The camera review this week was a donation from Mike Williams in Hickory, North Carolina. Mike found the 7s at a local yard sale for $5.00 (US) and shipped it out west. Make sure to check our Mike’s current project on Youtube, 12 Months/12 Cameras, where he shoots an entire month with a single camera and shares a video review.
The Petri 7s was manufactured by the Petri Camera Company from 1963 – 1976. Features: coupled rangefinder focus, around-the-lens selenium light meter, shutter speeds from 1 to 1/500 sec, and a 45mm f/2.8 – 16 lens. The Petri company called their rangefinder focus system the Green-O-Matic because the overall viewfinder is tinted green while the focusing area is yellow. The idea was that contrasting colors made it easier to focus.
After the Petri 7S arrived, I purchased a telephoto and wide angle diopter set from a user in a vintage camera group on Facebook for $12. The diopters are screwed in to the 52mm thread mount, and the viewfinder is attached to the camera cold/accessory shoe. My results with the diopter set are mixed. This is the first time I’ve used diopters with a rangefinder camera. In the digital world, my experience with adding more glass in front or behind a lens results in difficult focusing and poor image quality.
The selenium light meter on the Petri 7s circles the lens. This design was initially created to allow the meter to read the light behind an attached lens filter. The camera has two match-needle meters. One is visible in the viewfinder, and the other on the top of the camera body. In this particular 7s, the needles on both do not display the same reading. In some of my images, I tried to split the difference between the two with little success. I had much better results metering with my Gossen Luna Pro S handheld meter.
You can find the Petri 7s for as cheap as $8.00 (US) on eBay, and there are a lot of them. While I really enjoy a good rangefinder camera, this one ranks towards the bottom of the list. And not because of the meter issue. That’s almost expected with a selenium meter on a camera that’s a) this old and b) you don’t know how it was stored. My test images were shot on Film Photography Project’s Edu 200 BW Film. There was some scratching on the negatives in most of the images that I intend to investigate. If I had to pick a rangefinder from 60’s or 70’s, I’d consider a Yashica or Minolta over the Petri. However, for less than twenty bucks, it was worth the gamble. Do you have a any of the Petri rangefinders? I’d love to hear your thoughts in the comment section below.