How good/bad is Auto ISO on canon?

Started Dec 11, 2013 | Questions
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mistermejia Senior Member • Posts: 3,340
How good/bad is Auto ISO on canon?

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

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Canon EOS 6D
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panoviews
panoviews Regular Member • Posts: 310
Re: How good/bad is Auto ISO on canon?
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RS_RS Senior Member • Posts: 1,730
Re: How good/bad is Auto ISO on canon?

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

Works fine for me on my 5DIII, and I know of no reason to think the 6D would be any different.

24Peter
24Peter Veteran Member • Posts: 3,047
Re: How good/bad is Auto ISO on canon?
2

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

Perhaps I'm missing something since you don't cite a source, but it's not that Auto ISO worked poorly on older Canon DSLR's - it's just that it was quite limited in features/implementation compared for instance to Nikon. (In other words, it did what it was intended to do; the problem is, it wasn't intended by Canon to do as much as it could.)

But.... Canon has upped the functionality of AUTO ISO on it's newer cameras and it works fine. I think there are still a few limitations compared to Nikon (for instance, no EC when using Auto ISO in M mode), but it is no longer a bummer to use Auto ISO on new Canon DSLR's. For instance, Auto ISO is quite useful on my 60D - but no so much on my 5DII since I would really like to use it in M mode when taking stills. (They did add this function to video shooting by a firmware update but inexplicably left it off still photo mode.)

mistermejia OP Senior Member • Posts: 3,340
Re: How good/bad is Auto ISO on canon?

24Peter wrote:

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

Perhaps I'm missing something since you don't cite a source, but it's not that Auto ISO worked poorly on older Canon DSLR's - it's just that it was quite limited in features/implementation compared for instance to Nikon. (In other words, it did what it was intended to do; the problem is, it wasn't intended by Canon to do as much as it could.)

But.... Canon has upped the functionality of AUTO ISO on it's newer cameras and it works fine. I think there are still a few limitations compared to Nikon (for instance, no EC when using Auto ISO in M mode), but it is no longer a bummer to use Auto ISO on new Canon DSLR's. For instance, Auto ISO is quite useful on my 60D - but no so much on my 5DII since I would really like to use it in M mode when taking stills. (They did add this function to video shooting by a firmware update but inexplicably left it off still photo mode.)

Thanks good information.  I understand what you are saying.  My S5 pro behaves the same.  I can't change EC when i am in M  

I will double check this with the 6D next time i am at store.

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Timbukto Senior Member • Posts: 4,618
Keep in mind it also has Exposure Safety Shift

mistermejia wrote:

24Peter wrote:

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

Perhaps I'm missing something since you don't cite a source, but it's not that Auto ISO worked poorly on older Canon DSLR's - it's just that it was quite limited in features/implementation compared for instance to Nikon. (In other words, it did what it was intended to do; the problem is, it wasn't intended by Canon to do as much as it could.)

But.... Canon has upped the functionality of AUTO ISO on it's newer cameras and it works fine. I think there are still a few limitations compared to Nikon (for instance, no EC when using Auto ISO in M mode), but it is no longer a bummer to use Auto ISO on new Canon DSLR's. For instance, Auto ISO is quite useful on my 60D - but no so much on my 5DII since I would really like to use it in M mode when taking stills. (They did add this function to video shooting by a firmware update but inexplicably left it off still photo mode.)

Thanks good information. I understand what you are saying. My S5 pro behaves the same. I can't change EC when i am in M

I will double check this with the 6D next time i am at store.

Meaning upon detection of pretty obvious over or under exposure it will shift either ISO or Aperture/Shutter speed depending on mode, etc.  This is particularly useful for shooting wide open with primes and only having a 1/4k shutter speed if it is too bright it automatically stops down a bit.  Typically a sharper stopped down image with more DOF is the far lesser of two evils compared to a completely blown out image (due to the 1/4k shutter speed limitation).

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Graham Meale
Graham Meale Senior Member • Posts: 1,389
Re: How good/bad is Auto ISO on canon?

It was a bit hit-and-miss on the 5D II, but works well on my 5D III. So I'd be surprised if it didn't work well on the newer 6D.

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Spad16
Spad16 Senior Member • Posts: 1,083
Re: How good/bad is Auto ISO on canon?

It's useful, I have it on all the time (yes I'm lazy). But you need to keep an eye on it, I've found it tends to be rather extreme, it will try to use ISO100 where I wouldn't have. But on the whole it's pretty good.
/Neil

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Marx81
Marx81 Regular Member • Posts: 432
Re: How good/bad is Auto ISO on canon?

It works better on 5D3 than on 5D2 . Now is useful . And so , I guess , should be on 6D .

http://www.flickr.com/photos/marxx/

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Philippe Castagna
Philippe Castagna Regular Member • Posts: 417
Re: How good/bad is Auto ISO on canon?

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

I'm using the 6d since a year now and use auto iso 95% of the time.

it's reliable and especially shooting in really low or moving light, setting the higher iso to 25600 it set automatically the best ratio in between speed and image quality. It's a lot of steps in between 12800 and 25600. Knowing that in this range the iso level could become really critical.

In between 6400 and 12800 it's much less critical as the result is always good within this range.

under 6400 it is no issue anymore due to the high level of details which is kept on every shot.

also select a minimum shutter speed could be convenient and more if you are using a lens without IS or if you are shooting people moving that you want sharp. For ex. I generally set a min speed of 1/60 when I'm using the 40 f/2.8 and I get a really high level of keeper sharp...

cheers

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Peter Kwok
Peter Kwok Senior Member • Posts: 2,272
fast & easy way to change the minimum shutter speed?

Auto ISO is extremely helpful for covering events like church wedding where flash is not allowed. I can quickly go from B&G on stage under bright lights to family members sitting in the dimly lighted pews. I usually shoot Av mode, but keep my eye on the shutter speed and ISO the camera selects. I can influence those settings by changing the f-stop and exposure compensation. I am very satisfied with the results.

I would prefer to shoot auto ISO in M mode. However, the lack of exposure compensation (due to the lack of a 3rd dial) rules that out.

What I want is a fast & easy way to change the minimum shutter speed. I usually shoot 1/60 or higher for candid, 1/30 for pose and 1/8 for still life. Is there a way to put the min shutter speed on My Menu? I can only put the upper level ISO speed settings on My Menu. That forces me to drill down 1 level to make any change.

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Charlie Phillips
Charlie Phillips Contributing Member • Posts: 627
Re: How good/bad is Auto ISO on canon?

Generally pretty good in the newer bodies, very happy with Auto ISO on my IDX & 70D - but I'm really looking forward to the IDX firmware upgrade in January where you will be able to get EC in M with Auto ISO - maybe they might roll this out to other bodies soon too...are you listening Canon???

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Rock and Rollei Contributing Member • Posts: 765
Re: How good/bad is Auto ISO on canon?

Yes, it works well on the 6D - I use it a lot, whereas I never used it on the 5D II.

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24Peter
24Peter Veteran Member • Posts: 3,047
Re: How good/bad is Auto ISO on canon?

Rock and Rollei wrote:

Yes, it works well on the 6D - I use it a lot, whereas I never used it on the 5D II.

I'm jealous. If the 6D had a swivel screen, that - and functioning Auto ISO in M mode - would have been reason enough for me to upgrade.

Brad Evans Contributing Member • Posts: 616
Re: It's the only mode I shoot with

mistermejia wrote:

Hello!

I read a comment that Canon's auto ISO is not very good. How does it behave, specifically on the 6D? I have always owned nikon and never had a canon. What difference will i see?

Thanks!

Since getting my 6D almost a year ago, it's the only mode I shoot when out shooting on the street...

My 5DII had Auto ISO mode, but it was very clumsy in comparison.  With the 6D I can shoot in Aperture Priority, Auto ISO, and specify a minimum shutter speed that's fast enough to capture reasonable motion of people walking on the street (that was missing on the 5DII), in almost any kind of light.

I no longer need to think about ISO and an acceptable shutter speed for most most circumstances. In situations where the light is really low, like in a bar, I'll pick a slower minimum shutter speed so the ISO doesn't get too high.

Try it, you'll like it!

............
Brad
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Pete512
Pete512 Forum Member • Posts: 66
Re: It's the only mode I shoot with

If you want to shoot with Auto ISO, then you are letting the camera decide some part of the exposure calculation.  In that case, I can't see why you still want Manual mode.

Typically, you want to control the Aperture for DOF control or Shutter Speed for movement. So if you use Av or TV, then you have exposure compensation available on the other dial, and still have control over the exposure parameter most important for the situation.

With the high ISO capabilities of the 6D, I have found this to be the preferred mode.  On my 60D, I stay in Manual because I'm not so confident that the lowest ISO possible will be chosen.

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ultimitsu
ultimitsu Veteran Member • Posts: 6,601
Re: It's the only mode I shoot with
1

Pete512 wrote:

If you want to shoot with Auto ISO, then you are letting the camera decide some part of the exposure calculation.

No, you dont. The only thing you can control regarding exposure is Aperture and Shutter Speed. ISO is amplification, not part of exposure.

In that case, I can't see why you still want Manual mode.

Because you can control both Aperture and Shutter Speed.

Typically, you want to control the Aperture for DOF control or Shutter Speed for movement.

Typically, you may want to control both.

On my 60D, I stay in Manual because I'm not so confident that the lowest ISO possible will be chosen.

Why not? if you use Av, you are letting the camera choose the right shutter speed for the luminance level, Why suddenly do you not trust the camera using the same metering system to choose the right amplification level?

ultimitsu
ultimitsu Veteran Member • Posts: 6,601
Re: It's the only mode I shoot with

Brad Evans wrote:

With the 6D I can shoot in Aperture Priority, Auto ISO, and specify a minimum shutter speed that's fast enough to capture reasonable motion of people walking on the street (that was missing on the 5DII), in almost any kind of light.

Can you specify minimum shutter speed on 6D? how do you do that? I thought it is just a pre-programmed ratio of FL.

Hans Kruse Veteran Member • Posts: 3,364
Re: It's the only mode I shoot with

ultimitsu wrote:

Brad Evans wrote:

With the 6D I can shoot in Aperture Priority, Auto ISO, and specify a minimum shutter speed that's fast enough to capture reasonable motion of people walking on the street (that was missing on the 5DII), in almost any kind of light.

Can you specify minimum shutter speed on 6D? how do you do that? I thought it is just a pre-programmed ratio of FL.

The settings are the same as with the 5D III. You can set auto or minimum shutter speed for auto ISO. The maximum minimum shutter speed is 1/250s just like the 5D III.

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rolette Regular Member • Posts: 280
Re: It's the only mode I shoot with

ultimitsu wrote:

Pete512 wrote:

If you want to shoot with Auto ISO, then you are letting the camera decide some part of the exposure calculation.

No, you dont. The only thing you can control regarding exposure is Aperture and Shutter Speed. ISO is amplification, not part of exposure.

What world are you living in where ISO isn't part of the exposure triangle?

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