The Rodenstock Apo-Sironar Digital 120mm Lens is exclusively designed for macro use with digital backs, though they can also be used for digital SLRs. These Rodenstock photography lenses can be used with digital backs as digital backs need a smaller image circle with color correction, extreme resolution, and high performance at a large aperture.

• The range of sharpness of the Rodenstock Apo-Sironar Digital 120mm Lens extends from 1:5 to 2:1
• Rodenstock lenses can be used to capture a view that is similar to that obtained with a 50 mm macro lens mounted on a 35 mm format camera
• The lens has a high resolution and can be used with digital backs that have a maximum image area of 72 x 96mm
• It can produce a perfect 150 mm image circle at 1.1 magnification
• The range of the ideal working aperture is f/8 - 11
• These Rodenstock photography lenses accept 49 threaded filters
• The standard view coverage is 55 degrees
• Aperture and shutter speed can be controlled through a Rollei Lens Control unit, which has to be got separately
• The superior apochromatic optical design helps eliminate color fringing
• The dimensions of these Rodenstock lenses are 2.0 x 2.0"
• The weight of the lens is 7.8 oz
  
  

Lens: 120 mm f/5.6
Max. recommended film format: 72x96 mm
Shutter size: 0
Push-on mount Ø: 51 mm
Filter thread: M 49 × 0.75
Rear barrel Ø: 40.5 mm
Flange focal length: 236 mm
Flange focal end : 16.1 mm
Overall length: 49.8 mm
Weight w/Copal: 220 g
Shutter type and size: Copal 0
Shutter speeds range: B, T, 1/500 s … 1 s
Manual cocking: Yes
Self cocking: No
Mechanical: Yes
Electronic: No
x-synchronized: Yes
Screw thread: M 32.5 × 0.5
Lens board opening: 34.8 mm
Lens board thickness: 1.5 … 4.0 mm
Image scale: 1:5 - 2:1
Working f-stop: 8-11
Image angle: 55° - 24°
Image circle diameter: 150 mm
Movement range (vertical/horizontal) 37x49 mm: 53/48
                                                                         36x56 mm: 52/45
                                                                         40x54 mm : 50/45
                                                                          46x58 mm : 46/42
                                                                          72x88 mm : 25/22
                                                                           72x96 mm : 21/18