Any Fresnel with Split Image Focus Ring?

[RedSun]

Just wonder if there is such thing, the one uses in 35mm and MF cameras. That can help focusing nicely.

[Bob Salomon]

No and why would a large format shooter only want to focus in the very center of the screen anyway?

But you can buy 45 cameras that can rangefinder focus. A Linhof Master Technika can do that with lenses from 72 to 360mm and a Wista RF can do it with some 135, 150 and 180mm lenses.

Even some 57 cameras were able to RF focus. Like a Linhof Super Technika V 57.

Most users of these cameras today use the ground glass unless they are doing documentary or news with a large format camera.

[E. von Hoegh]

Not to mention the fact that the split image part will darken at around the maximum aperture of most LF lenses.

[Bob Salomon]

Depending on how large the split image part is. A microprisim might have been a better thought then a split image but neither would be practical for anything other then copy work.

[Jim Jones]

Not to mention the fact that the split image part will darken at around the maximum aperture of most LF lenses.

A split image focusing aid can be designed for any minimum aperture, but to me doesn't seem practical or necessary for LF.

[RedSun]

Well, I asked that since the middle of the fresnel has a large bright spot, very similar to the focus screen used in MF cameras. I just thought it may be helpful in focusing, at least in the middle. Then you move the view camera to better focus it...