It’s not strictly true to say the SX-70 Sonar gives you no exposure information; a red light comes on in the viewfinder if there’s not enough light for a hand-held shot. Polaroid called this the ‘Use Flash Or Tripod Indicator’, but in terms of guidance, that’s your lot. All you know is you’re getting an aperture between f/8 and f/74, and a shutter speed anywhere from 1/180 to 14 seconds. I imagine the metering is a simple centre-weighted or average setup, but who knows?
As Watson sat in a small patch of sunlight, I had no idea if this shot would work, and I even forgot to look for the red light. At over two quid a pop, I really should be more careful. But hey, sometimes I have a good feeling and like to go with my hunch. Like that time I put £50 on Hilary to win. Or when I convinced everyone I knew to buy a hoverboard, just before the UK Government banned them on both roads and pavements. Yeah, so sue me.
Download the Polaroid SX-70 Sonar Manual