Canon Min Shutter speed /Auto ISO/ Safety shift question
Apr 6, 2013 04:58:46 #
Had some time to kill over the last few days, so started playing with a few of the menus and options on the 5D MkIII
Under
Shoot 2 Menu ( Second Red Menu page)
ISO Speed Settings
Min Shutter Speed.
That setting is supposed to allows you to set a minimum shutter, speed. Thought it was used in conjunction with the Safety Shift Feature (C.Fn1 Exposure) last entry Safety Shift).
My understanding is that if you set the Min shutter speed to say 1/30th and ISO safety shift was set to ISO, then the camera would not drop below 1/30 and if it needed more exposure, than 1/30th then the ISO would start increasing...
BUT IT does just not seem to work....
Software bug ? or is there something else to it that I am missing?
Under
Shoot 2 Menu ( Second Red Menu page)
ISO Speed Settings
Min Shutter Speed.
That setting is supposed to allows you to set a minimum shutter, speed. Thought it was used in conjunction with the Safety Shift Feature (C.Fn1 Exposure) last entry Safety Shift).
My understanding is that if you set the Min shutter speed to say 1/30th and ISO safety shift was set to ISO, then the camera would not drop below 1/30 and if it needed more exposure, than 1/30th then the ISO would start increasing...
BUT IT does just not seem to work....
Software bug ? or is there something else to it that I am missing?
Apr 6, 2013 05:24:50 #
Neilp wrote:
Had some time to kill over the last few days, so s... (show quote)
Info about it.
http://www.pointsinfocus.com/learning/cameras-lenses/canon%E2%80%99s-safety-shift/
Apr 6, 2013 05:28:27 #
This feature works in P or Av modes. You also need to set your ISO speed to auto. The camera then selects a higher ISO speed if the camera senses a shutter speed slower than the minimum shutter speed you selected. If you're doing this, then something is wrong with your camera. See page 128 of the manual.
Apr 6, 2013 05:46:36 #
DavidT wrote:
This feature works in P or Av modes.
Yep, got that bit from the info page on the Menu on the camera
DavidT wrote:
You also need to set your ISO speed to auto.
You also need to set your ISO speed to auto.
No that is not it, as Safety Shift works with manual setting of ISO if P or Tv or Av are used
DavidT wrote:
See page 128 of the manual.
I must have an old manual pdf..my page 128 is Image playback.
I think it is just that it is my understanding of how I hoped it would work as opposed to how it actually does work.
The Minimum Shutter speed setting IS ONLY in conjunction with Auto ASA, it does not have any connection to the Safety Shift settings. i was imaging they were connected, but it seems not.
Off to look for an updated pdf download, as I have been scouring my manual all morning and did not find anything to help
Apr 6, 2013 08:45:27 #
Neilp wrote:
I must have an old manual pdf..my page 128 is Imag... (show quote)
I see what you mean. I tried using the Safety Shift, and I can't get it to work either. Must be doing something wrong. A challenge for today...
Apr 6, 2013 09:09:32 #
I see what the issue is
Safety shift has no connection at all with regard to the minimum shutter speed setting.
Try this. Set safety shift to ISo.
Set Av mode
100 ISO
Minimum aperture . I have one lens here that goes down to f36.
point the camera in to somewhere dark, or leave the lens cap on.
You shoudl see safety shift in action. shuteer speed will go down to 30 seconds then the ISO starts going up.
The minimum shutter speed setting dos not have any effect on this at all.
Minimum shutter setting works when the ISO is set to Auto
Safety shift has no connection at all with regard to the minimum shutter speed setting.
Try this. Set safety shift to ISo.
Set Av mode
100 ISO
Minimum aperture . I have one lens here that goes down to f36.
point the camera in to somewhere dark, or leave the lens cap on.
You shoudl see safety shift in action. shuteer speed will go down to 30 seconds then the ISO starts going up.
The minimum shutter speed setting dos not have any effect on this at all.
Minimum shutter setting works when the ISO is set to Auto
Apr 6, 2013 09:28:12 #
Neilp wrote:
I see what the issue is br br Safety shift has no... (show quote)
You found your own answer. Thanks for sharing it. I wonder if the 30 seconds shutter speed can be changed. Otherwise, I see no practical benefit in using Safety Shift.
Apr 6, 2013 09:51:57 #
Yep, that was what i was hoping.
But I do still see a place foe safety shift...ISO mode Imagine you have set Tv to something like 800 for a sports event, maybe with 200 ISO set. With a fastish lens you are getting good exposure on a sunny day with ISO staying at 200.
But go indoors, or a shadow area and you get under exposed..but safety ISO shift knocks the ISO up to safe the shot.
OK, so you could also have set Auto ISO and it would have done the same..but the issue with Auto ISO is that you are going to have shots with ISO setting all over the place. Safety shift ISO will only change the ISO if it really has to.
Not either defending ti or slagging it off..just my observations form playing with it in the last hour or so
But I do still see a place foe safety shift...ISO mode Imagine you have set Tv to something like 800 for a sports event, maybe with 200 ISO set. With a fastish lens you are getting good exposure on a sunny day with ISO staying at 200.
But go indoors, or a shadow area and you get under exposed..but safety ISO shift knocks the ISO up to safe the shot.
OK, so you could also have set Auto ISO and it would have done the same..but the issue with Auto ISO is that you are going to have shots with ISO setting all over the place. Safety shift ISO will only change the ISO if it really has to.
Not either defending ti or slagging it off..just my observations form playing with it in the last hour or so
Apr 7, 2013 12:32:03 #
ole sarg
Loc: south florida
I don't know guys, my original leica IIIf never had these problems. Nor my Nikon F2 or canon fpql, etc.
My question is why does one need all this stuff? Does it get one a better picture?
You look at the published stuff and all it says is fstop, ap and speed!
My question is why does one need all this stuff? Does it get one a better picture?
You look at the published stuff and all it says is fstop, ap and speed!
Apr 7, 2013 13:24:45 #
Nor my Canon F1n :) or Fujica ST605
You are correct, no one needs it, but if it is there you may as well understand what those settings do and have them set as yo would liek them for the day when you grab the camera, turn, point and shoot with the settings otherwise wrong...like you left it in manual from the last shots you took. Something like this may just save the day, by knocking the ISO up a few stops and giving an image you can use.
I'd be just as happy if these cameras had none of this, but since it is there I'd like to know how to use it.
You are correct, no one needs it, but if it is there you may as well understand what those settings do and have them set as yo would liek them for the day when you grab the camera, turn, point and shoot with the settings otherwise wrong...like you left it in manual from the last shots you took. Something like this may just save the day, by knocking the ISO up a few stops and giving an image you can use.
I'd be just as happy if these cameras had none of this, but since it is there I'd like to know how to use it.
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