Specifications#
- Brand
- Mamiya
- Model
- ZD
- Camera type
- Medium-format digital
- Lens mount
- Mamiya 645
- Sensor size
- 49.9 × 33.3 mm (Medium format 44 × 33 mm)
- Crop factor
- 0.72×
Specifications merged from Wikidata and Lensfun. Spot an error? Tell us.
Sensor size compared#
Focal length equivalents & field of view#
Multiply any focal length by 0.72 to get the full-frame field of view. Angles are for a rectilinear lens focused at infinity.
| Lens on this camera | Full-frame equivalent | Horizontal | Vertical | Diagonal |
|---|---|---|---|---|
| 21 mm | 15 mm | 99.9° | 76.8° | 110.0° |
| 23 mm | 17 mm | 94.7° | 71.8° | 105.1° |
| 28 mm | 20 mm | 83.4° | 61.5° | 94.0° |
| 32 mm | 23 mm | 75.9° | 55.0° | 86.3° |
| 35 mm | 25 mm | 71.0° | 50.9° | 81.2° |
| 45 mm | 32 mm | 58.0° | 40.6° | 67.4° |
| 55 mm | 40 mm | 48.8° | 33.7° | 57.2° |
| 63 mm | 45 mm | 43.2° | 29.6° | 50.9° |
| 80 mm | 58 mm | 34.7° | 23.5° | 41.1° |
| 90 mm | 65 mm | 31.0° | 21.0° | 36.9° |
| 110 mm | 79 mm | 25.6° | 17.2° | 30.5° |
| 120 mm | 87 mm | 23.5° | 15.8° | 28.1° |
| 150 mm | 108 mm | 18.9° | 12.7° | 22.6° |
| 180 mm | 130 mm | 15.8° | 10.6° | 18.9° |
| 250 mm | 180 mm | 11.4° | 7.6° | 13.7° |
| 350 mm | 252 mm | 8.2° | 5.4° | 9.8° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 41.6 µm (the 0.030 mm full-frame standard scaled by the crop factor).
| Focal | Aperture | 50.0 cm | 1.00 m | 2.00 m | 3.00 m | 5.00 m | 10.0 m | Hyperfocal |
|---|---|---|---|---|---|---|---|---|
| 30 mm | f/1.8 | 3.9 cm | 16.3 cm | 67.4 cm | 1.58 m | 4.99 m | 53.3 m | 12.0 m |
| 30 mm | f/2.8 | 6.1 cm | 25.5 cm | 1.09 m | 2.71 m | 11.0 m | ∞ | 7.75 m |
| 30 mm | f/4 | 8.8 cm | 37.1 cm | 1.68 m | 4.72 m | 59.2 m | ∞ | 5.44 m |
| 30 mm | f/8 | 17.9 cm | 82.4 cm | 6.21 m | ∞ | ∞ | ∞ | 2.73 m |
| 60 mm | f/1.8 | 0.9 cm | 3.9 cm | 16.2 cm | 36.8 cm | 1.04 m | 4.32 m | 48.1 m |
| 60 mm | f/2.8 | 1.4 cm | 6.1 cm | 25.2 cm | 57.6 cm | 1.64 m | 7.18 m | 31.0 m |
| 60 mm | f/4 | 2.0 cm | 8.7 cm | 36.2 cm | 83.1 cm | 2.41 m | 11.7 m | 21.7 m |
| 60 mm | f/8 | 4.1 cm | 17.5 cm | 74.1 cm | 1.76 m | 5.77 m | 118 m | 10.9 m |
| 102 mm | f/1.8 | 0.3 cm | 1.3 cm | 5.5 cm | 12.5 cm | 35.3 cm | 1.43 m | 139 m |
| 102 mm | f/2.8 | 0.4 cm | 2.0 cm | 8.5 cm | 19.5 cm | 55.0 cm | 2.24 m | 89.4 m |
| 102 mm | f/4 | 0.6 cm | 2.9 cm | 12.2 cm | 27.9 cm | 78.8 cm | 3.25 m | 62.6 m |
| 102 mm | f/8 | 1.3 cm | 5.8 cm | 24.4 cm | 56.1 cm | 1.61 m | 7.04 m | 31.4 m |
| 168 mm | f/1.8 | 0.1 cm | 0.4 cm | 1.9 cm | 4.5 cm | 12.8 cm | 52.2 cm | 377 m |
| 168 mm | f/2.8 | 0.1 cm | 0.7 cm | 3.0 cm | 7.0 cm | 20.0 cm | 81.3 cm | 242 m |
| 168 mm | f/4 | 0.2 cm | 1.0 cm | 4.3 cm | 10.0 cm | 28.5 cm | 1.16 m | 170 m |
| 168 mm | f/8 | 0.4 cm | 2.0 cm | 8.6 cm | 20.1 cm | 57.2 cm | 2.35 m | 85.0 m |
Equivalent aperture#
Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.
Night-sky exposure limits#
Longest exposure before stars trail. The NPF rule accounts for pixel pitch and is stricter than the classic 500 rule — use it for pin-sharp stars on high-resolution sensors. (NPF needs a known resolution and is omitted here.)
| Focal length | 500 rule |
|---|---|
| 19 mm (14 mm eq.) | 36.5 s |
| 28 mm (20 mm eq.) | 24.8 s |
| 33 mm (24 mm eq.) | 21.0 s |
| 49 mm (35 mm eq.) | 14.2 s |
| 69 mm (50 mm eq.) | 10.1 s |
Handheld shutter speed guide#
The reciprocal rule uses the equivalent focal length. High-resolution sensors may need one stop faster than this for pixel-sharp results.
| Focal length | No stabilisation (1/equiv. focal) | With 3-stop IS | With 5-stop IBIS |
|---|---|---|---|
| 33 mm | 1/25 s | 0.3 s | 1.3 s |
| 69 mm | 1/50 s | 1/6 s | 0.6 s |
| 139 mm | 1/100 s | 1/13 s | 0.3 s |
| 277 mm | 1/200 s | 1/25 s | 1/6 s |
Similar cameras#
Other Medium format 44 × 33 mm cameras from around the same time.
Frequently asked questions#
What is the crop factor of the Mamiya ZD?
The Mamiya ZD has a crop factor of 0.72× relative to 35 mm full frame (diagonal 60.0 mm vs 43.3 mm).
What size is the Mamiya ZD sensor?
49.9 × 33.3 mm (Medium format 44 × 33 mm), an area of 1662 mm² — 192% of full frame.
Is the Mamiya ZD full frame?
No — its sensor is larger than full frame (medium format).
What lens mount does the Mamiya ZD use?
The Mamiya ZD uses the Mamiya 645 (flange distance 63.30 mm).
How long can I expose the night sky with the Mamiya ZD?
With a 28 mm lens (20 mm equivalent) the 500 rule gives 25 s.
Sources & licences#
- Wikidata Q140476871 — CC0
- Lensfun camera database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources