Polaroid has jokes...

[rulnacco]

If you're a studio photographer, a really fun thing to do is to buy this little device:

http://www.sx2pc.com

With that, you can connect your SX-70 to a studio flash (or other) and give it the light the film craves. I hook mine up to a Speedotron 2400 watt second pack--it really kinda needs all that power--and shoot mostly portraits with it. You can get really, really nice results with that.

 

[Nicholas W]

It is common to modify the SX70 to shoot 600 film.

And you will have 8 overexposed shots. I believe the film you bought is ISO600 while the camera was for ISO80.