Vintage Russian Poros (1 Viewer)

C

Cluster

Well-known member

• Apr 29, 2012

• #1

I have a pair of Russian Poros in 8x30. These are labelled in a Russian character set that looks like БПЦ4.
They are very well made and have coated lenses. They have a nice wide FOV and a reasonably sized sweet spot with surprisingly sharp detail within that spot. The view is a little dim and is strongly green tinted.

The tint is quite objectionable, but otherwise they are nice. I wondered if any knew if the tint and performance of later models (6nu5, 6nu6 etc) had improved any?

Dave..

 

N

newfie ghost

Well-known member

• Apr 29, 2012

• #2

Sounds interesting, can you please post a pic?

 

Simon S

Well-known member

• Apr 29, 2012

• #3

The Russian models I own all have this tint some to a lesser degree. Not sure about later models.

 

N

newfie ghost

Well-known member

• Apr 29, 2012

• #4

Simon S said:

The Russian models I own all have this tint some to a lesser degree. Not sure about later models.

Click to expand...

Nice collection Simon, thanks for posting

 

C

Cluster

Well-known member

• Apr 30, 2012

• #5

Thanks for the info Simon. It does put me off trying other pairs.

Dave

 

A

Arek

Well-known member

• May 6, 2012

• #6

The yellow-green tint of the Russian binoculars is caused by the simple and not so effective single-layer MgF2 coatings. Here you have the article with explanation and transmission graph for BPC5 model:
http://www.allbinos.com/160.1-article-Colour_rendering_in_binoculars_and_lenses.html

 

N

normjackson

Well-known member

• May 6, 2012

• #7

Though the yellow of the KOMZ 7x30 seems to be caused by a nice primrose yellow element in the eyepiece :
http://web.archive.org/web/20070805080500/http://binofan.home.att.net/komz.htm

 

A

Arek

Well-known member

• May 6, 2012

• #8

I have not used KOMZ 7x30 so I can not say anything about it. However I have two pairs of Polish PZO 6x30. The first one is older and has no antireflection coatings at all and gives natural color rendition. The younger model has single layer MgF2 coatings and gives strong yellow hue.

 

Simon S

Well-known member

• May 7, 2012

• #9

Indeed it does seem to be caused by the lens between the field and eye lenses.