rb Series Wide Angle Lenses
50mm f/4.5
The 50mm f/4.5 is an ultra-wide lens exhibiting minimal distortion and extreme
depth of field, dramatically linking foreground and background subject matter.
Applications include landscape, architecture and photojournalism.
Equivalent to 25mm in 35mm format.
| Optical Construction |
11 elements/8
groups |
| Angle of View |
81° |
| Diaphragm |
Automatic |
| Minimum Aperture |
32 |
| Shutter |
Seiko #1 mechanical
lens shutter, 1~1/400 sec., T (time), X contact (flash synchronization at all
speeds) |
| Equivalent Focal
Length for 35mm |
25mm |
| Minimum Focusing
Distance |
11" / 279mm |
| Magnification |
0.88x |
| Area Covered |
2.5 x 3.1"
/ 63 x 79mm |
| Filter Size |
77mm |
| Lens Hood |
Slip-on |
| Dimensions (L
x W) |
2.9 x 3.7"
/ 73 x 94mm |
| Weight |
1 lb. 12 oz. /
780 g. |
65mm f/4
The 65mm f/4 is a wide angle lens with a 68° angle of view. It is the most
popular wide angle focal length in 6x7cm format. It renders natural perspective
with increased depth of field and angular coverage and provides the least amount
of distortion of the wide angle range for subjects at the edges of the frame.
It incorporates an adjustable floating element system for correction of edge sharpness
and distortion, especially at wide open apertures and close distances.
Applications include group portraits, wedding photography, and general purpose
wide angle photography.
Equivalent to 32mm in 35mm format.
| Optical Construction |
9 elements/8 groups |
| Angle of View |
68° |
| Diaphragm |
Automatic |
| Minimum Aperture |
32 |
| Shutter |
Seiko #1 mechanical
lens shutter, 1~1/400 sec., T (time), X contact (flash synchronization at all
speeds) |
| Equivalent Focal
Length for 35mm |
32mm |
| Minimum Focusing
Distance |
1' 1.7" /
348mm |
| Magnification |
0.7x |
| Area Covered |
3.2 x 3.9"
/ 80 x 100mm |
| Filter Size |
77mm |
| Lens Hood |
Slip-on |
| Dimensions (L
x W) |
4.2 x 3.8"
/ 106 x 97.2mm |
| Weight |
2 lbs. 6 oz. /
1,070 g. |
75mm f/4.5
The 75mm f/4.5 features an adjustable floating element system for correction of
edge sharpness and distortion, especially at wide open apertures and close distances.
Applications include precise perspective for architectural or industrial rendering
or table top photography.
Equivalent to 37mm in 35mm format.
| Optical Construction |
9 elements/7 groups |
| Angle of View |
61° |
| Diaphragm |
Automatic |
| Minimum Aperture |
32 |
| Shutter |
Seiko #1 mechanical
lens shutter, 1~1/400 sec., T (time), X contact (flash synchronization at all
speeds) |
| Equivalent Focal
Length for 35mm |
37mm |
| Minimum Focusing
Distance |
1' 2.9" /
379mm |
| Magnification |
0.61x |
| Area Covered |
3.7 x 4.5"
/ 92 x 114mm |
| Filter Size |
77mm |
| Lens Hood |
Slip-on |
| Dimensions (L
x W) |
5.7 x 4.3"
/ 96.4 x 97.2mm |
| Weight |
3 lbs. 12 oz.
/ 980 g. |
|