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exposure compensation in manual mode and auto iso
- Thread starter padang
- Start date
Christian Wagner
Senior Member
I don't totally understand but if you are shooting manual and you find it underexposing by 2 stops, why don't you simply change one of your settings (ap or shutter or iso) to overexpose by 2 stops? I assume you are metering to get a perfect exposure with each shot, do the same thing but add 2. What am I missing?
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Christian Wagner
http://www.lifevicarious.com
Mike Curtis
Senior Member
Just use manual mode and no auto iso if you truly want to have full control. Remember camera meter measures reflected light (thinks everything is 18% grey) not an incident meter so exposure compensation may be needed.
Mike
Mike
Let's say I do a portrait of a still person:
- 1/100s is enough to freeze the action
- f/2.8 gets me both eyes in focus and still good background blur
Christian Wagner
Senior Member
OK, but as the other poster directly stated, and I indirectly stated, shoot M and then change your ISO keeping your Shutter and Ap as you want. Not quite as convenient as you want but if you're shooting M, you should be used to adjusting your settings anyway.
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Christian Wagner
http://www.lifevicarious.com
ho yes, of course I know how to use M mode. But was trying to benefit most from auto iso !
thanks for the help,
why ask the camera? It doesn't know whether you want a high key portrait, it's only concerned with the parameters the engineers programmed in. (One reason I don't have much desire for auto ISO...)
Exposure comp and manual exposure accomplish the same thing, so it's no wonder the Canon engineers saw no reason to implement it. In fact, my mind boggles at the concept of trying EC and ME...even if it did work.
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Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
http://skipm.smugmug.com/
'Living in the heart of a dream, in the Promised Land!'
John Stewart
So what setting, exactly, would you want exposure compensation to change? You are in manual mode. You have full control over all exposure settings yourself. In your example, the only thing bein set automatically is ISO. If it is not being set correctly, then change it manually. There is your exposure compensation.
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-Larry
http://www.pbase.com/lardog
submagination
Senior Member
Look at where the ISO button is on the 5D2:
Just use your finger to hit the button and change it.
With the ISO in the viewfinder, this should be trivial at the very least.
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Website: http://mikebrum.com/
Photoblog: http://submagination.com/
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Just use your finger to hit the button and change it.
With the ISO in the viewfinder, this should be trivial at the very least.
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Website: http://mikebrum.com/
Photoblog: http://submagination.com/
Filckr: http://www.flickr.com/photos/mikebrum/
NickMJr
Veteran Member
What your asking for is can be found in all Nikon bodies. If you want a fully functional and inteligent AutoISO, you can pick up a cheap Nikon D60 that can use AutoISO in Manual mode.
Nick M
NickMJr
Veteran Member
Purchase a Nikon and true AutoISO will be at your disposal.
Nick M
John Sheehy
Forum Pro
EC with auto-ISO in manual exposure mode is mandatory for auto-ISO to work for the photographer. You just set the EC, and the camera chooses the ISO necessary to get the relative exposure bias that you asked for, exactly like you would get in Av- or Tv-priority mode. The ISO simply floats instead of the shutter speed or f-stop.
The bottom line for Canons, and most Nikons, these days, is that with a given absolute sensor exposure, the only RAW trade-off with ISO variation is that higher ISOs clip more easily; they actually add less noise to the image than low ISOs do, up to the highest analog gain.
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John
John Sheehy
Forum Pro
ISO, of course; the thing which is floating, in this context.
Sounds like you shoot statues and landscapes mostly.
Some of us shoot in environments where subjects appear suddenly in totally random illumination over ten stops with windows of opportunity measured in milliseconds.
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John
Something out of my mind..... I use the 5Dii for only 1hour, and already there is a critical miss identified. Maybe they have too many MBAs to create their product spec..
ISO, of course; the thing which is floating, in this context.
Sounds like you shoot statues and landscapes mostly.
Some of us shoot in environments where subjects appear suddenly in
totally random illumination over ten stops with windows of
opportunity measured in milliseconds.
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John
No, I don't shoot statues mostly. But thanks for the smarta$$ comment though. That was helpful.
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-Larry
http://www.pbase.com/lardog
I'm thinking it was more in response to customer grumping than actual utility. Otherwise, they'd have made it just like Nikon's version.
As far as I'm concerned, there's a whole list of things I'd like for Canon to have implemented before auto ISO, like mirror lock up in the menu instead of buried in the custom functions or mayby an articulated LCD so live view would be perfectly useable, instead of sort of nice.
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Skip M
http://www.shadowcatcherimagery.com
http://www.pbase.com/skipm
http://skipm.smugmug.com/
'Living in the heart of a dream, in the Promised Land!'
John Stewart
John Sheehy
Forum Pro
Well, you know, I consider comments which imply that everyone has time to perfect exposure to be such comments.
I can't tell you how many times I missed a shot because the camera can't do the simplest things I need it to do, because of the arrogance of Canon's firmware department.
Camera gain is not a creative parameter. It is an unfortunate artifact of camera technology.
Setting the f-stop, shutter speed, choosing the timing and vantage point of composition, focus, etc are creative parameters.
The fact is, for wildlife photography, f-stop (about 2/3 stops down from open) and shutter speed (
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John
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