Building a technical camera – Part II


Step Two of Building a technical camera: taking apart a GX680

For those of you who did not see my first post about it, you can find it here. In a few words, after many discussions with my photographer friend Satoru Murata, I decided to throw myself into a new project: building a technical camera that I can use to mount almost any lens on a Sony a7/II/R/S body, much like the Cambo Actus system, but on the cheap side.

Getting to it now. You will find higher and below a few pictures of the (very functional) Fuji GX6800 III I bought recently and took apart these last few days…

Scary, right? 🙂

Because it was the first time I took one apart, I actually ended up removing more parts than I should have, but I guess it does not matter too much since I’ll show you next that I basically milled (cut out with a power tool) entire parts of the camera (already done) and I’m now too committed to go back and put things back together.20150322_125815

To get to the bare minimum of the camera (front, back elements and railing, see the terrible phone picture below), all I needed to do was de-attach the bellows from the front and back elements, and mostly to unscrew and remove the camera body (back element) from the railing system.

11046131_10153153202593485_1501836423_oThe idea now is to keep the front standard as is, because it has all sorts of movements (tilt, shift, swing) for the lens. However, I want to modify (mill) the back element in order to remove the different parts with red arrows on the picture below: a couple of posts that were used to screw the body on and the front and rear metal parts on which it rested.

The goal is to create a platform on which I can fix a 2-way rail. This rail will eventually be used as a support for the camera board and it will allow for left/right shifting of the camera (great for shooting panos, blue arrows on the picture below).

Sans titre-1 copieI’m also thinking about adding swing to the back of the camera. The way I see it, it will require a precision rotating stage (similar to what can be found in science labs doing optics), but I’m having issues finding something cheap and precise enough. Ideally, it also has to be about 1 to 2 inches (~25-50mm) in diameter and I would like to have: a knob to rotate the stage, and one to lock in it place. It also needs to handle 3-4 pounds (~2kg) of weight. If you have suggestions, please fire away!

Conclusions of this part:

1/ Taking this guy apart was easy peasy, and probably the most straightforward part of the project. I can’t stress enough that I’m happy I’ll never have to put the Fuji back together. It seems now that I have multiple small parts all over my work table, and I have no clue where most of them would go 🙂

2/ Next part is using a milling machine to reduce some of the back element in order to create a nice resting platform. I’ll show you some pictures of this step, but if you are not familiar with how to work these machines, please don’t go ahead on your own repeating what I’ll do. You can get hurt. Badly. If not worse.

3/ If you are aware of where to acquire new or used (small 1 to 2” dia) rotating stages (with a precision adjustment knob and able to carry ~3-4 pounds), please shoot me a message. I am currently designing the next steps, and would love to get my hands on one. Worse case scenario, I’ll start with a prototype that does not have swing if I can’t find one.

4/ As usual, if you have questions or ideas, send them my way!

Till next time!


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