Frequently here at the Cambo USA office we get asked questions that go something like this:
“I’m considering buying an Actus, and I don’t know what lenses to look for. What can you recommend?”
For anyone who has used an Actus (or have spoken with us at length) know that this is a very loaded question. Because there are so many different configuration options (and due to the nature of being able to adapt several hundred if not more legacy lenses to the system) it’s sometimes hard to quantify which lenses are going to work best for what system.
Without getting too technical, the answer to the compatibility question mostly relies on the Flange Focal Distance (FFD) of your camera body of choice when compared to the same measurement from your lens of choice.
FFD is the distance between the image plane (image sensor) and the front of the camera interface (mount or bayonet).
Generally speaking, for the greatest number of users, the Actar series of lenses will be a great starting point. These lenses were designed to offer the widest amount of usage across many different camera types. The only exception to this rule would be of course the Actus DB for digital backs (which is a whole other conversation in itself) because unless you are using a back with an electronic shutter, there is no way to trigger the capture process with these lenses.
“I see there is a ______ lens adaptor, can I use it on my camera?”
To make things a little clearer, please reference the below PDF for a general list of what modern or relatively available lenses could work to fit your needs. Or download a copy for yourself here.
This is not an end all list, because of the sheer number of lenses available that could possibly work. However, this should give a pretty basic starting point for looking at which options may be the best for your needs.
**Please note, some of these configurations may require additional bellows or monorails needed to achieve proper focus**