The short answer is no, you cannot reliably or safely use 120 film in a Hasselblad 220 film back. Attempting to do so can lead to mechanical issues within the back, film jams, inaccurate frame spacing, and damage to both the film and the camera. This comprehensive guide explains why, along with crucial information for Hasselblad photographers.
Understanding 120 and 220 Film Formats
To understand the limitations, it’s essential to appreciate the fundamental differences between 120 and 220 film. Both are medium format films, but their construction and intended use differ significantly.
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120 Film: This is the more common medium format film. It features a backing paper that runs the entire length of the film, protecting it from light exposure before and after use. This backing paper also contains frame numbers. It typically yields 12 exposures in a 6×6 format with a Hasselblad.
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220 Film: Designed for professional photographers who needed to shoot more frames between reloads, 220 film lacks the backing paper for the majority of its length. It only has a short strip of backing paper at the beginning and end of the roll. This allows for approximately twice the number of exposures (typically 24 in 6×6 format) on a roll of the same physical size.
Why 120 Film Won’t Work in a 220 Back
The Hasselblad 220 back is specifically designed to accommodate the thinner profile of 220 film. Several critical factors contribute to the incompatibility:
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Pressure Plate Position: The pressure plate in a 220 back is positioned differently compared to a 120 back. It’s designed to press directly against the film emulsion, relying on the film’s inherent thickness. Using 120 film, with its significantly thicker profile due to the backing paper, will result in incorrect film plane positioning. This leads to unsharp images and potential damage as the film is pressed too tightly.
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Film Counter Mechanism: The 220 back relies on the film’s lack of backing paper to accurately measure film advance. Introducing 120 film, with its continuous backing paper, will disrupt the counting mechanism, potentially causing overlaps, gaps between frames, or a complete failure of the winding system.
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Potential for Damage: Forcing a 120 film roll into a 220 back can put undue stress on the back’s internal components. This could lead to bent parts, misalignment, and ultimately, a malfunctioning film back. Repairing these backs can be costly.
What Happens If You Try Anyway?
While some photographers might be tempted to “try it anyway,” the risks far outweigh any potential benefits. Common outcomes include:
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Blurred Images: Due to the incorrect film plane positioning, your images are likely to be out of focus, even if the lens is correctly calibrated.
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Uneven Spacing: Expect inconsistent spacing between frames, potentially leading to overlaps or large gaps that cut off portions of your images.
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Film Jams: The film might get stuck within the back, requiring careful (and potentially destructive) extraction.
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Damaged Back: As mentioned earlier, the added stress can damage the internal components, rendering the back unusable.
Frequently Asked Questions (FAQs)
Here are some frequently asked questions to further clarify the issue:
FAQ 1: Can I modify a 220 back to use 120 film?
No, modifying a 220 back for 120 film is generally not recommended. While some DIY solutions might exist, they are unlikely to be reliable and could further damage the back. It’s best to invest in a dedicated 120 back.
FAQ 2: How can I identify if my Hasselblad back is for 120 or 220 film?
Hasselblad 120 backs are typically labeled “120” or have markings indicating the number of exposures (e.g., “12 Exp”). 220 backs will be marked “220” or indicate a higher number of exposures (e.g., “24 Exp”). The type number printed on the back will also usually indicate the film format (e.g., A12 for 120).
FAQ 3: Are there any Hasselblad backs that can use both 120 and 220 film?
No, there are no Hasselblad backs that are designed to natively accept both 120 and 220 film without modification or risk. Always use the appropriate back for the film format.
FAQ 4: Where can I find Hasselblad 120 film backs?
Hasselblad 120 film backs are available from various sources, including used camera equipment stores, online marketplaces like eBay, and specialized camera repair shops. Ensure the back is in good working order before purchasing.
FAQ 5: What are the different types of Hasselblad 120 film backs?
Hasselblad produced several 120 film backs, including the A12, A12V (with a dark slide holder), and A12MkII. These are broadly compatible across the 500 series cameras.
FAQ 6: What if I can’t find any 220 film?
220 film is becoming increasingly difficult to find, as its production has largely been discontinued. Fortunately, readily available 120 film provides a viable alternative.
FAQ 7: Can I use an adapter to make 120 film work in a 220 back?
While some individuals have experimented with homemade adapters or shims, these are not recommended due to the potential for damage and unreliability.
FAQ 8: Is it possible to convert a 220 back to a 120 back?
Converting a 220 back to a 120 back is not a simple or practical process. It would involve significant modifications and may not be cost-effective compared to purchasing a dedicated 120 back.
FAQ 9: What should I do if my 220 back is damaged?
If your 220 back is damaged, it’s best to consult with a reputable Hasselblad repair technician. They can assess the damage and provide a quote for repairs.
FAQ 10: Will using the wrong film affect my Hasselblad lens?
No, using the wrong film back will not directly affect your Hasselblad lens. The issue is primarily with the film plane position and film advance mechanism within the back itself.
FAQ 11: How do I load 120 film into a Hasselblad 120 back correctly?
Loading 120 film correctly involves aligning the start arrow on the film with the corresponding mark on the film spool. Consult your camera manual for detailed instructions.
FAQ 12: Where can I find more information about Hasselblad film backs?
Numerous online resources, including forums, websites dedicated to Hasselblad cameras, and repair manuals, offer detailed information about Hasselblad film backs.
Conclusion
In summary, while the allure of making a 220 back work with 120 film might be tempting, it is a path fraught with potential problems. The risks of damage, film jams, and poor image quality far outweigh any perceived convenience. Invest in a dedicated 120 back to ensure the optimal performance and longevity of your Hasselblad camera system. The peace of mind and superior results you’ll experience are well worth the investment. Remember, preserving your equipment and consistently achieving high-quality images should always be your top priority.