Technical data

guide number is given in meters, convert the flash-to subject distance into

meters and then divide.

Example with GN 20 electronic flash unit

When shooting a subject at a distance of 5meters by using an ASA 100 film

and an electronic flash unit with a guide number of 20(ASA 100 in meters),

the correct aperture will be:

20 (GN) DIVIDED BY 5 (Distance in meters) = 4 (F4)

INTERCHANGING THE CAMERA BACK/INFRARED PHOTOGRAPHY

Interchanging the Camera Back The camera back of

your CONTAX RTS can be interchanged with the Data

Back or 250 Film Back available as optional accessory.

Remove the camera back as illustrated while pushing

down the back cover release lug.

Infrared Ray Photography In case of infrared ray

photography, focus compensation must be made after

securing focus in the normal manner by sighting your

subject through the viewfinder, For focus compensation

in infrared ray photography, use the R index on the lens

barrel. After focusing in the normal manner, turn the

focusing ring and align the subject distance with this R

index.

· In case of infrared ray photography, always use a red

filter.

· For proper exposure setting, read the instruction sheet which comes with the infrared ray film carefully.