Simon S
Well-known member
I have posted a review of the Nikon Porro's through the years.
http://www.youtube.com/watch?v=1QJJINUPXa4
http://www.youtube.com/watch?v=1QJJINUPXa4
I have posted a review of the Nikon Porro's through the years.
http://www.youtube.com/watch?v=1QJJINUPXa4
This is something I've never quite figured out: surely the lack of waterproofing of the porros is just a marketing decision? I mean the difference between a porro and a roof is just the shape of the prism inside. How can this influence the ability to waterproof the outside?Waterproofing isn't a high priority for me, but I as you mentioned in the video, it is for many birders, and I think that's the main reason why the SE and EII are not more widely used by birders, who instead buy roofs with similar optical quality that cost three to four times more.
This is something I've never quite figured out: surely the lack of waterproofing of the porros is just a marketing decision? I mean the difference between a porro and a roof is just the shape of the prism inside. How can this influence the ability to waterproof the outside?
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Jan
The technology exists, it just requires adoption by the makers http://www.daiwa.com/reel/pop_magsealed.aspxSealing the moving surfaces is tricky and the tighter you seal these surfaces the harder it is to focus the bins.
The technology exists, it just requires adoption by the makers http://www.daiwa.com/reel/pop_magsealed.aspx
(it works well, in case you were wondering! )
Indeed there are many eye focusing porros that are waterproof, including the Pentax Marine and Nikon Prostar/ tropical. Central focus is however what everyone wan't in a portable binocular.Dear all,
During WW-2 many porro binoculars were produced that were 100% waterproof. Some examples: the Westinghouse 6x30 in Bausch and Lomb construction with individual eyepiece focussing. I immersed on of them 60 years after it was made in a bucket filled with water and left it there for 24 hours. Not a single molecule of water had entered. After that experiment the binocular went for six months to the tropics under very ot and huid circumstances and no water or fungi came in the instrument. Very famous absolutely waterproof Porro's were the bronze U-boat binoculars, which stayed waterproof during dives several meters under the surface of the ocean.
Gijs