Wide-angle Adapters on Large Format Cameras

[JPD]

So I tried the +4 and it’s exactly what I hoped. The angle of view is wide enough to capture the surrounding environment and the depth of field is shallow enough to look weird af. Like a totally sharp person surrounded by an unnaturally blurry world.

Wouldn't the resulting shorter focal length increase the depth of field?

 

[_T_]

F number is focal length/aperture diameter. So if you make the focal length shorter but keep the aperture the same size the f number will go down.

So for me my focal length went from 180mm to 105mm but the aperture remained the same size so the f number went from f/5.6 to f/3.3

The way it looks is like the diopter is taking the exact same image from the 180mm f/5.6 lens and shrinking the whole thing down. So in a way the shrunken image has more dof than the unshrunken image but relative to an actual 105mm lens you would have to buy a very expensive wide aperture large image circle lens to get the same look and they don’t really exist.

 

[JPD]

Ah, yes, I forgot about the relative aperture.

 

[ic-racer]

It would be pointless to use wide-angle adapters on a large format camera, because it would narrow the image circle. So, it would be a limitation on movements.

That said, I have a Horseman attachment that does the opposite. It converts a 150mm lens to a 300mm lens. Versus the front, it attaches behind the lens.

Which WA adapter was causing your problems? I suspect the adapter was causing vignetting. Try a larger diameter one.