|
|
|
 |
| Xenon
1:1.9 / 50 mm |
 |
| Picture
courtesy Colin Johnson Collection |
OPTO-MECHANICAL
DATA
(with lens focused at infinity) |
| Recommended
Format (negative) Size |
23.5
X 23.5 mm |
28.1
X 28.6 mm |
24
X 36 mm |
|
Lens Elements,
Groups
|
6,
4
|
6,
4
|
5,
4 or *6, 4
|
|
Filter Mounting
Thread
|
M 45 X 0.75
|
M 52 X 0.75
|
M 38 X 0.75 or
*M 49 X 0.75
|
|
Max. f/#
|
16
|
22
|
22
|
|
Push-On Filter
Size
|
48mm
|
54mm
|
43mm or *51mm
|
|
Max. Outer Diameter
|
51mm
|
57.5mm
|
54mm or *60mm
|
|
Weight
|
200g
|
210g
|
250g or *220g
|
|
Overall Length
|
54mm
|
48mm
|
37mm or *49mm
|
IMAGE
DATA
(with
lens focused at infinity) |
|
Recommended Format
(negative) Size
|
23.5 X 23.5 mm
|
28.1 X 28.6 mm
|
24 X 36 mm
|
OPTICAL
DATA
(with lens focused at infinity) |
|
Effective Focal
Length (F')
|
51mm
|
51mm
|
50mm or *51mm
|
|
Back Focal Length
(S'F')
|
37.2mm
|
37.2mm
|
27.5mm or *37.2mm
|
|
Principal Point
Separation (HH')
|
-4.5mm
|
-4.5mm
|
3mm or *-4.5mm
|
|
Shortest Image
Distance (S'O')
|
0.34m
|
0.6m
|
0.75m or *0.5m
|
|
