I still have my other lenses for situations where I need to stop down for an increased depth of field, like group photos, but I use the Bokeh Factory lens for 99% of my photos. The downside to this conversion is that the lens is now a fixed aperture lens. The bokeh is very unique and adds such a three dimensional look to the photos.

I really love the combo of the Pentax with the 80mm Zeiss lens. Most modern 35mm SLR cameras will eclipse the frame rate of a Contax 645, doing 7-10 frames a second or in some cases, even more at up to 30 frames per second, but the compromise one makes for speed is image size and image size equals quality. After experimenting with the different lenses, and shooting hundreds of rolls of film, I finally felt like I had found “my lens.” This is state of the art 1990s technology and at 2 frames per second is still the fastest frame rate that exists in a medium format camera. I eventually saved up almost $2000, and purchased the Contax 80mm F/2 lens. Looking for an alternative to the bulk and weight of the 105mm lens led me to The Bokeh Factory and their wide variety of lenses they modify to fit the Pentax 645 system. The downside of this lens is it is a large and heavy, not much fun to travel with. I really liked the lens, mainly the bokeh it produced and the ability to focus on subjects very close to the camera. I purchased the 105mm F/2.4 lens and an adapter to use it on the 645 system. The next lens I purchased was a lens designed for the Pentax 67 camera. This lens has the best autofocus capabilities and doesn’t add much weight to the camera. Medium Format Film Cameras BRONICA 645, Mamiya TLR, Rolleiflex 3.5, Rolleiflex 2. This lens is the equivalent to the 50mm on a 35mm camera. The first lens I used was the 75mm that comes standard with the camera. It opens up so many possibilities for experimenting with different lenses. One of the most exciting reasons I switched systems was the ability to adapt and use lots of different lenses for this camera. Lenses & Adapting Lenses for the Pentax 645Nii

Contax 645 medium format slr