Problem obtaining adequate depth of field with field camera

[Corran]

Aiming the camera slightly down and tilting the rear back functionally is the same as setting the camera plumb and tilting the front standard forward. Tilting the rear standard is not what changes the subject shape, the orientation of the film in relation to the object is, which can change regardless of where you apply tilt.

[Bob Salomon]

Aiming the camera slightly down and tilting the rear back functionally is the same as setting the camera plumb and tilting the front standard forward. Tilting the rear standard is not what changes the subject shape, the orientation of the film in relation to the object is, which can change regardless of where you apply tilt.

Tilting or swinging the back controls subject shape regardless if you are using direct or indirect movements.

[Corran]

But that's incorrect, one can use only front movements and control image shape by angling the entire camera just the same. There is functionally no difference between front and rear movements if the standards are in the same place in space.

[Bob Salomon]

But that's incorrect, one can use only front movements and control image shape by angling the entire camera just the same. There is functionally no difference between front and rear movements if the standards are in the same place in space.

No, back tilts and swings control shape. That is why back tilts control converging verticals due to keystoning.

[Corran]

There would be functionally no difference in the photograph made by these two cameras. One uses front movements with the camera tilted upwards, one uses rear movements with the camera plumb.



Do you dispute this?

[Bob Salomon]

There would be functionally no difference in the photograph made by these two cameras. One uses front movements with the camera tilted upwards, one uses rear movements with the camera plumb.



Do you dispute this?

Bryan, back movements control image shape. And Scheimpflug. Front movements control Scheimpflug only.

[Corran]

And yet I have shown how front movements can be used in lieu of rear movements or vice-versa, for those using cameras without one or the other. Saying that rear movements only can control image shape fundamentally mischaracterizes what is actually happening, relative to perspective.

[Bob Salomon]

And yet I have shown how front movements can be used in lieu of rear movements or vice-versa, for those using cameras without one or the other. Saying that rear movements only can control image shape fundamentally mischaracterizes what is actually happening, relative to perspective.

You are leaving the subject out of your illustrations.
If your back is plumb to, say a building, there will be no converging verticals. If your back is not plumb to the building there will be converging or diverging verticals, depending on which direction your back is tilted.

That is controlling image shape. Doesn’t matter what you do with the front standard.

[Corran]

Bob, that has nothing to do with what I'm saying. You can have the back plumb to a building regardless of whether the rear standard is tilted or not, in relation to the camera.

[Bob Salomon]

Bob, that has nothing to do with what I'm saying. You can have the back plumb to a building regardless of whether the rear standard is tilted or not, in relation to the camera.

Film (the back) controls the shape. Period. Just tilt your fixed back up at a building and watch what happens to it. If you don’t have a convenient building use a doorway.