It's a bloody beauty that wetsuit!!!
Mark: Are you saying that you can't stop the camera from chucking up the gain? You must be able too, that's nuts...18db of gain is horrendous. Can you not leave the camera in manual but allow some things to be still in auto, then lock them off when about to shoot?
That wetsuit was a dream come true for me. I could change all kinds of settings and profiles and find her and shoot that wetsuit to do comparisons. When I have time, I will post frame grabs and show the different camera settings and the results.
Now about the gain issue... Yeah it is a really odd setup so let me try to explain:
If you engage Full Auto - called TLCS (Total Level Control System): The following things are done by the camera:
Auto White Balance
Now in this mode, you can set the following:
AGC limit ...just wait for it...
AGC on/off - Although the manual says this, it isn't true. It is contradicted on Page 42 where the selection of TLCS forces it ON.
The tracing speed of the TLCS
The AGC point (fstop trigger such as 2.8)
Auto Shutter on/off
Auto Shutter Limit
Auto Shutter Trigger Point (f-stop trigger such as 16)
Ok you waited long enough...Auto White Balance. - ...Now this is the real killer. I can't stand white balance shifting during shots so this means I cannot use Full Auto or TLCS.
Note: I can change the speed at which auto white balance occurs so I need to try it very slow to see how it performs) You can also force a white balance at any given time but it will drift.
Ok so now we are in manual mode and TLCS is thrown out the window.
To make a long story short... There is no AGC limit in manual modes. So it will shoot up to 18db if it has the chance.
Now you can set a hard limit to gain but this leaves you setting Iris, Shutter, and ND filters....I'd rather have a AGC limit so I can leave shutter out of the equation most of the time and concentrate on DOF shots and exposure with the other two.
Now your suggestion of Switching off of Full Auto just before pressing the record switch is worth continued investigation to see what changes can be controlled. However, since the AGC isn't limited, I imagine it might shoot up unless I turn it off. If I turn it off then it defaults to one of the camera presets. So that part may not work unless I set the limiter to say 3 or 6db and the preset at 3db or 6db so there isn't a shift there. The white balance will have the same issue unless I force a white balance just before turning off Auto. These two possibilities are worth looking into.
Edited by marksm, 08 September 2008 - 06:41 PM.