Yes—but the documented method is to switch to a different preloaded film back between frames, not to change the film gate inside a loaded back. Chroma Camera describes this approach for its Six:12 system, whose removable backs support 6×12, 6×9 and 6×6 formats.
How mid-roll format changes work
A removable film back holds the film and defines the frame format. To change formats, the photographer switches to another back loaded for the desired size, between exposures. Chroma says the Six:12 backs have an integrated darkslide, which protects the film when a back is removed. The maker’s documentation describes a back-swapping system; it does not describe a single loaded back changing its gate after shooting begins. Chroma Camera
For this method, each format needs its corresponding back, and the alternate back must be loaded in advance. Check which backs come with the camera and which are optional accessories: Chroma’s additional-back listing is for a back, not a complete camera system.
Which cameras really change format between frames?
“Multi-format” can mean either changing backs between exposures or choosing a format when loading film and keeping it for the whole roll. Those are different capabilities.
#1 Best Overall
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- 60mm f/8 lens provides a normal field of view for working in a wide variety of situations.
- Zone focusing system allows you to focus as closely as 3' away.
- A 1/100th sec. shutter speed setting is available in addition to a bulb setting for long exposure shooting.
- Standard 1/4"-20 tripod mount allows you to make stable long exposure photographs.
| Camera or system | Documented format choices | When the format is selected | Exposure counts listed |
|---|---|---|---|
| Chroma Six:12 | 6×12, 6×9 and 6×6 | By swapping format-specific, preloaded backs between frames; the maker says the backs have integrated darkslides. | Not stated on the cited product information. Chroma Camera |
| Chroma Six:7 | 6×7, 6×6, 6×3 and 24×68mm | Masks are fitted when loading film and used throughout that roll; the documentation does not establish a mid-roll change. | 6×7: 10; 6×6: 12; 6×3: 24; 24×68mm: 18. These are maker specifications. Chroma Camera |
| Voigtländer Bessa III 667 | 6×7 and 6×6 | The manual listing describes setting the selector after opening the back; the counter and viewfinder bright lines change with the selection. It does not establish switching between frames. | Not stated in the cited manual listing. Manual listing |
| Holga | 6×4.5 and 6×6 | The manual listing describes choosing a frame mask and changing the counter setting with the back plate removed; it does not establish a mid-roll change. | Not stated in the cited manual listing. Manual listing |
What to check before buying
- When switching is possible: Confirm whether formats can be changed between frames or only when a roll is loaded. “Multi-format” alone does not answer this.
- What hardware each format needs: Find out whether each size requires a separate back, a mask, or a selector setting.
- What is included: Check whether extra backs are bundled or sold separately. An accessory back is not a complete camera.
- Film and loading: Confirm that the camera uses 120 medium-format film and follow its specific loading instructions. The format options described here do not require a particular film stock or brand. ILFORD Photo: Film
- Safe removal: Do not assume every camera lets you remove a loaded back safely. The documented Six:12 method relies on removable backs with integrated darkslides.
Why frame size affects the roll
Different frame formats use different amounts of film per exposure, so the number of pictures available on a roll depends on the selected format. For the Six:7, Chroma lists 10 frames at 6×7, 12 at 6×6, 24 at 6×3 and 18 at 24×68mm. Those are product specifications from the maker, not independently tested counts. Chroma Camera
With a system that swaps backs, plan each back as its own loaded unit: choose its format, load the film, and keep track of which back is ready before changing it between frames.
Quick Recap
Rank #4
- Models: Canon sold this camera as New EOS Kiss in Japan, EOS Rebel G in USA/Canada. They are essentially the same camera
- Autofocus Precision: The Rebel G features a reliable autofocus system with a wide-area autofocus point, ensuring accurate and sharp focus on your subjects, whether you’re shooting portraits, landscapes, or action scenes.
- User-Friendly Interface: Designed with simplicity in mind, the Rebel G’s intuitive controls and clear LCD display make it easy to adjust settings and manage your shooting preferences, even if you’re new to film photography.
- Versatile Shooting Modes: Enjoy a range of shooting modes, including full auto, program, aperture priority, and shutter priority. This flexibility allows you to experiment and capture stunning images in various conditions.
- Built-In Flash: The integrated flash provides reliable illumination for low-light environments and fill flash for bright conditions, ensuring well-exposed photos in diverse lighting situations.
Rank #3
- INCLUDES: Holga 120N White Camera + Ilford HP5 Film + MicroFiber Cloth
- Classic Toy Camera - 60mm f/8 Plastic Lens
- Zone Focusing System - Shutter Speeds: 1/100 sec. and Bulb
- Aperture Settings: f/8 or f/11 - Hot Shoe and Tripod Mount
- Uses 120 Roll Film - Includes 6 x 4.5cm and 6 x 6cm Masks
Rank #2
- Classic Toy Camera
- 60mm f/8 Plastic Lens
- Zone Focusing System
- Shutter Speeds: 1/100 sec. and Bulb
- Includes: Ilford HP5 Plus Black and White Negative Film (120 Roll Film)
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