Re: Zeiss Ikon Nettar - help!
I believe you have to wind the film until the 1 is in the first window, take your shot then wind on till the 1 is in the second window. This should give you 16 negatives at 645 format (6cm x 4.5cm in portrait format). Just to confirm that I am talking about the right camera, is the viewfinder upright (portrait format) or landscape format?
The problem is that there were several Zeiss cameras named "Nettar", some taking 645 negatives, some taking square 6 x 6cm negatives and some even taking 6 x 9cm negatives. The viewfinder usually gives you a clue - 645 = portrait format finder, 6x6 = square finder, 6x9 = landscape format.
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