My SG shutter goes down to 1/10th second - However, I make an assumption that the smallest slit should be set with the slowest tension - (Aperture D with Tension 1 = 1/500th sec) I have found the SG shutter to be fairly accurate
I will take it to town today and try - Results to follow, though I really need a big road, which could we weeks away
Anyway, I feel this is the only one way to find out
Your shutter speed is too slow. Go back and read my post #4.
You must use a shutter speed fast enough that the shutter aperture is a moving slit.
Correct, you need a thin slit traveling at a slow speed. In my example in post #11, I was trying to reproduce the effect seen in Rober Doisneau's photo of the man and woman twisted around each other. If you look closely at her feet, and follow the line of her legs, you'll see that they're twisted oddly. It's not as great of an effect as I would have liked to get, but it's close. At some point I'll try this again and hopefully have better luck. I was using the 1/1000 slit, but "hand winding" it so it traveled across the film in about two to three seconds.
I ran other tests using the different FP shutter speeds on my Pacemaker SG and was able to get some bending on the upright poles of the merry-go-round with smaller slit openings, but no twisting of my model as in Robert Doisneau's photo.
I was shooting sports with a Speed Graphic in the early 1960s and tried very hard to __avoid__ this kind of distortion.
Times change. :D
i thought, yhis image was an example of horizontal shutter distortion with fast-moving subjects, which is different to focal-plane distortion.