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Fair enough! Then I would suggest the following based on all the above:
Clicking the jogwheel will switch between the following speed settings:
- Single-step
- Slow
- Normal
- Fast
The textual representation of the currently selected speed would be displayed somewhere on screen during playback such that one gets feedback on what the current setting is when pressing the button.
The % settings for each such mode would have a reasonable set of defaults based on testing, but could optionally be fine-tuned in the camera settings somewhere if one wants to have more fine-control over those speeds.
Having those textual representations will make more sense to the average user, while still being able to be fine-tuned in camera settings if desired (to whatever granularity needed).
I think the press-to-hold-select speed you suggest would be even easier if just using "push to open", "Push to close" the settings window, then you don't need the dexterity to actually press-hold-rotate at the same time. As the currently selected "speed" would be pre-selected when pressing, you can always get rid of the settings easily by just pressing a second time if doing it by mistake.
But thinking about it, with the possible exception of single-frame stepping, wouldn't one always want to use a fraction of the buffer length (%) as the speed selection?
The actual % above probably are good, but real-world experience needed to nail them down
) and you need a lot of clicks.
1. One frame per click is too-fine. Most people only care about getting close enough to the section of the frame buffer they need to save. You want to have handles on your video anyway, so you will save a little bit before the area of interest and a little bit afterwards, 5-10 seconds is what most people I have seen recommend. If people need to go over video frame by frame they will typically do this later when on a PC with a large monitor.
2. Holding the jog wheel down while turning is impractical. If this was a jog wheel on a desk or control panel there would be no problem, but this is a camera on a tripod or handheld.
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I personally think push and hold needs to be abandoned, instead pushing and releasing the jog wheel cycles through the jog rates.
Some lenses such as the Computar 12.5-75mm can be rotated relative to the mount to correct this, by loosening a black ring near the lens mount.
The more you play with the camera, the better. I would suggest using the largest aperture, set your focus, then increase the speed of the shutter which will darken the imagery.
