3 ms·

My Pana has noticeable shutdown lag (about 1.5s) suspiciously contrasting the immediate bootup/wake-up. I'd never have started suspecting that they do that hibe

by usrusr 6y ago

My Pana has noticeable shutdown lag (about 1.5s) suspiciously contrasting the immediate bootup/wake-up. I'd never have started suspecting that they do that hibernate trick if the shutdown started with screen-off instead of proudly (?) displaying a branded placeholder screen. Makes me wonder if maybe far more embedded systems that we know actually do have a slow boot process, but hide it in a slow shutdown that they run invisibly after screen off. If you are as curious as me, take one of your Nikon and flick the power-switch off-on quickly, that should show how deep it really went into off-ness.

formerly_proven 6y ago
If I hold the shutter down and flick the power switch on, it immediately takes a picture, if I flick back and forth it keeps taking pictures. There seems to be something like a 0.2 s delay between the click of the power switch and the clack of the shutter. That's more than the normal shutter lag (around ~50 ms for most DSLRs), but not much. If I do it two-handed I get around 2 fps out of the camera. The Z6 mirrorless which I also have is noticeably slower. I'd say around ~1.5 seconds from the power switch to the shutter. From the noises it makes I'm guessing it is doing something with the IBIS in that extra time, which the DSLR does not have. Power-up (remove battery, move power switch to "on" position, insert battery, observe time until meter (DSLR) or EVF (mirrorless) turns on) takes both of these around 1.5-2 seconds. Edit: Old film Nikons also had pretty clever "power management". For example, on the Nikon FE the meter circuit is switched on and off automatically with the advance lever: If the advance lever is flush with the body, the cameras is off and the shutter is locked. Moving it to the shooting position (where it sticks about a centimeter out) the meter is powered and the shutter is unlocked. Even while advancing the film the meter is powered off. Very clever. Batteries last forever in it.
- usrusr 6y ago
  I don't know why, but I enjoy this little round of remote reverse engineering, thanks for playing along. "Cycling with shutter button pressed" is a very interesting technique, particularly when pointing at some digital stopwatch as timecode or something like that. Another interesting specimen is the tiny RX0 I use for quick snapshots on the go, it seems to light up "services" to the screen in almost random visible order, with noticeable differences between a "doubleclick" restart and starting from settled state (e.g. screen lights up much later in the sequence on quick turnaround)

by usrusr 6y ago

formerly_proven 6y ago

If I hold the shutter down and flick the power switch on, it immediately takes a picture, if I flick back and forth it keeps taking pictures. There seems to be something like a 0.2 s delay between the click of the power switch and the clack of the shutter. That's more than the normal shutter lag (around ~50 ms for most DSLRs), but not much. If I do it two-handed I get around 2 fps out of the camera. The Z6 mirrorless which I also have is noticeably slower. I'd say around ~1.5 seconds from the power switch to the shutter. From the noises it makes I'm guessing it is doing something with the IBIS in that extra time, which the DSLR does not have. Power-up (remove battery, move power switch to "on" position, insert battery, observe time until meter (DSLR) or EVF (mirrorless) turns on) takes both of these around 1.5-2 seconds. Edit: Old film Nikons also had pretty clever "power management". For example, on the Nikon FE the meter circuit is switched on and off automatically with the advance lever: If the advance lever is flush with the body, the cameras is off and the shutter is locked. Moving it to the shooting position (where it sticks about a centimeter out) the meter is powered and the shutter is unlocked. Even while advancing the film the meter is powered off. Very clever. Batteries last forever in it.

usrusr 6y ago
I don't know why, but I enjoy this little round of remote reverse engineering, thanks for playing along. "Cycling with shutter button pressed" is a very interesting technique, particularly when pointing at some digital stopwatch as timecode or something like that. Another interesting specimen is the tiny RX0 I use for quick snapshots on the go, it seems to light up "services" to the screen in almost random visible order, with noticeable differences between a "doubleclick" restart and starting from settled state (e.g. screen lights up much later in the sequence on quick turnaround)