I have a Busch C 2 1/4 x 3 1/4 and it has a small lens board that was not made to take off, in that it has four screws that hold it in and not a slide. The original 101mm lens is very clean and I believe the camera wasn't used much at all. The Kalart is set correctly and accurately and I converted the spring back to a Graflex 23 back so I can used my roll film holders and Grafmatic holders without the ground glass component. I can use film holders which I have plenty of with it as normal. The nice thing about this camera is I can rack it right out for some extreme close ups. It feels right in use too and is easy on the eyes as it is a piece of history that's passing. Bring it out and I get a lot of questions to field. Like where is the battery and how many megapixels does it have.