I got a sweet old Agfa Isola I camera from ebay and took it for a test drive with some Arista 100 (a.k.a. Fomapan 100) film. The camera has a single element meniscus lens which makes it similar to a Holga lens. Shutter speed is 1/30 and the apertures are f11 or f16. There is also a build in yellow filter. I was quite impressed at the sharpness of the photos considering the lens design. I would have hoped for more vignetting but the top of many of the images goes nicely blurry.