Back Focus Adjustment - P+S Technik pro35 Image Converter MKII User Manual

2.3.2 Flange focal distance and Back focus:
There are two lens mounts on the PRO35 Image Converter: on the lens side (PL Mount,
Nikon...) and on the camera side (Bayonet Mount). Hence there are two possibilities to ad-
just the fl ange focal distance:
1. The lens mount for the fi lm and photo lenses (on the front of the Image Converter); has a
preset fl ange focal distance, identical to fi lm cameras.
The fl ange focal distance on the lens mount (front) can be adjusted or collimated with
an inferior fl ange or on a collimator (see also Service Manual for the PRO35 Image Con-
verter)
2. The camera side Bayonet Mount of the PRO35 can be adjusted with the back focus
screw:
When is an adjustment of the camera side fl ange focal distance / back focus
necessary?
– In case of changing the camera
– In case of variation of temperature + / – 10 °C
– In case of high mechanical load onto the mount of the camera (heavy zoom lens or similar)
– After transportation of the unit respectively other heavy agitation.
18
Different than on fi lm cameras the fl ange focal dis-
tance is NOT given respectively or is different in
dependency from several factors.
The PRO35 offers naturally the possibility to adjust
the fl ange focal distance. Therefore it can be used on
every camera with adequate Bayonet Mount.