Cooke S4 Primes: Technical specifications
|
| |
Units |
18mm |
25mm |
32mm |
50mm |
75mm |
100mm |
| T-stop
range |
|
T2-T22 |
T2-T22 |
T2-T22 |
T2-T22 |
T2-T22 |
T2-T22 |
Maxi
format cover
|
30mm
Diameter (Super 35mm Format) |
Max
diagonal angle of view
(Super 35mm Format) |
°(Deg) |
80 |
62 |
50 |
34 |
22 |
17 |
Overall
length
(front of lens to image plate) |
mm-(ins) |
165
(6.5) |
165
(6.5) |
180
(7.0) |
177
(7.0) |
177
(7.0) |
193
(7.5) |
| Max
front diameter |
mm |
110 |
110 |
110 |
110 |
110 |
110 |
| Total
weight |
Kg
(lbs) |
1.75
3.85 |
1.6
3.5 |
1.85
4.0 |
1.5
3.3 |
1.75
3.85 |
2.0
4.4 |
| Focus
scales |
Two
opposing focus scales-Metric or footage |
| Min
object distance |
mm
(ins) |
inf-250
inf-9 |
inf-250
inf-9 |
inf-300
inf-12 |
inf-500
inf-20 |
inf-750
inf-30 |
inf-900
inf-36 |
Close
focus from
lens front |
(ins) |
2.5 |
2.5 |
6.0 |
13 |
23 |
28.5 |
Angular
ratio to
marked close focus |
°(Deg) |
200 |
200 |
300 |
300 |
300 |
300 |
| Focus
drive gear |
140
teeth 0.8 Metric module x 6.0mm wide(98mm from large plane |
| Iris
scales |
Two
opposing Linear T-scales-whole and third stops marked |
| Angular
rotation |
Total
rotation 91° (Deg) |
| Iris
drive gear |
114
teeth 0.8 Metric Module x 6.0mm wide (84mm from image plane |
Internal
front
fitting filter |
Internal
thread for Filter Adapter M10 x 0.75 pitch |
