Olympus PEN E-PM2 Specs, Sensor Size & Crop Factor

Q: What is the crop factor of the Olympus PEN E-PM2?

The Olympus PEN E-PM2 has a crop factor of 2.00× relative to 35 mm full frame (diagonal 21.6 mm vs 43.3 mm).

2.00×

Crop factor

17.3×13.0 mm

Sensor size

225 mm²

Area · 26% of full frame

16 MP

Resolution

3.75 µm

Pixel pitch

f/5.6

Diffraction-limited aperture

Specifications#

Brand: Olympus
Model: PEN E-PM2
Camera type: Large-sensor compact
Sensor size: 17.3 × 13.0 mm (Four Thirds / Micro Four Thirds)
Crop factor: 2.00×
Resolution: 16 MP (4,608 × 3,456 px)
Fastest shutter: 1/4,000 s
Continuous shooting: 8 fps
Weight: 269 g (9.5 oz)
Sensor type: CMOS
AF points / area: 35 focus points
Dimensions: 110 x 64 x 34mm (4.33 x 2.52 x 1.34 inches)
Drive: 8 frames per second

Specifications merged from Wikipedia, Wikidata and openMVG. Spot an error? Tell us.

Sensor size compared#

The Olympus PEN E-PM2 sensor (highlighted) drawn to scale against common formats. Its area is 26% of a full-frame sensor, which collects about 1.9 stops less total light at the same exposure.

Focal length equivalents & field of view#

Multiply any focal length by 2.00 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
8 mm	16 mm	94.5°	78.2°	107.0°
10 mm	20 mm	81.7°	66.0°	94.5°
12 mm	24 mm	71.6°	56.9°	84.1°
14 mm	28 mm	63.4°	49.8°	75.4°
16 mm	32 mm	56.8°	44.2°	68.1°
18 mm	36 mm	51.3°	39.7°	62.0°
20 mm	40 mm	46.8°	36.0°	56.8°
24 mm	48 mm	39.6°	30.3°	48.5°
28 mm	56 mm	34.3°	26.1°	42.3°
35 mm	70 mm	27.8°	21.0°	34.4°
40 mm	80 mm	24.4°	18.5°	30.3°
50 mm	100 mm	19.6°	14.8°	24.4°
56 mm	112 mm	17.6°	13.2°	21.9°
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°	12.4°
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°
400 mm	800 mm	2.5°	1.9°	3.1°
600 mm	1200 mm	1.7°	1.2°	2.1°

Depth of field table#

Total depth of field at each subject distance, using a circle of confusion of 15.0 µm (the 0.030 mm full-frame standard scaled by the crop factor). Detailed tables: 24 mm f/1.8, 24 mm f/2.8, 35 mm f/1.8, 35 mm f/2.8, 50 mm f/1.8, 50 mm f/2.8.

Focal	Aperture	50.0 cm	1.00 m	2.00 m	3.00 m	5.00 m	10.0 m	Hyperfocal
11 mm	f/1.8	11.0 cm	46.4 cm	2.21 m	7.21 m	∞	∞	4.49 m
11 mm	f/2.8	17.5 cm	77.9 cm	5.28 m	∞	∞	∞	2.89 m
11 mm	f/4	25.8 cm	1.29 m	148 m	∞	∞	∞	2.03 m
11 mm	f/8	63.4 cm	52.5 m	∞	∞	∞	∞	1.02 m
22 mm	f/1.8	2.7 cm	10.9 cm	44.7 cm	1.03 m	3.01 m	16.1 m	17.9 m
22 mm	f/2.8	4.2 cm	17.1 cm	70.8 cm	1.66 m	5.31 m	69.3 m	11.5 m
22 mm	f/4	5.9 cm	24.6 cm	1.04 m	2.57 m	9.97 m	∞	8.09 m
22 mm	f/8	12.0 cm	51.5 cm	2.58 m	9.75 m	∞	∞	4.05 m
37 mm	f/1.8	0.9 cm	3.8 cm	15.5 cm	35.2 cm	98.9 cm	4.09 m	50.7 m
37 mm	f/2.8	1.4 cm	5.9 cm	24.2 cm	55.0 cm	1.56 m	6.75 m	32.6 m
37 mm	f/4	2.0 cm	8.5 cm	34.7 cm	79.3 cm	2.28 m	10.8 m	22.8 m
37 mm	f/8	4.1 cm	17.0 cm	71.0 cm	1.67 m	5.37 m	73.8 m	11.4 m
62 mm	f/1.8	0.3 cm	1.3 cm	5.4 cm	12.4 cm	34.7 cm	1.40 m	142 m
62 mm	f/2.8	0.5 cm	2.1 cm	8.5 cm	19.3 cm	54.1 cm	2.20 m	91.6 m
62 mm	f/4	0.7 cm	2.9 cm	12.1 cm	27.6 cm	77.6 cm	3.18 m	64.1 m
62 mm	f/8	1.4 cm	5.9 cm	24.3 cm	55.5 cm	1.58 m	6.87 m	32.1 m

Equivalent aperture#

Exposure is identical at the same f-number on any format; equivalence only describes depth of field and total light.

Aperture on this camera	Full-frame equivalent (depth of field)	Hyperfocal at 22 mm
f/1.2	f/2.4	26.9 m
f/1.4	f/2.8	23.1 m
f/1.8	f/3.6	17.9 m
f/2	f/4.0	16.2 m
f/2.8	f/5.6	11.5 m
f/4	f/8.0	8.09 m
f/5.6	f/11.2	5.78 m
f/8	f/16.0	4.05 m

Diffraction & pixel pitch#

With 3.75 µm pixels, diffraction starts to soften pixel-level detail around f/5.6. For maximum sharpness keep landscapes between f/3.1 and f/6; stopping down further trades detail for depth of field.

Aperture	Airy disk diameter	Spread over	At 100% view
f/2.8	3.8 µm	1.0 px	sharp
f/4	5.4 µm	1.4 px	sharp
f/5.6	7.5 µm	2.0 px	slight softening
f/8	10.7 µm	2.9 px	slight softening
f/11	14.8 µm	3.9 px	visibly soft
f/16	21.5 µm	5.7 px	visibly soft
f/22	29.5 µm	7.9 px	visibly soft

Maximum print sizes#

At 16 MP the Olympus PEN E-PM2 produces 4,608 × 3,456 pixel images. See the 16 megapixel guide or the print size calculator.

Resolution	Typical use	Inches	Centimetres
300 DPI	Photo-lab quality	15.4 × 11.5 in	39 × 29 cm
240 DPI	Fine-art inkjet	19.2 × 14.4 in	49 × 37 cm
200 DPI	Wall print	23.0 × 17.3 in	59 × 44 cm
150 DPI	Poster, viewed from 1 m+	30.7 × 23.0 in	78 × 59 cm

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.

Focal length	500 rule	NPF f/1.8	NPF f/2.8	NPF f/4
7 mm (14 mm eq.)	35.7 s	25.1 s	30.1 s	36.1 s
10 mm (20 mm eq.)	25.0 s	17.6 s	21.1 s	25.3 s
12 mm (24 mm eq.)	20.8 s	14.6 s	17.6 s	21.1 s
18 mm (36 mm eq.)	13.9 s	9.8 s	11.7 s	14.0 s
25 mm (50 mm eq.)	10.0 s	7.0 s	8.4 s	10.1 s

Open the NPF / 500 rule calculator →

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
12 mm	1/25 s	0.3 s	1.3 s
25 mm	1/50 s	1/6 s	0.6 s
50 mm	1/100 s	1/13 s	0.3 s
100 mm	1/200 s	1/25 s	1/6 s

Lens#

The Olympus PEN E-PM2 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 × 2.00.

Similar cameras#

Other Four Thirds / Micro Four Thirds cameras from around the same time.

Frequently asked questions#

What is the crop factor of the Olympus PEN E-PM2?

The Olympus PEN E-PM2 has a crop factor of 2.00× relative to 35 mm full frame (diagonal 21.6 mm vs 43.3 mm).

What size is the Olympus PEN E-PM2 sensor?

17.3 × 13.0 mm (Four Thirds / Micro Four Thirds), an area of 225 mm² — 26% of full frame.

Is the Olympus PEN E-PM2 full frame?

No — its sensor is Four Thirds / Micro Four Thirds, which is 3.8× smaller in area than full frame.

How many megapixels does the Olympus PEN E-PM2 have?

16 megapixels (4,608 × 3,456 pixels), enough for a 15 × 12 inch print at 300 DPI.

How long can I expose the night sky with the Olympus PEN E-PM2?

With a 10 mm lens (20 mm equivalent) the 500 rule gives 25 s and the stricter NPF rule at f/2.8 gives 21 s.

Sources & licences#

Wikipedia: Olympus PEN E-PM2 — CC BY-SA 4.0
Wikidata Q16184324 — CC0
openMVG sensor width database — MPL-2.0

Last updated October 03, 2026 · How we calculate · Sources