I funded the Lomography Petzval Lens through Kickstarter last summer and received the lens last week. I wanted to go out and shoot with the lens mounted on a Nikon FM2 and digital Nikon D5100. I discovered that there is much to learn when using a old style lens. I need to learn more about shooting the uncoupled lens with the digital camera before I try it again. I was unable to make that combination work, so the lens was mounted to an FM2 and loaded with roll of 35mm Ektar film (100 ISO) for my first outing. I have no doubt that I will be able to use the lens with my digital SLR, but a little research and practice is needed before I take that combo out for my next test shoot.
The lens is beautifully made and a pleasure to hold when mounted on the Nikon F or FM2. I find it amusing that it is harder to use this lens with the more advanced digital camera.
I will post my results and thoughts about my first rolls of film and the lens performance later, when I've had a chance to process and examine my film.