刺青的男人
Dallmeyer Serrac 2" F4.5 + Dallmeyer Colour Filter + Benoist-Berthiot Cinemascope
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紋身的女人
Carl Zeiss Jena Tessar 7.5cm F2.8 (Original standard lens for Exakta A c.1933 27 roll film SLR)
Take a ride on grany's scooter !
If you have any Petzvals, in which you are not sure of the speed, what you should do is this. Mount them on a camera and focus at infinity. Then measure the distance from a point that is halfway between the two elements and to the actual ground glass. Say that is 5". Convert that into mm. Then measure the glass and divide that into the mm equivalent of 5"
Petzval type lenses
It is fairly easy to known the maximum aperture of a Petzval lens,simply take the measurement for the width of the actual glass and divide this into the focal length.
