Yes, you can use SX-70 film in a 600 camera, but you must employ a neutral density (ND) filter to compensate for the film’s lower ISO. Without it, your photos will be severely overexposed, resulting in washed-out, unusable images.
Understanding the Disparity: Film Speed and Camera Functionality
The core issue boils down to film speed (ISO). SX-70 film has a much lower ISO (around 160) compared to 600 film (ISO 640). Polaroid 600 cameras are designed to expose film with an ISO of 640. Consequently, they allow significantly more light to reach the film during each exposure. Therefore, using SX-70 film directly in a 600 camera results in overexposure because the film is receiving far too much light.
The ND filter acts as a light attenuator, reducing the amount of light entering the camera lens and striking the film. This effectively lowers the film’s apparent ISO as perceived by the camera, allowing for proper exposure. It’s the difference between bright sunshine and a cloudy day – the filter dims the “sunshine” enough to allow the SX-70 film to capture an image correctly.
The ND Filter: Your Key to Success
The ND filter comes in the form of a clear plastic shield that is placed directly in front of the SX-70 film pack as it’s loaded into the 600 camera. The filter effectively reduces the light reaching the film by roughly two stops. This is crucial for obtaining properly exposed images with SX-70 film in a 600 camera. You can find these filters sold specifically for this purpose online or at specialty camera stores. They are inexpensive and reusable.
Importance of Quality
While any ND filter will technically reduce the light, it’s worth investing in a filter specifically designed for this purpose. Cheap filters can sometimes introduce color casts or distort the image quality. Look for filters that are optically clear and claim to be color-neutral.
Practical Considerations
Beyond the filter, there are a few other things to keep in mind when using SX-70 film in a 600 camera:
- Lighting Conditions: Even with the ND filter, SX-70 film performs best in well-lit environments. Avoid shooting in dim conditions or indoors without supplemental lighting.
- Experimentation is Key: Polaroid photography is inherently unpredictable. Don’t be afraid to experiment with different lighting conditions and subject matter to see what works best. Keep notes on your exposures so you can learn from your results.
- Film Age: Polaroid film has a shelf life. Expired film may produce unpredictable results, even with the ND filter. Always check the expiration date on the film pack before using it. Older film might require a slight adjustment to exposure settings even with the ND filter.
Common Mistakes to Avoid
- Forgetting the ND Filter: This is the most common mistake. Always use the ND filter when using SX-70 film in a 600 camera.
- Using the Wrong Type of Filter: Standard camera lens filters designed to screw onto a lens will not work. You need the flat, clear plastic shield that sits in front of the film pack.
- Shooting in Low Light Without Adjustments: Even with the filter, SX-70 film struggles in low light. Consider using a flash or supplemental lighting.
Frequently Asked Questions (FAQs)
Can I damage my 600 camera by using SX-70 film?
No, using SX-70 film with an ND filter will not damage your camera. The filter ensures the proper amount of light reaches the film, preventing any stress on the camera’s internal mechanisms. The camera doesn’t know the difference between film types; it just meters and exposes the available light.
Where can I buy ND filters for using SX-70 film in a 600 camera?
ND filters specifically designed for this purpose are widely available online through retailers like Amazon and eBay. You can also find them at specialty camera stores that sell Polaroid film and accessories. Search for “SX-70 film ND filter” or “Polaroid 600 to SX-70 filter.”
Will the ND filter affect the color or sharpness of my photos?
A high-quality ND filter should have a minimal impact on color or sharpness. However, cheaper filters may introduce a slight color cast or reduce sharpness. Always opt for a filter that is specifically designed for Polaroid photography and claims to be optically neutral.
Do I need a different ND filter for different lighting conditions?
Generally, a single ND filter is sufficient for most outdoor lighting conditions. However, in extremely bright sunlight, you might consider using a slightly stronger ND filter to further reduce the light. This is especially true for landscape photography.
What happens if I use SX-70 film in a 600 camera without an ND filter?
Your photos will be severely overexposed, resulting in images that are almost entirely white or washed out. The details will be lost, and the image will be essentially unusable.
Can I stack multiple ND filters to get more light reduction?
While technically possible, stacking ND filters is generally not recommended. It can introduce vignetting (darkening of the corners of the image) and potentially degrade image quality. It is much better to use a single ND filter of the appropriate density.
How do I clean the ND filter?
Clean the ND filter with a microfiber cloth specifically designed for cleaning lenses. Avoid using harsh chemicals or abrasive materials, as they can scratch or damage the filter.
Is there any advantage to using SX-70 film over 600 film in a 600 camera (besides the aesthetic)?
Some photographers prefer the color palette and lower contrast of SX-70 film. The softer, more muted tones can create a more vintage look. Also, SX-70 film is often slightly cheaper than 600 film.
Can I use a Polaroid OneStep camera (that uses 600 film) the same way with SX-70 film and an ND filter?
Yes, the same principles apply to any camera that uses 600 film, including Polaroid OneStep cameras. As long as you use an ND filter to compensate for the difference in film speed, you can use SX-70 film in these cameras.
Does the ND filter affect the distance or focus of my camera?
No, the ND filter only reduces the amount of light entering the camera. It does not affect the distance or focus. Your camera will still focus as normal.
How do I know if my ND filter is working correctly?
The best way to test your ND filter is to take a test shot in bright sunlight. If the resulting image is properly exposed, the filter is working correctly. If the image is still overexposed, you may need to try a stronger ND filter.
Is there a digital equivalent to using an ND filter for film?
Yes, in digital photography, you can use ND filters to reduce the amount of light entering the lens, allowing for longer exposures or wider apertures in bright light. You can also adjust the exposure settings in post-processing software to mimic the effect of an ND filter to a degree, though it’s not a perfect substitute for the real thing.
By understanding the fundamentals and following these guidelines, you can successfully use SX-70 film in your 600 camera and enjoy the unique aesthetic it offers. Happy shooting!