A Kiev-mount Jupiter-12 suffers from flare

[tho60]

Hello!

I have tested a J-12 wide-angle lens, which I bought recently with a Kiev-2 camera and a Jupiter-11. The serial number is #621917, a silver-barrel lens from Arsenal plant. In the pictures you can see severe flare, even in most common situations (i.e. there is not any light source within the frame). How to overcome this problem?

Thanks!

 

[Sonnar Brian]

Check for haze, especially on each side of the aperture. The rear group unscrews, allowing access to clean those surfaces.

The J-12 flares easily, but not this easily.

 

[t6un]

This is typical for some of the older lenses that have very bright looking blue coatings. Only remedy I know of is B&W film + yellow filter.

 

[Sonnar Brian]

My 1960 J-12 showing flare, source is the Windows behind the Space Shuttle allowing direct sunlight into the room.

The level is much less than your copy.

Another shot, some bright highlights without flare.

 

[tho60]

This is typical for some of the older lenses that have very bright looking blue coatings. Only remedy I know of is B&W film + yellow filter.

Unfortunately, this is the case. I have an other J-12 from 1970 with amber coating, which works flawlessly. The common opinion is that earlier FSU lenses are better

Where can I the lens get recoated?

 

[ImpMan71]

I don't know if you have seen this, or if it is a possible cause:
http://kiev4.narod.ru/tutorial/kiev4_02_e.html
If you scroll down towards the bottom of the page & read below the title "improvement" he explains how he cured it.
Good luck with it.

 

[David Hughes]

I don't know if you have seen this, or if it is a possible cause:
http://kiev4.narod.ru/tutorial/kiev4_02_e.html
If you scroll down towards the bottom of the page & read below the title "improvement" he explains how he cured it.
Good luck with it.

Hi,

Thanks for this link; a very interesting site from our Russian colleague. I love the rear lens cap from a yoghurt jar but have used a 35mm film tub myself (until I could afford the genuine article).

This page is good http://kiev4.narod.ru/tutorial/kiev4_e.html

Regards, David

 

[fanshaw]

Hi,



This page is good http://kiev4.narod.ru/tutorial/kiev4_e.html

Regards, David

Yes, I like this comment: " Test shots shew that even in case of very difficult objects such as grass or branches Jupiter-3 created the least disgusting picture in the blur area".

 

[ImpMan71]

That bit made me chuckle too

 

[Keith]

J-12's are cheap and should be because they're a pretty ordinary lens. I have one that I've used a couple of times on my Kiev ll and if you like flare for effect this is the lens IMO.

 

[tho60]

Thank you for your posts. They are very useful.

 

[wolves3012]

One thing that no-one has commented on (and I'm not sure how relevant it is) is that the rear element is supposed to be blacked around the edge. If the black paint is worn off over time, how does this affect the lens performance?

 

[julio1fer]

That is a very important issue. The edge of that rear element MUST be black, or you'll get all kinds of strange results with strong highlights.

I solved flare problems in my M39 mount J-12 by repainting the edge with black felt marker.