Carl Zeiss Jena Biotar 58mm f/2 (picture heavy!)

[John Geerts]

If your lenses are M39 thread and made for Russian SLR like my version they can only be used for close distance on a F-mount body. But using a M39 to M42 ring (it is a ring without any flange) and then a M42 adapter for Z-mount it can focus to about 10m or so.

There is a direct M39-Z adapter   https://www.kentfaith.com/KF06.389_m39-lenses-to-nikon-z-mount-camera-adapter

[MEPER]

There is a direct M39-Z adapter   https://www.kentfaith.com/KF06.389_m39-lenses-to-nikon-z-mount-camera-adapter

I have one of those adapters. It is for LTM (like Leica rangefinder lenses) and it works perfect using a e.g. Jupiter-8 50/2 lens which is a rangefinder lens. But the M39 Helios 44 I have is not a rangefinder lens but a SLR lens so register distance does not fit using the adapter above. Some additional distance is needed.

[MEPER]

I found out with some google search the different lens registrations:

M42 adapter: 45.46 mm
M39 Soviet SLR lenses: 45.2 mm
LTM (39 mm): 28.8 mm
T2 adapter: 55 mm

The above confirms using a M39 Helios-44 using M42 adapter via a M39-M42 ring that it is 0.26 mm from reaching infinity focus. 

[Petr sheepeck Jůza]

Should I go or not..... Small boy pondering following his older brother.  :-)

[Petr sheepeck Jůza]

Swirly character.

[CS]

Is that a glass background, or am I looking at lens bokeh?

[golunvolo]

Those are beautiful portraits. Marks the character and emotions.

[Petr sheepeck Jůza]

Bokeh. There is a tree on the right side. The bark looks interesting, doesn’t it?

[CS]

Bokeh. There is a tree on the right side. The bark looks interesting, doesn’t it?

Yes.