In answer to your question as to whether older versions of the Noblex are available. The older version of the Noblex which uses the slow speed module and also has focus capabilities is called the Noblex Pro150 U as opposed to the currently available Pro150 UX. It will be less on the used market. Some differences are: 1 Some think it has a sharper lens. 2 The shift control must be accessed in the same way a filter is inserted -- with tweezers - and is not visable on the outside of the camera. 3 It has a less robust tripod mount socket. And 4 It does not have a separate Start button which starts the counter after threading the film. You simply push in the shutter button, then wind to picture #1. This early version also accepts the automatic exposure module.