operating with swing and tilt lens system on steadicam
Posted 13 April 2007 - 12:02 AM
Posted 13 April 2007 - 02:32 AM
2nd: swing/shift of focus is mostly visible on low F-numbers, meaning your focus puller is going to have a fun time...... not!
combined with the fact that the calibration might have little accuracy...... (if you can manage your focus motor on the control)
It is possible but the problem is in my opinion, that with these lenses you really have to see and know what you want in focus in your shot.
since you are not looking through the lens but on a low resolution video screen, you don't really know if what you see on your monitor is really in focus, and when it is wrong it is really not nice to look at.
so it might be a bit of a guess, when you get the rushes back things that appeared in focus on tv might be just that annoying bit off.
Posted 13 April 2007 - 11:03 AM
Posted 13 April 2007 - 11:07 AM
Depending on the swing/tilt package you have , you might need some rods to hold the lens so think about the bridge plate that add weight. If the lenses don't need the support, putting a motor on the iris should be fine but a lot of complications for focus. First problem is the lens will probably be "crooked" and I have not seen a "dutch" motor bracket yet, then if you can actually put a motor on, the references are different with every move you make on the lens, so calibrating will result in a very painfull experience and time consumming. The 2 times I have used Swing/tilt lenses were on music videos and we all agreed not to try to pull focus and live with the "artsy" results.
There is one picture of me with the ARRI swing/tilt lenses on a 435. You can see I had to link the camera to the sled by using the "studio mode " accessories like the sliding plate, bridge plate and 15mm rods to use the lenses. And no motor on. Sorry if the picture is not very relevant.
Posted 13 April 2007 - 12:11 PM
Posted 30 April 2007 - 10:03 PM
I tried with once with a band connecting the focus motor to the knob on the swing of the lens - it quickly worked it's way off and I ended up pulling focus myself on a whip. Not too bad actually, you look through the viewfinder and get marks (don't take your hand off the whip) then memorize hand positions with foot/framing ones and it kind of works. Worth a try when they want that 'dreamy' look and it doesn't have to be too steady.