Rodenstock Apo-Sironar-digital 55mm
Both lens series Apo-Sironar digital and Apo-Macro-Sironar digital (the latter is optimized for large scales) provide large image circles and leave enough space for camera movement. 
These lenses are ideal for use with digital scan backs as well as with chip backs having larger formats or for being used in the macro-scan mode for larger formats by stitching multiple shots made with laterally shifted back from one shot to the next.
Technical Data:
| Recommended cameras |
ALPA, Cambo, Linhof |
| Recommended working f-stop |
8-11 |
| Recommended scale range |
∞ – 1/5 |
Movement ranges at sensor sizes:
| Image circle for scale ∞ |
125mm |
| 37x49mm |
↑→ 39/35 |
| 40x54mm |
↑→ 36/32 |
| 472 x 96 mm Line Scan |
↑→ 4/3 |
Dimensions and weights:
| Push on diameter |
70mm |
| Filter thread |
E67 |
| Rear mount diameter |
60.0 mm |
| Flange focal length at scale ∞ (Copal version) |
67.6 mm |
| Flange to lens end (Copal version) |
32.0 mm |
| Overall length |
73.8 mm |
| Weight (version Copal) |
400 g |
Shutter Types:
| Copal 0 |
|
| Control mode |
Mechanical |
| Shutter speeds range |
B, T, 1/500-1s |
| f-stop range |
4.5-45 |
| Rodenstock eShutter 0 |
|
| Control mode |
Electronic |
| Shutter speeds range |
T, 1/125-32s |
| f-stop range |
4.5-45 |
Accessories:
| Focus mount (dimensions and weights in version Copal) |
|
| Focusing range with Focus Mount |
∞ – 0.9 m |
| Flange focal length at scale ∞ with Focus Mount |
48.9 mm |
| Flange to lens end with Focus Mount |
13.3 mm |
| Weight, lens with Focus Mount |
525 g |
| Centerfilter, Exposure correction -2,5 f-stops |
|
| Mounting thread |
– |
| Front thread |
– |
