The unit is solid brass, weighing an incredible 300 lbs, and is extremely well sealed (internal focusing) , so I'm somewhat reluctant to take the eyepiece off to send away for cleaning or polishing. I'd welcome any advice on whether it's a deposit of some kind or it's etched, what might work, and where I can get it. Thanks! Tom Body Sidney, BC CANADA
This sounds like a polishing job to me, though I hope I'm wrong. To re-polish a spherical lens without changing its profile requires making a small pitch lap, using the lens as a mold. (This refers to a lens from a magnifying optical instrument; spectacles etc. can be polished with less precision.) If the lens is aspheric, a more complex procedure is required. --Peter
Subject: Nikon 15 x 70
I was very interested to read about the Nikon having a 15 x 70 with 4 degree FOV particularly when it was decribed as being better than the 18 x 70 Astroluxe, which oddly ( given it's name ) is not officially recommended by Nikon for astronomy use. I would like to know more about this 15 x 70 as I cannot find any info on it anywhere and when I last contacted a rep. from the official Nikon website bemoaning the absence of a Nikon 15x 60 in their Superior E line , I was told the company had no plans to produce a 15x model and that all efforts in the design and marketing departments in that power range were being concentrated on the " exciting new 14 x 40 Vibration Reduction model " , which has since appeared on the market under the name Stabi -Eyes .
Incidentally , being currently in the process of giving serious consideration to buying an Image Stabilised bino , I was naturally drawn to the matter of how this new offering from Nikon might compare with the long established Fujinon 14 x 40 Techni -Stabi model. Comparisons of Technical specifications of these two models from two such competetive rivals on existing websites make VERY interesting studying, particularly for those with an eye for detail and capability of converting grammes to ounces and millimetres to inches. A real life side -by comparison is beyond the realms of possibility for myself at present , but I suspect it might make a very interesting and eye -opening project ( pun not intended ) for anyone who can actually get hold of one of each .
Regards to all - Kenny .
The 15 x 70 was not sold in the U.S., as far as I know. I'd read of it, and saw one in Japan. I have no specific details on it & only used it for a short time. I did write, 'It is better than the Nikon 18 x 70', but that was my impression after a short trial indoors in the daytime, and is not an indication of superiority in an objective sense.
No one I know has tried the Nikon Stabilized model. --Peter
Well, one translation a list.
Here goes another one, on a visit to Norinab in Sweden.
For those of you, who are not so deep into artillery, AB Bofors is a major supplier of cannons and related military equipment to the swedish armed forces. Even today.
They are a major european private company in fields of military supplies.
Some may remember, that they were involved in a major incident of fraud and bribe in India in the early nineties, all connected to a delivery of artillery to India.
It is new to me, that they actually housed the Norinab factory, or rather tool, shop in the twenties.
The danish authorities helped Zeiss around 1920, when the factory in Sweden was established, by providing Mr Forstman of the Zeiss office in Berlin, with a free travel permit through Denmark without any limitations. At this time, 1921, Mr Forstman, most likely, is allready in Holland