Here is a chart showing the difference between the Pentax 6x7, 67, and 67II medium-format cameras.
| | 6x7 | 67 | 67II |
| Year introduced | 1969 | 1989 | 1998 |
| Mount | Pentax 6x7 dual bayonet | Pentax 6x7 dual bayonet | Pentax 6x7 dual bayonet |
| Meter range | 2.5 - 19 EV (TTL pentaprism viewfinder) | 2.5 - 19 EV (TTL pentaprism viewfinder) | 2 - 21 EV (AE pentaprism viewfinder) |
| Meter pattern | Average | Average | m (6 segment) c s |
| ISO range | 12 - 3200 | 12 - 3200 | 6 - 6400 |
| Film type | 120 and 220 roll film | 120 and 220 roll film | 120 and 220 roll film |
| No. of exposures | 120 film: 10, 220 film: 21 | 120 film: 10, 220 film: 21 | 120 film: 10, 220 film: 21 |
| Data imprint on film | No | No | No |
| Exposure modes | M, B, X, T | M, B, X, T | Av, M, B, X, T |
| Exposure compensation | Not applicable | Not applicable | +/- 3 EV |
| Exposure memory lock | Not applicable | Not applicable | Yes |
| Shutter speeds (auto) | Not applicable | Not applicable | 30 - 1/1000s |
| Shutter speeds (manual) | 1 - 1/1000s | 1 - 1/1000s | 4 - 1/1000s |
| Shutter speeds (mechanical) | None | None | None |
| Half step speeds in M and Tv | No | No | No |
| Self timer | No | No | Yes |
| Mirror lock-up | Yes, except for the first year of production | Yes | Yes |
| Auto bracketing | Not applicable | Not applicable | No |
| Multiple exposures | No | No | Yes |
| Winder | No | No | No |
| Built-in flash | No | No | No |
| TTL flash | No | No | Yes |
| P-TTL flash | No | No | No |
| Sync speed | 1/30s | 1/30s | 1/30s |
| Flash exposure comp | Not applicable | Not applicable | No |
| Autofocus | No | No | No |
| Autofocus sensitivity | Not applicable | Not applicable | Not applicable |
| Viewfinder | Exchangeable. Pentaprism 90% coverage, waist level 100% coverage | Exchangeable. Pentaprism 90% coverage, waist level 100% coverage | Exchangeable. Pentaprism 0.75x magnification and 90% coverage, waist level 100% coverage |
| Viewfinder type | Pentaprism, TTL pentaprism with light meter, folding waist level, rigid waist level magnifying hood | Pentaprism, TTL pentaprism with light meter, folding waist level, rigid waist level magnifying hood | Pentaprism, AE pentaprism with light meter and Av autoexposure, folding waist level, rigid waist level magnifying hood |
| Diopter correction | No | No | -2.5 - +1.5 |
| Exchangeable screen | Yes (at service center) | Yes (at service center) | Yes |
| Depth of field preview | Yes (on lens) | Yes (on lens) | Yes (on lens) |
| Image size | 55 x 70 mm | 55 x 70 mm | 55 x 70 mm |
| Battery | 6V alkaline or silver oxide battery | 6V alkaline or silver oxide battery | 2c CR123A |
| External battery pack | Yes, for use in cold temperatures | Yes, for use in cold temperatures | No |
| Size (W x H x D) | 184 x 149 x 91 mm (with pentaprism, without lens) | 177 x 150 x 91 mm (with TTL prism, without lens) | 185.5 x 151 x 106 mm (with AE prism, wothout lens) |
| Weight | 1290 g, 1750 g with pentaprism finder | 1290 g, 1810 g with TTL pentaprisom | 1660 g with AE pentaprism finder |
| Comment | Accepts leaf shutter lens for flash synchronization to 1/500s.
The TTL pentaprism with lightmeter couples to the shutter speed and aperture and provides for manual 'match needle' exposure setting | Accepts leaf shutter lens for flash synchronization to 1/500s.
The TTL pentaprism with lightmeter couples to the shutter speed and aperture and provides for manual 'match needle' exposure setting | Accepts leaf shutter lens for flash synchronization to 1/500s.
The AE pentaprism with lightmeter couples to the shutter speed and aperture and provides for Av autoexposure and manual 'match needle' exposure |
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