These two lenses are the most powerful zooms made by KERN, Swiss for the Reflex Bolex 16mm cameras.

They provide TTL (Thru-The-Lens) fully automatic exposure, semi-automatic exposure, or manual exposure settings.

Since their aperture system utilizes 2-bladed iris, mostly found in amateur cameras, the background bokeh they provide is not like the ones having more iris blades. For a beautiful bokeh use Kern prime (fixed-focus) lenses, or Angénieux or SOM-Berthiot/sopelem zooms specially made for the Bolex Reflex cameras.

VARIO-SWITAR 100 POE

Vario-Switar POE (3)

Vario-Switar POE (2)

Vario-Switar POE (1)

Vario-Switar POE zoom lever

VARIO-SWITAR 100 PTL

Vario-Switar PTL (4)

Vario-Switar PTL (3)

Vario-Switar PTL (2)

Vario-Switar PTL (1)

2-blade iris system
2-bladed iris aperture system
VARIO SWITAR 100 POE (also called POE-4) VARIO SWITAR 100 PTL
Focal length range

 

16-100mm 12.5-100mm
Zoom ratio

 

6 ¼ 8
Minimum aperture

 

f/16 f/16 (T/18)
Maximum aperture

 

f/1.9 f/2 (T/2.2)
Aperture blades

 

2 2
Field of View (horizontal)

 

34° x 5 ½ ° 41° x 5 ½ °
Minimum focusing distance

 

1.2 m (~4 feet) 1.2 m (~4 feet)
Filter size

 

Tiffen Series 9 Tiffen Series 9 with retaining ring

(Front thread M85 x 0.75 mm)

Batteries for exposure metering

 

1 x Mallory PX1 (discontinued) 1 x Mallory PX-13 (discontinued)
Batteries for power zoom

 

2 x Mallory RM1 (discontinued) 3 x Mallory RM1N or PX-1 (discontinued)
ASA (ISO) ratings

 

10 12 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500
Available with

 

C-mount or Bolex bayonet C-mount or Bolex bayonet
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