That's the same coating name used by Hawke. From the same OEM maybe?</p></blockquote><p></p>
[QUOTE="Kevin Purcell, post: 1297516, member: 68323"] I see the British phrase (I should know that!) is "open hinge" rather than "open bridge" [url]http://www.sherwoods-photo.com/optisan_open_hinge_binoculars/optisan_binoculars.htm[/url] [url]http://www.birdnet.co.uk/binoculars/optisan.html[/url] The "official name" seems to be Optisan OH or Optisan Open Hinge or Optisan Open Hinge Tech binocular. I doubt they have ED glass as there is no mention in the ad and price is £170 to £180. Interestingly the range is only £10 between the 8x32, 8x42 and 10x42. The claimed field for the 8x32 and 8x42 is 129m@1000m or 7.5 degrees but they say the 10x42 has a 140m field ... I don't think so. See below for a correction. EDIT: These are the distributors in the UK with more detailed specs [url]http://www.marchwooduk.co.uk/viewprod_90_0_0_Optisan.html[/url] [url]http://www.marchwooduk.co.uk/products_675_90_Optisan-Open-Hinge-8x32-Binocular.html[/url] Comments in [B]bold brackets[/B]. Model OH PRO 8x32 * Magnification 8x * Objective lens diameter (mm) 32 * Exit pupil (mm) 4 * Eye relief (mm) 17.5 * Field of view (ft/1000yds m/1000m) 420ft/140m [B][8 degrees][/B] * Field of view (degree) 7.5 [B][say what? which is it?][/B] * Close focusing distance (ft/m) 13.12/4 * Interpupillary distance (mm) 56-78 * Dioptric compensation (dpt)-4/+4 * Prism Bak 4 with phase coating (OH PRO PC) * Coating ETE-Microlux Fully multi coated * Focusing system Center focus, Dioptric correction integrated * Housing Semi-Aro Thermotech 98 Body, Lab dry nitrogen filled * Eyecup 3-step twist up eyecup * Watertightness Watertight to depth of 1.2m [B][JIS 6?][/B] * Dimensions 121x134x46 * Approx weight (g/oz) 552/19.46 * Tailored water resistant protective case * Neoprene strap So what is the FOV? The Sherwood site is wrong. The distributor specs are inconsistent. 8x32 and 8x42 Field of view (ft/1000yds m/1000m) 420ft/140m i.e. 8 degrees but they say 7.4 degrees. The 8x42 is 387ft/129m and 7.4 degrees. And the 10x42 is 387ft/129m or 7.4 degrees. The exit pupil for the 8x42 and 10x42 are both wrong too. So which part of the spec is correct? One interesting observation: the specs mention "Coating ETE-Microlux". That's the same coating name used by Hawke. From the same OEM maybe? [/QUOTE]
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