Help to identify these filters

[absalom1951]

Need help identifying these filters. Picked them up sometime ago . I believe the top one is a ND filter .The one marked F-1734 is clear . The 2X and 1.4 x are yellow. The 1.4 is very light yellow , while the 2x is a light yellow but slightly darker than the 1.4 . Any help would be appreciated. Thanks

 

[gorbas]

Made by KMZ, USSR and Russian company famous for their Zenit and Zorki camera models. Cyrillic lettering. Yes, you figured it out right!

 

[absalom1951]

Thank you for the reply. They are very robust filters-built for the long haul.

 

[AgX]

F-1734 is not a filter.

 

[absalom1951]

Could you please tell me the usage of F-1734 ? thanks

 

[AgX]

It is a convex lens of 1734mm focal length.

 

[locutus]

Isn't that effectively a closeup diopter?

 

[AgX]

For 35mm that term sounds a bit awkward, but technically it is. Quite some lenses cannot be focused down to 1.7m.