equa
Aktiv medlem
Om det är shutterSPEED man talar om så är det nog den lägsta hastigheten som kameran tillåts välja som man vill kunna ställa in. Om det är slutarTID så vill man ställa in den längsta tiden som kameran tillåts välja.
Termen shutterspeed används dock oftast något oegentligt genom att man menar slutartiden.
Det vore intressant att veta vad det står i den svenskspråkiga inställningen.
Så måste det väl vara. Som sagt, jag är rudis på detta men så här skriver Friedman i sin bok där väl ändå "lowest" under rubriken måste ha råkat bli "slowest" - ökar åtminstone min förvirring ytterligare:
"6.23 ISO AUTO MIN. SS
Menu Position MENU 5 ISO Auto Minimum Shutter Speed
What it Does Specifies the slowest shutter speed the camera is allowed to go to before increasing the ISO (when ISO is set to "Auto").
Recommended Setting: "STD" unless you're doing action photography
You can think of this feature as a way to tweak the Program mode to your needs without having to move the exposure mode dial to Shutter Priority mode. Here you can specify the lowest shutter speed that the camera is allowed to use in Program or Aperture Priority mode before it resorts to raising the Auto ISO value. This can be a useful feature for people shooting sports and still want the benefit of a "set it and forget it" kind of automation.
This was a badly needed feature on Sony's RX-100 IV and RX-10 II (two cameras upon which my last book was based.) For the A7r II, however, the behavior in the auto exposure modes is different and so the need for this feature is not as great.
Here was the problem: Once upon a time there was a heuristic regarding the slowest shutter speed you could shoot with without needing a tripod (and without SteadyShot). That heuristic was:
Slowest shutter speed = 1/(the lens' focal length)
196 The “Recording” (Camera icon) Menu Settings
Contents of this book Copyright © 2015 Gary L. Friedman. All rights reserved.
So, if your lens was set to 70mm, the slowest shutter speed you could safely hand-hold the camera at was 1/70th of a second. And if your lens was set to 24mm, then the slowest shutter speed you could safely hand-hold the camera at was 1/24th of a second. Program Mode actually knows about this heuristic, and if it knows you're using a long lens it will up the shutter speed accordingly. But the A7r II will not let you shoot slower than 1/60th of a second in most circumstances (unless you've hit the upper limit of your Auto ISO setting.)
So the factory default behavior is pretty good. But the aforementioned RX cameras didn't stop at 1/60th of a second -- they would shoot at about 1/24th of a second (rounded up to 1/30th of a second). If the light got lower than that, only then did the Auto ISO get increased.
I didn't care for that, since if you're shooting pictures of people in low light, people tend to move. And at less than 1/60th of a second if people move they will come out blurry. NO OTHER CAMERA I'VE EVER USED WOULD GO BELOW 1/60TH OF A SECOND IN PROGRAM MODE for this very reason. Yes, 1/30th of a second might work great for still life shots, but if you're shooting people 1/30th of a second will just result in blurry pictures of the grandkids.
So I was happy when Sony introduced this feature on the RX-100 IV, since I could use it to tell the camera "Don't go below 1/60th of a second when in Auto ISO mode". (Because before that, I was recommending "Shoot in "P"rogram mode when the light is good, but switch to "S"hutter Priority mode set to 1/60th of a second when you get inside". That can be a lot of remembering.)
So is this feature meaningful for the A7r II? It can be useful in situations where you'd normally want to switch to Shutter Priority mode. Maybe you shoot equestrian events and never, ever want to go slower than 1/250th of a second (but you wouldn't mind going faster if the light was good). This would be the feature for you then. TIP: The shutter speed will indeed go slower than what you specify if the light is so low that the camera hits your maximum Auto ISO speed. (Of course you can specify that too…)
ISO Auto Min. SS 197
But wait – Sony has added new options to this feature. In addition to being able to choose a specific shutter speed as the lowest it, it gives you fuzzy choices: Slow, Slower, Fast, Faster, or Standard. I can't fathom any expert wanting to use such vague terms – how is the camera going to behave?
I did a quick test: I pointed my camera to a darkish indoor scene and set my Auto ISO high limit to ISO 12,800. Here are the shutter speeds the camera chose for each of the settings:
STD
1/60th of a second (this is what the camera would do in program mode on its own)
Fast
1/125th
Faster
1/250th
Slow
1/30th
Slower
1/15th
So I can best describe these settings as "one or two stops faster / slower than what normal program mode would do". Of course depending on your light level and the ISO Auto – High value you have set, you may see different behavior."