Specifications#
- Brand
- Minolta
- Model
- DiMage A1
- Camera type
- Compact
- Sensor size
- 8.8 × 6.6 mm (2/3" sensor)
- Crop factor
- 3.93×
Specifications merged from Wikidata, Lensfun and openMVG. Spot an error? Tell us.
Sensor size compared#
Focal length equivalents & field of view#
Multiply any focal length by 3.93 to get the full-frame field of view. For fixed-lens cameras use the real focal length printed on the lens (e.g. “6.1–18.3 mm”), not the 35 mm equivalent.
| Lens on this camera | Full-frame equivalent | Horizontal | Vertical | Diagonal |
|---|---|---|---|---|
| 4 mm | 16 mm | 95.5° | 79.0° | 107.9° |
| 4.5 mm | 18 mm | 88.7° | 72.5° | 101.4° |
| 5 mm | 20 mm | 82.7° | 66.8° | 95.5° |
| 6 mm | 24 mm | 72.5° | 57.6° | 85.0° |
| 8 mm | 31 mm | 57.6° | 44.8° | 69.0° |
| 10 mm | 39 mm | 47.5° | 36.5° | 57.6° |
| 12 mm | 47 mm | 40.3° | 30.8° | 49.2° |
| 15 mm | 59 mm | 32.7° | 24.8° | 40.3° |
| 20 mm | 79 mm | 24.8° | 18.7° | 30.8° |
| 25 mm | 98 mm | 20.0° | 15.0° | 24.8° |
| 30 mm | 118 mm | 16.7° | 12.6° | 20.8° |
| 40 mm | 157 mm | 12.6° | 9.4° | 15.7° |
| 50 mm | 197 mm | 10.1° | 7.6° | 12.6° |
| 70 mm | 275 mm | 7.2° | 5.4° | 9.0° |
| 100 mm | 393 mm | 5.0° | 3.8° | 6.3° |
| 150 mm | 590 mm | 3.4° | 2.5° | 4.2° |
Depth of field table#
Total depth of field at each subject distance, using a circle of confusion of 7.6 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 |
|---|---|---|---|---|---|---|---|---|
| 6 mm | f/2 | 21.9 cm | 1.02 m | 11.8 m | ∞ | ∞ | ∞ | 2.37 m |
| 6 mm | f/2.8 | 32.1 cm | 1.81 m | ∞ | ∞ | ∞ | ∞ | 1.69 m |
| 6 mm | f/4 | 50.8 cm | 5.80 m | ∞ | ∞ | ∞ | ∞ | 1.19 m |
| 6 mm | f/8 | 2.80 m | ∞ | ∞ | ∞ | ∞ | ∞ | 59.6 cm |
| 11 mm | f/2 | 6.2 cm | 25.3 cm | 1.07 m | 2.64 m | 10.4 m | ∞ | 7.94 m |
| 11 mm | f/2.8 | 8.7 cm | 36.0 cm | 1.60 m | 4.39 m | 39.2 m | ∞ | 5.68 m |
| 11 mm | f/4 | 12.5 cm | 53.2 cm | 2.68 m | 10.5 m | ∞ | ∞ | 3.98 m |
| 11 mm | f/8 | 26.3 cm | 1.33 m | ∞ | ∞ | ∞ | ∞ | 1.99 m |
| 19 mm | f/2 | 2.0 cm | 8.3 cm | 33.7 cm | 76.8 cm | 2.20 m | 10.3 m | 23.7 m |
| 19 mm | f/2.8 | 2.8 cm | 11.6 cm | 47.5 cm | 1.09 m | 3.23 m | 18.1 m | 16.9 m |
| 19 mm | f/4 | 4.1 cm | 16.7 cm | 68.9 cm | 1.61 m | 5.12 m | 58.5 m | 11.9 m |
| 19 mm | f/8 | 8.2 cm | 34.1 cm | 1.51 m | 4.05 m | 28.9 m | ∞ | 5.94 m |
| 31 mm | f/2 | 0.7 cm | 3.1 cm | 12.5 cm | 28.3 cm | 79.4 cm | 3.25 m | 63.0 m |
| 31 mm | f/2.8 | 1.0 cm | 4.3 cm | 17.5 cm | 39.8 cm | 1.12 m | 4.66 m | 45.0 m |
| 31 mm | f/4 | 1.5 cm | 6.2 cm | 25.1 cm | 57.1 cm | 1.62 m | 7.03 m | 31.5 m |
| 31 mm | f/8 | 3.0 cm | 12.4 cm | 50.8 cm | 1.17 m | 3.50 m | 21.1 m | 15.8 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 |
|---|---|
| 4 mm (16 mm eq.) | 31.8 s |
| 5 mm (20 mm eq.) | 25.4 s |
| 6 mm (24 mm eq.) | 21.2 s |
| 9 mm (35 mm eq.) | 14.1 s |
| 13 mm (51 mm eq.) | 9.8 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 |
|---|---|---|---|
| 6 mm | 1/25 s | 0.3 s | 1.3 s |
| 13 mm | 1/50 s | 1/6 s | 0.6 s |
| 25 mm | 1/100 s | 1/13 s | 0.3 s |
| 51 mm | 1/200 s | 1/25 s | 1/6 s |
Lens#
The Minolta DiMage A1 has a built-in, non-interchangeable lens. Use the real focal length of that lens with the tables above; its full-frame equivalent is that number × 3.93.
Similar cameras#
Other 2/3" cameras from around the same time.
Frequently asked questions#
What is the crop factor of the Minolta DiMage A1?
The Minolta DiMage A1 has a crop factor of 3.93× relative to 35 mm full frame (diagonal 11.0 mm vs 43.3 mm).
What size is the Minolta DiMage A1 sensor?
8.8 × 6.6 mm (2/3"), an area of 58 mm² — 7% of full frame.
Is the Minolta DiMage A1 full frame?
No — its sensor is 2/3", which is 14.9× smaller in area than full frame.
How long can I expose the night sky with the Minolta DiMage A1?
With a 5 mm lens (20 mm equivalent) the 500 rule gives 25 s.
Sources & licences#
- Wikipedia: Minolta Dimage A1 — CC BY-SA 4.0
- Wikidata Q6869016 — CC0
- Lensfun camera database — CC BY-SA 3.0
- openMVG sensor width database — MPL-2.0
Last updated October 03, 2026 · How we calculate · Sources