Focal lengths / Medium format

250mm on Medium format

Frames like 197.5mm on full frame: 10° across, 7.5° top to bottom.

Reference photo: Forest

The scene as framed by 250mm Medium format — A What 250mm Medium format sees Long focal length: the crop is enlarged and looks soft. The framing is still exact.

	A 250mm on Medium format
Focal length	250mm
Full-frame equivalent	197.5mm
Horizontal	10°
Vertical	7.5°
Diagonal	12.5°
Sensor	Medium format 43.8 × 32.9 mm
Crop factor	×0.8
Aspect ratio	4:3

Compare it with another setup →

Same framing on other formats

The focal length that matches 197.5mm full-frame equivalent on each sensor size (crop-factor convention, diagonal).

Sensor	Focal length	Closest page
Full frame	197.5mm	200mm on Full frame
APS-C	131.7mm	—
APS-C (Canon)	123.4mm	—
Micro Four Thirds	98.8mm	90mm on Micro Four Thirds
1-inch	73.1mm	—

Primes at 250mm for Medium format (1)

Lens	Focal	Aperture	Mount	Year
Fujifilm GF 250mm f/4 R LM OIS WR	250mm	f/4	Fujifilm G	2018