Canon 40D and ISO 100/3200

munge

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munge

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Can't seem to get ISO 100 or 3200/H on my camera. Only had it for a few weeks and not had much time to really play with it until now, but for the life of can't find any way of accessing the above ISOs.

Have turned on the expanded ISO range which should make ISO 3200/H available in creative modes, but it isn't there and can't get ISO 100 whatever I do.

Just goes Auto-200------1600 then nothing else.

Any thoughts? Would like to have the ability to have ISO 100 and 3200, so if anyone can point out what completely stupid mistake I'm making, I would be grateful.

It's not even like I'm a camera noob!
 
Maybe a long shot since my experience goes as far as the 450d with digital SLRs but is there a chance that there is a setting such as auto lighting optimizer or similar is enabled and results in the 100 ISO to be unavailable? I can't remember which options causes this but it does this on the 450d.

[edit]I think the option I am referring to is the highlight optimizer.

[mega double edit batman] that should be highlight tone priority, right? more info here
 
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Check to see if you have highlight tone priority enabled, it can't be used in conjunction with iso 100/3200.
 
Considering the above ^^, is there actually an advantage with ISO 100? Seems like it is a fake mode that will reduce the exposure by a stop but the noise level will be the same
 
Okay, so I feel like a muppet. Didn't realise I'd turned on the Highlight Priority which as Lightbulb and fiNker pointed out does limit the ISO range. Quite why it can't have the ISOs available but just not use the Highlight Priority on them and only apply it if you change to ISO 200-1600, only Canon knows.

Impression I had was that Highlight Priority was only really of use in JPEGs - anyone disagree? Am feeling that I'm probably better turning it off if using RAW...
 
D.P. said:
Considering the above ^^, is there actually an advantage with ISO 100? Seems like it is a fake mode that will reduce the exposure by a stop but the noise level will be the same
Click to expand...

Yes there is an advantage.

ISO 100 is the Canons Native ISO, meaning it has the best DR (Dynamic range) and lowest noise. As you move away from this they both decrease.

As for the Highlight Priority, I shoot in raw and have never really noticed a diff, and even then RAW gives you the ability to PP to a better standard.

One setting I don't understand however is why you have to enable ISO3200, why can't it just be there all the time :confused::confused:

Oh well :)
 
Concorde Rules said:
One setting I don't understand however is why you have to enable ISO3200, why can't it just be there all the time :confused::confused:

Oh well :)
Click to expand...

because its the highest ISO setting and in many cases will produce images not deemed suitible for photographs. Its a sort of precaution to stop the photographer leaving it set to anything higher than 1600.

I have fell victim to leaving it on 3200 when I wished I had not and bined all the images.
Of course you can still easily leave it on 3200 if you have the option on but hey thats why.
 
munge said:
Impression I had was that Highlight Priority was only really of use in JPEGs - anyone disagree? Am feeling that I'm probably better turning it off if using RAW...
Click to expand...

Highlight tone priority is useful for wedding shooters, (bright white dresses in dark churches etc) and is best used in Raw.. however HTP does increase overall noise quite significantly..
 
V-Spec said:
Highlight tone priority is useful for wedding shooters, (bright white dresses in dark churches etc) and is best used in Raw.. however HTP does increase overall noise quite significantly..
Click to expand...

Is it not something that can (effectively and better) be added in Photoshop? After all, it's not doing anything extra with the light coming into the lens, surely only the way the camera processes the data from the CMOS?
 
munge said:
Is it not something that can (effectively and better) be added in Photoshop? After all, it's not doing anything extra with the light coming into the lens, surely only the way the camera processes the data from the CMOS?
Click to expand...

You can recover the highlights using LR/Aperture etc, but HTP actually preserves the highlight detail, which is the critical factor.

If you take a shot of something with pure white and the sun is hitting it, normal overexposure will normally kill all highlight detail, you can make it darker or recover it, but if the levels are clipped at 255/255/255 there IS no actual detail.

HTP, simply *does things* in the camera, to ensure that more highlight detail is preserved, you'll find that highlights are easier to recover to a certain extent - although it only does so much, and at the expense of added noise. It is a good feature, but I wouldn't use it all the time.
 
D.P. said:
Considering the above ^^, is there actually an advantage with ISO 100? Seems like it is a fake mode that will reduce the exposure by a stop but the noise level will be the same
Click to expand...

Try taking a longer exposure shot in daylight at ISO400 ;)
 
Concorde Rules said:
Yes there is an advantage.

ISO 100 is the Canons Native ISO, meaning it has the best DR (Dynamic range) and lowest noise. As you move away from this they both decrease.

As for the Highlight Priority, I shoot in raw and have never really noticed a diff, and even then RAW gives you the ability to PP to a better standard.

One setting I don't understand however is why you have to enable ISO3200, why can't it just be there all the time :confused::confused:

Oh well :)
Click to expand...

I'm fairly sure that ISO 100 isn't native, just like ISO 3200 isn't actually ISO 3200 it's just ISO 1600 pushed in software.
 
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