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Here's another version of the 3D view during exposure with the focal plane shutter slit moving over the scene, building up the image.


http://www.photoplaza.nl/lindolfi/Lartigue3DSlit.gif

Thanks Ole.

The 3D reconstruction shows some more insights
First the situation seen from above. The dark lines indicate the view cone of the camera during exposure:

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Struan, this may be the best one for sale in terms of size.

In my book "The Camera" produced by Times Life Publishers from 1971 on page 162 and 163 there is a large print, but the resolution is...

Yes Bill, that can not have been an accurate number. The only accurate number is the average velocity of the car on the photograph, which can be back calculated from the table on this site. The...

Here is a correction concerning the situation in which Jacques Henri Lartigue made the photograph:

According to "The Camera" published by Time Life International in 1971, the photograph was made...

Thank you Ole. 9x12 is correct ofcourse, also according to McKeown's. The length is nearly the same as 4x5. However, if you are right about that 135 mm (still a normal length for 9x12 and not wide...

From the difference in size of the two hindwheels and the width of the Delage Type F, I calculated a focal length of between 210 and 240 mm on 4x5, so that is longer than normal at that filmsize....

Struan, fitting an ellips is something different from fitting a skewed ellipse. They are not the same mathematical shapes. A skewed ellipse has its minor and major axes at another angle than 90...

Thanks very much indeed for the interesting comments.

Struan Gray, the deformation of the wheel starting from a circle only consists of a difference in horizontal and vertical scaling and an...

Jacques Henri Lartigue was an extraordinary photographer. He was a recreatonal photographer and did not have to earn his money with photography, being born in a wealthy family. At a tender age he...