Abstract: A rotatable disc is provided, for use in a photographic printer, supporting both scanning and large area transmissive filters. The disc is used to selective position a scanning or large area filter between a photographic negative and a single light sensor. The disc thus permits the single light sensor to be used to measure both the scanned and large area transmissive characteristics of the photographic negative.

Abstract: A photographic printer is provided including reflection densitometry apparatus for measuring the reflective density of a reflective patch or print. The apparatus includes a carrier separable from the printer for supporting a plurality of reflective patches. A light sensor is disposed on the printer, and means are disposed on the printer for supporting the carrier with a selected one of the reflective patches opposing the light sensor. Means are provided for illuminating the reflective patch, and means are provided for focusing the light reflected off of the reflective patch onto the light sensor. Further provided are means for selectively positioning at least one transmissive filter between the selected reflective patch and the light sensor.

Abstract: A photographic printer includes integral densitometry apparatus for performing scanned transmissive, large area transmissive, and reflective density measurements using a single light sensor. The densitometry apparatus includes a rotatable filter wheel supporting both scanning and large area transmissive filters used in making all of the density measurements. The scanning and large area density measuring apparatus use the same light projector as and share common optical hardware with that used to print pictorial negatives. The reflection densitometry apparatus includes a detachable holder for supporting reflective patches, and a second light source activated responsive to the introduction of the holder into the printer for illuminating the reflective patch.