hey there :-) im working on controlling canon XL lenses.
Here a little background:
My Name is janosch im working full time as an engineer and in my free time as photographer and cinematographer.
Because there is no affordable slow motion raw camera on the market i decided to build my own :-) the MiniRAW
Its based on a small industrial point grey flea 3 usb3 camera which can shoot up to 120fps at 12 bit and 720p.
One downsize is that the sensor is only 1/3" and it has a 7x crop compared to 35mm. Now the Canon XL comes in play
it also has a 1/3" sensor and some fine optics! for example an 3-10mm which would be in 35mm world 21-70mm nice?
Problem: The canon xl lenses work only with a canon xl1s attached cause there is no mechanical iris focus and zoom...
Solution: try to emulate the camera with an arduino :
= works
i hijacked the spi bus with an saleae logic analyser and sent the data with an arduino back which works BUT now the tricky part:
i know which byte is the iris and the zoom the focus not quiet sure. at the moment i sent pre recorded packets ( which contain 40 bytes each)
and as you can see in the video it opens the iris and then the zoom and focus ring work..BUT because i sent always the same packets the lens is confused if it should listen to the arduino or to the lens input.
any ideas how can program this? my goal is to mount the lens in front of my MiniRAW1 and control focus zoom and iris.
hope thats understandable
cheers and thx
janosch