OM System OM-1: what each focal length frames
The OM System OM-1 has a 2x crop factor (Micro Four Thirds sensor), so a lens frames like its focal length times 2x on full frame. A 50 mm lens on the OM System OM-1 frames like 100 mm on full frame.
Lens mount: Micro Four Thirds.
Compare focal lengths on the OM System OM-1 over a photo
How the frames nest on the OM System OM-1
Focal length table for the OM System OM-1
| Focal length | Full-frame equivalent | Horizontal angle | Vertical angle | Diagonal angle |
|---|---|---|---|---|
| 14 mm | 28 mm | 63.4° | 49.7° | 75.4° |
| 16 mm | 32 mm | 56.8° | 44.2° | 68.1° |
| 18 mm | 36 mm | 51.4° | 39.7° | 62.0° |
| 20 mm | 40 mm | 46.8° | 36.0° | 56.8° |
| 24 mm | 48 mm | 39.7° | 30.3° | 48.5° |
| 28 mm | 56 mm | 34.3° | 26.1° | 42.2° |
| 35 mm | 70 mm | 27.8° | 21.0° | 34.3° |
| 40 mm | 80 mm | 24.4° | 18.4° | 30.3° |
| 50 mm | 100 mm | 19.6° | 14.8° | 24.4° |
| 70 mm | 140 mm | 14.1° | 10.6° | 17.6° |
| 85 mm | 170 mm | 11.6° | 8.7° | 14.5° |
| 100 mm | 200 mm | 9.9° | 7.4° | 12.3° |
| 135 mm | 270 mm | 7.3° | 5.5° | 9.2° |
| 200 mm | 400 mm | 5.0° | 3.7° | 6.2° |
| 300 mm | 600 mm | 3.3° | 2.5° | 4.1° |
Classic full-frame looks on the OM System OM-1
To get the framing a full-frame shooter means by these focal lengths, use these on the OM System OM-1:
- To frame like 24 mm on full frame, use 12 mm on the OM System OM-1.
- To frame like 35 mm on full frame, use 18 mm on the OM System OM-1.
- To frame like 50 mm on full frame, use 25 mm on the OM System OM-1.
- To frame like 85 mm on full frame, use 42 mm on the OM System OM-1.
- To frame like 135 mm on full frame, use 68 mm on the OM System OM-1.
What each lens covers at a distance on the OM System OM-1
Width x height of the scene each focal length captures on the OM System OM-1, held horizontally. Close up, real lenses frame a little tighter than this.
| Focal length | At 1 m | At 2 m | At 3 m | At 5 m | At 10 m |
|---|---|---|---|---|---|
| 24 mm | 0.7 × 0.5 m | 1.4 × 1.1 m | 2.2 × 1.6 m | 3.6 × 2.7 m | 7.2 × 5.4 m |
| 35 mm | 0.5 × 0.4 m | 1.0 × 0.7 m | 1.5 × 1.1 m | 2.5 × 1.9 m | 4.9 × 3.7 m |
| 50 mm | 0.3 × 0.3 m | 0.7 × 0.5 m | 1.0 × 0.8 m | 1.7 × 1.3 m | 3.5 × 2.6 m |
| 85 mm | 0.2 × 0.2 m | 0.4 × 0.3 m | 0.6 × 0.5 m | 1.0 × 0.8 m | 2.0 × 1.5 m |
| 135 mm | 0.1 × 0.1 m | 0.3 × 0.2 m | 0.4 × 0.3 m | 0.6 × 0.5 m | 1.3 × 1.0 m |
Portrait distances on the OM System OM-1
How far to stand from the subject with the OM System OM-1 held vertically, so the subject fills 90% of the frame height. Full body means a 1.8 m person, head and shoulders about 0.5 m.
- With 35 mm on the OM System OM-1: about 4.0 m (13 ft) for a full-body portrait, 1.1 m (3.7 ft) for head and shoulders.
- With 50 mm on the OM System OM-1: about 5.8 m (19 ft) for a full-body portrait, 1.6 m (5.3 ft) for head and shoulders.
- With 85 mm on the OM System OM-1: about 9.8 m (32 ft) for a full-body portrait, 2.7 m (9.0 ft) for head and shoulders.
- With 135 mm on the OM System OM-1: about 15.6 m (51 ft) for a full-body portrait, 4.3 m (14 ft) for head and shoulders.
Questions
What does a 50 mm lens look like on the OM System OM-1?
It frames like 100 mm on full frame, with a horizontal angle of view of 19.6°.
Which lens gives a 50 mm full-frame look on the OM System OM-1?
A lens of about 25 mm. It frames like 50 mm on full frame.
How far do I stand for a full-body portrait with an 85 mm lens on the OM System OM-1?
About 9.8 m (32 ft) from the subject, with the camera held vertically. That fits a 1.8 m person in 90% of the frame height. For head and shoulders, stand about 2.7 m (9.0 ft) away.
How much does a 35 mm lens cover at 3 m on the OM System OM-1?
About 1.5 × 1.1 m, width by height, with the camera held horizontally. At 10 m it covers about 4.9 × 3.7 m.
Can I see these focal lengths on the OM System OM-1 before buying a lens?
Yes. Prospekt for iPhone has the OM System OM-1 built in. Pick it, choose a focal length and point your phone to see the framing live.
Other cameras with the same sensor size
Panasonic GH7, Panasonic GH6, Panasonic G9 II, OM System OM-1 II, OM System OM-5