Industar 61 L/Z f/2.8 50mm Portrait Manual DSLR MACRO Lens M42 Mount Old Pentax
Normal fast lens with coated optics for SLR cameras with M42 thread. Made according to Tessar optical design
In its name Industar-61L/Z, the letter “Z” means “Mirror”
Focal length: 50mm
Field of view angle: 46°
Frame size: 24×36 mm
Number of lenses/groups: 4/3
Working distance - 45.5 mm
Relative opening: 1:2.8
Aperture scale limits: 1:2.8–1:16
Number of aperture blades: 6
Aperture adjustment: stepless
Preset aperture: yes
Near focusing limit - 0.3 m
Connections:
lens with camera - M42×1
for screw-in bits - M49×0.75
for snap-on attachments - ∅52 mm
Mounting location for filters: front
Resolution according to specifications (center/edge): 44/30 lines/mm
Weight - 131 g
The focus ring is located at a comfortable distance from the camera, quite wide and equipped with a convenient knurl.
There are no complaints about the focusing process (and the entire ergonomics of the lens). Everything is very convenient.
The helicoid travels 350 degrees. Almost a full revolution.
The aperture ring is located almost at the very edge and is not very wide. The ring is knurled, except for the upper part, on which the aperture values are marked.
The lens is equipped with a convenient single-ring preset aperture mechanism.