Yes, you can use 600 film in an SX-70 camera, but it requires a crucial workaround: the use of a neutral density (ND) filter. The SX-70 camera was designed for film with a much lower ISO (ASA) rating than 600 film, meaning it’s far less sensitive to light. Without an ND filter, your images will be severely overexposed and virtually unusable.
Understanding the Technical Differences
The core issue lies in the film speed. SX-70 film has an ASA (now technically ISO) rating of around 160. 600 film, as the name suggests, has an ASA of 600. This means that 600 film is about 3.75 times more sensitive to light than SX-70 film. Consequently, an SX-70 camera, designed to let in a specific amount of light for ASA 160 film, will let in far too much light when used with 600 film, leading to significant overexposure.
The solution, as previously mentioned, is the ND filter. These filters are specifically designed to reduce the amount of light entering the camera lens. By placing an ND filter (typically an ND8 filter, which reduces light by three stops) over the 600 film cartridge, you effectively lower the light sensitivity to a level compatible with the SX-70’s exposure settings.
The Importance of ND Filters
Think of it like this: Imagine you’re wearing sunglasses on a bright day. The sunglasses act like the ND filter, reducing the intensity of the sunlight reaching your eyes. Without them, the light would be overwhelming and uncomfortable. Similarly, without an ND filter, the 600 film in an SX-70 camera would be overwhelmed by light, resulting in a blown-out, overexposed image.
There are primarily two types of ND filters used for this purpose:
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External ND Filters: These are usually small, rectangular pieces of plastic or glass that are attached to the front of the 600 film cartridge before insertion. They are reusable.
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Internal ND Filters (Modification): This is a more permanent solution that involves modifying the SX-70 camera to include an internal ND filter that can be switched on or off. This is a more complex process best left to experienced camera technicians.
Using 600 Film with an ND Filter: A Step-by-Step Guide
- Purchase an ND Filter: Ensure you get one specifically designed for use with 600 film in an SX-70 camera. Look for an ND8 filter.
- Prepare the 600 Film Pack: Before inserting the film pack into the SX-70 camera, carefully attach the ND filter to the film pack. Most external filters come with adhesive to easily attach to the film pack. Make sure you completely cover the film pack lens.
- Insert the Film Pack: Insert the prepared 600 film pack into the camera as you normally would.
- Take a Test Shot: After inserting the film pack, take a test shot in typical lighting conditions. Examine the resulting image. If it is still slightly overexposed, you may need to adjust the lighten/darken wheel on your camera.
- Adjust Exposure (If Necessary): Fine-tune the exposure using the lighten/darken wheel on your SX-70. Small adjustments can make a significant difference. If the image is still too bright, move the wheel towards the “darken” setting. If it’s too dark, move it towards the “lighten” setting.
- Continue Shooting: Once you’re happy with the exposure, continue shooting as normal. Remember to always keep the ND filter in place while using 600 film.
- Remove the ND Filter (If Reusable): When the film pack is finished, carefully remove the ND filter from the empty cartridge (if it’s a reusable one) to be used on a new pack.
FAQs About Using 600 Film in an SX-70 Camera
Here are some frequently asked questions to further clarify the process and address potential concerns:
FAQ 1: Will using 600 film damage my SX-70 camera?
No, using 600 film with an appropriate ND filter will not damage your SX-70 camera. The only risk of damage would be from forcing a film pack that doesn’t fit, which is not the case when using standard Polaroid-type film packs.
FAQ 2: Can I use 600 film without an ND filter in a pinch?
While technically possible, it’s strongly discouraged. The images will be drastically overexposed, likely resulting in a completely white or washed-out picture. It’s generally a waste of film. If you must, use in extremely low-light conditions and set the lighten/darken wheel to full dark.
FAQ 3: Where can I buy ND filters for 600 film and SX-70 cameras?
ND filters are readily available online from retailers like Amazon, eBay, and specialized photography stores. Look for filters specifically designed for Polaroid 600 film packs. Many stores that sell Polaroid film will also sell ND filters.
FAQ 4: What happens if I forget to use the ND filter?
As mentioned earlier, the resulting image will be significantly overexposed, potentially rendering it unusable. You’ll end up with a bright, washed-out photo with little to no detail.
FAQ 5: Are there any SX-70 cameras that can use 600 film natively?
Some modified SX-70 cameras have an internal switchable ND filter. This is a professional modification that allows you to easily switch between SX-70 and 600 film. Unless your camera has been specifically modified, it needs an external filter.
FAQ 6: Is there a difference in image quality between SX-70 and 600 film?
Generally, 600 film produces images with slightly more contrast and saturation compared to SX-70 film. However, with proper exposure, both films can produce beautiful results. Some photographers prefer one over the other for artistic reasons.
FAQ 7: Can I use other types of film in my SX-70 camera besides SX-70 and 600?
No, SX-70 cameras are designed specifically for Polaroid SX-70 type film and Polaroid 600 type film (with an ND filter). Using other types of film will not work and may damage your camera.
FAQ 8: 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 typical lighting conditions. If the image is properly exposed and not overexposed, the filter is working correctly. Adjust the lighten/darken wheel as needed to fine-tune the exposure.
FAQ 9: Can I stack multiple ND filters for even more light reduction?
Yes, you can stack ND filters if you need to reduce the light even further. However, stacking too many filters can sometimes introduce vignetting (darkening of the corners) or color casts. It’s generally best to use a single ND filter with the appropriate strength.
FAQ 10: How long does Polaroid film take to develop?
Polaroid film typically takes 10-15 minutes to fully develop. Keep the photo shielded from direct sunlight during the development process for optimal results.
FAQ 11: My SX-70 camera is old; should I get it serviced before using 600 film?
If your SX-70 camera hasn’t been used in a while, it’s a good idea to have it serviced by a qualified technician. This can ensure that the camera is in good working order and that the exposure system is accurate. Regular maintenance will help prolong the life of your camera.
FAQ 12: Where can I find more information about SX-70 cameras and Polaroid film?
Numerous online resources are available, including websites dedicated to Polaroid photography, online forums, and YouTube channels with tutorials and reviews. Polaroid’s official website also provides helpful information.
Conclusion
Using 600 film in your vintage SX-70 camera opens up new possibilities for your instant photography. By understanding the technical differences and using the appropriate ND filter, you can confidently experiment with different film stocks and achieve stunning results. Remember to always prioritize proper exposure and to enjoy the unique and rewarding experience of shooting with Polaroid film. Embrace the quirks, learn from your mistakes, and most importantly, have fun!