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Changing partly exposed films
If you want to change a film that you have only partly exposed, first rewind that film into the
cassette (page 12). Rewind only as long as the reversing button rotates then stop. This will leave
the trimmed film leader outside the cassette. Remove the film from the camera and mark on the
cassette the number read off the film counter. When reloading the partly exposed film at a later
date, first load it in the usual way and set the film counter to the diamond, then operate the rapid-
wind lever with the film release button depressed until the number that you have marked on the
film cassette reappears in the film counter window.
Eyesight correction
If you use spectacles but do not wear them while taking pictures and so cannot see the finder
image clearly, you can order a special correction lens from your photo dealer. This lens screws
into the finder eyepieces mount. When ordering please state the exact power required in dioptres
+or -. No correction lenses can be supplied for correcting astigmatism.
Care of the camera
Protect your lens against damage and avoid finger prints on the lens surface and the finder
windows. For cleaning outer glass surfaces preferably use a soft sable brush or special lens
tissues. From time to time also dust the film track and cassette chamber with a brush.
Filters
Filters are used with black-and-white films to obtain correct tone rendering and for special
effects. With colour films, used in a camera such as the RETINA automatic, filters are used to
change the colour of the light to suit the particular colour film in use.
Most filters have what is called a filter factor. This is the factor by which the exposure must be
increased to compensate for the light absorbed by the filter. With the RETINA automatic I, this is
best allowed for by reducing the film speed setting
as follows:
Reduce the film speed setting by the following number of divisions
Kodak Filters for Black-and-White Films
Light yellow (F 1) - 2
Medium yellow IF II), yellow-green IF 111) - 3
Blue (F VI) - 4
Orange IF IV) - 5
Red (F V) - 4
The above filters must NEVER be used with colour films.
Kodak Wratten Filters for Colour Films
Wratten No. 1 A Skylight (ultra-violet) 0
Wratten No. 85 (amber) for using Kodachrome Film TypeA for daylight exposures 2
Wratten No. 85 B (amber) for using Ektachrome Film Type B for daylight exposures 2
Wratten Nr. 85C (amber) for using Ektachrome Film Type F and Kodachrome Film Type F