Medium Format Support
中画幅支持
Full 120 film format support with multiple aspect ratios
Medium format film photography delivers image quality that 35mm simply cannot match – larger negatives capture more detail, smoother tonal gradations, and a distinctive rendering of depth that has made cameras like the Hasselblad 500C, Mamiya RB67, Pentax 67, and Fuji GW690 legendary among professional photographers. FilmMeter provides complete 120 film support with format-specific calculations that account for the unique characteristics of medium format shooting.
Supported 120 Formats
FilmMeter supports all common 120 medium format configurations, each with accurate frame counting and aspect ratio overlays:
| Format | Frame Size | Frames per Roll | Common Cameras |
|---|---|---|---|
| 6x4.5 | 56 x 42mm | 15-16 frames | Mamiya 645, Bronica ETRSi, Pentax 645 |
| 6x6 | 56 x 56mm | 12 frames | Hasselblad 500C/M, Rolleiflex, Yashica Mat |
| 6x7 | 56 x 70mm | 10 frames | Mamiya RB67/RZ67, Pentax 67 |
| 6x9 | 56 x 84mm | 8 frames | Fuji GW690, Voigtlander Bessa III |
When you create a new film roll in the film roll management system and select 120 format, FilmMeter automatically sets the correct frame count for your chosen sub-format. The mechanical frame counter tracks your remaining exposures with precision.
Aspect Ratio Overlay on Viewfinder
FilmMeter displays format-specific aspect ratio overlays on the camera viewfinder, letting you previsualize your composition in the exact proportions of your medium format frame. The square 6x6 format favored by Hasselblad and Rolleiflex users produces a 1:1 ratio that demands a different compositional approach than the panoramic 6x9 format. Seeing the correct crop in real time helps you compose more deliberately – especially important when each frame on a roll of 120 film represents a significant investment.
Depth of Field for Medium Format
One of the most significant differences between medium format and 35mm photography is depth of field behavior. At the same angle of view and f-stop, medium format produces noticeably shallower depth of field because achieving the same framing requires a longer focal length. An 80mm lens on 6x6 (equivalent to ~50mm on 35mm) at f/2.8 will render backgrounds more softly than a 50mm f/2.8 on a 35mm camera.
FilmMeter’s depth of field calculator automatically uses the correct circle of confusion for your selected medium format, ensuring that near limit, far limit, and hyperfocal distance calculations are accurate for your specific camera system. Combined with the LiDAR rangefinder for precise distance measurement, you can confidently work with the thin depth of field that makes medium format portraits so captivating.
Metering for Medium Format
The precision light meter works identically for medium format and 35mm – exposure is independent of format size. However, FilmMeter’s AI scene detection and reciprocity compensation apply equally to medium format shooting, and all exposure data is recorded per-frame in your film roll with the correct format metadata. Browse the film stocks database for 120-compatible films with reciprocity data and color previews.