Depth of Field Adapter on Steroids

fferreres wrote:

Quick question to thread follows, can a bellows like this be a starting point for trying out the kind of thing in this thread?

https://www.ebay.com/sch/625/i.html?_from=R40&_nkw=%28double%2C+dual%29+bellows&LH_TitleDesc=0

Of course, this is terribly expensive, but I am thinking more generically, starting with something that already has movement of rear, mid and front, and think a monorail setup could be good. I am thinking 4s5 would be best for experimenting as well.

That looks like a good way of doing it. Having bellows on both ends will allow using more than one lens (being rigid and of a fixed length, the DIY Perks rig will only work with one lens).

Similarly, Bosun Higgs mentioned putting two large format cameras back-to-back - a couple of leaky Omega 45s (patched with gaffer's tape maybe?) would be pretty attainable and worth experimenting with, but you probably won't be approaching the DIY Perks rig's DOF emulation of f/0.4 on a 4x5-based rig - you'd need a f/1.5 or f/1.6 lens for that, and I don't know that there are lenses that fast for the format, especially not cheap or readily available ones.  The movements could make up for that, though.  I'm also pretty out of the loop when it comes to large format lenses (and medium format lenses for that matter).

On a 4x5-based DOF adapter rig, f/2.5 via an Aero Ektar, f/2.8 via a Xenotar, or f/2.9 via a Pentac gets you f/0.67, f/0.74, or f/0.77 equivalent aperture emulations, respectively.