On the occasions that this does work, then it produces great photos, however, so many pictures jam and don't come out of the camera and get ruined, it is just not worth the risk.

Great solution! I only find it diffcult to put the darkslide back in the pack once when the NDfilter is attached.So swapping films can be difficult

So with great hope I thought the filters would be a good idea... sigh they didn't work for me. My SX-70 had issues advancing the film. Nothing would come out. I even double checked my filter and still nothing. Maybe my Sx-70 Sonar AF doesn't like the filter.

This worked really well for me. No issues with installation & during use. It works better than my refurbished SX-70 with built in ND lens because it doesn't look dark through the viewfinder as the filter is over the film pack as opposed to over the lens. Best part is the smart combo, TIP should do more of this kind of offers besides the multiple packs. Such a boon for mankind!

I purchased these filters & installed one as per the instructional video. The first 6 shots were absolutely GORGEOUS, but then on the 7th shot, the filter somehow jammed up & the last two pictures in the pack were exposed when I ducked into a closet to pull the filter off the pack. I love the results I got from the first 6 photos, now I just have to find a way to keep it from jamming mid-pack.

i instaled filter propertly... it correcto exposition good but pictures doesen't come out of camera so i need to do lot of additional things to get thm out of ther. so my conclusion is that is mor problem than fun with it...

unfortunately the first time I used this filter, 2 photos came out instead of just one, both completely wasted film with nothing on it. I was nervous to shoot a third, for fear that 2 more wasted shots might appear, but the third did come out alone, but overexposed and with light leaks. I am using the gold edition pz 680 but doubt that should bear any cause. Depending on how the last 5 shots emerge, I may not continue using this filter...bummer.