Can anyone translate this?

http://www.lzos.ru/astro_apohr.htm

Richard wrote:

http://www.lzos.ru/astro_apohr.htm

I knew that all this Russian I learned in school will come
handy someday, :-) Here is the translation, Richard:

-------------------------------------------------------------

Objectives - Apochromates

[PIC1]

The company produces lens apochromatic objectives with
improved color correction and diffraction quality images,
applied in astronomical proffesional and semi-professional
telescopes.

[PIC2]

A special glass type OK-4 is used in order to achieve the
ideal collor correction for the visible part of the spectrum.
The OAO LZOS [this is the company name] OK-4 glass, have
unique optical characteristics, and is no worse than fluorite.
Objectives guarantee image quality with standard deviation
[I'm not sure about the English term here, literally it says
"the average-squares deviation" and this is the way I know it
from school] of the wave front not bigger than 0.035 wavelength
(at wavelength of 532 nm).

[Title of the table] "Apochromatic objectives for professional
telescopes"

[The colums of the table]
Model,
Diameter,
Relative opening (which I assume is the Russian term for
F-ratio, here expressed in the format
number:number, instead of f/number)
Material (with the options "alimunum", "steel", and "spec.
alloy")
Total weight (in kg)
Price for 1 piece (USD, including VAT; where the price is
not given it says "in process of development")
Minimum order (pcs.)

Richard wrote
http://www.lzos.ru/astro_apohr.htm

Try the English version!
Http://www.lzos.ru/en/astro_apohr.htm

Denis
--
DT
Replace nospam with the antithesis of hills

this *might* work:

http://tinyurl.com/47gqj

Ed T.

Alexander Avtanski wrote:
A special glass type OK-4 is used in order to achieve the
ideal collor correction for the visible part of the spectrum.
The OAO LZOS [this is the company name] OK-4 glass, have
unique optical characteristics, and is no worse than fluorite.
Objectives guarantee image quality with standard deviation
[I'm not sure about the English term here, literally it says
"the average-squares deviation" and this is the way I know it
from school] of the wave front not bigger than 0.035 wavelength
(at wavelength of 532 nm).

My guess is that they mean RMS (root-mean-square) wavefront error, for
which 1/28 wave is in fact a good one. The Marechal criterion, for
instance, gives "diffraction limited" in terms of an RMS error of about
1/14 wave.

Brian Tung
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt