Their most common 4? inch shutters had four slit widths ranging from 1?to [ ! inch and up to six spring tensions for a speed range of 1 / 10 to 1 / 1000 second.
12.
The Widelux produced a 140?wide image in a 24?9 mm frame on 135 film with a Lux 26mm f / 2.8 lens and controlled shutter speed by varying rotation speed on a fixed slit width.
13.
Where " L " is the slit width, " R " is the distance of the pattern ( on the screen ) from the slit, and ? is the wavelength of light used.
14.
The narrow slit width not only enables the capillary feed, but, when combined with the sharp channel edges directly opposite the accelerator, also ensures that a high electric field strength is obtained near the slit exit.
15.
The jet disturbance ( vortex ) speed from orifice to edge will vary with mean speed " U ", edge distance " h ", and slit width " d " as suggested in the Edge Tone section.
16.
Although the Square shutter improved the FP shutter in most ways, it still limited maximum flash X-sync speed to 1 / 125 s ( unless using special long-burn FP flash bulbs that burn throughout the slit wipe, making slit width irrelevant . ).
17.
What I want to know is that if we use a wave of amplitude 3.0 cm and subsequently a slit width of 3.0 cm to ensure maximum diffraction, and have the gap between the slits of 10 cm ( big I know ), what is the slit separation?
18.
As perfected in the 1954 Leica M3 ( West Germany ), a typical Leica-type horizontal FP shutter for 35 mm cameras is pre-tensioned to traverse the 36 millimeter wide film gate in 18 milliseconds ( at 2 meters per second ) and supports slit widths for a speed range of 1 to 1 / 1000 s.
19.
Note that the Contax ( Germany ) 35 mm RF camera of 1932 had a vertical travel FP shutter with dual brass-slatted roller blinds with adjustable spring tension and slit width, and a top speed of 1 / 1000 s ( the Contax II of 1936 had a claimed 1 / 1250 s top speed ), but it was woefully unreliable and not an antecedent of the modern Square shutter.
