Manual over-riding Auto ISO on D90

[psychobiologist]

Thanks!! This is exactly what I needed to find out. So it only sets the minimum range... hmmm... I wonder why they made it this way...

I thought that the ISO + Dial was to override the Auto ISO without going into the menu to turn it off... isn't it more useful this way? :dunno:

actually i'm not too sure whether you can set the Func button to turn on/off the auto ISO when depressed.. i need to check.

if it can be set that way, then you can toggle around with it

 

[blue_quartz]

actually i'm not too sure whether you can set the Func button to turn on/off the auto ISO when depressed.. i need to check.

if it can be set that way, then you can toggle around with it

Set Func button to link to the top item in My Menu, and configure Auto ISO adjustment to be the top item lor...

 

[mojoe]

i am not sure i get what you are trying to achieve. are you on Aperture Priority mode? there are 3 settings for Auto ISO; min ISO, max ISO and min shutter-speed.

let's say the min ISO = 200; max ISO = 1600 and min shutter speed = 1/50.

if you are shooting indoor and the ISO shows 1600, it means that, at your chosen aperture, the calculated shutter speed is slower than 1/50 hence the ISO was raised all the way to 1600.

if you want the ISO to be lower (ie less than 1600), the first thing you should do is increase the aperture to the max. hopefully, this will increase the camera shutter speed to faster than 1/50 and your ISO will remain at 200.

if your aperture is ALREADY at the max, the only other thing you can do is to reduce the minimum shutter speed setting but here you run the risk of photo blur

the auto-ISO feature is one of the nicest features of Nikon cameras which Canon does not have. it's very useful if you learn to use it properly. i can't think of any reason to turn it off. however, sometimes, you may need to adjust one of the 3 settings depending on the situation.

the only restriction of Auto-ISO (on the D90/D300 but NOT the D700/D3) is that the min shutter speed cannot be faster than 1/250 (if i remeber correctly). there is a work-around this by using Shutter Priority instead.

hope the above helps.

I'm on P mode most of the time... There's no min ISO for D90 right? I only have max ISO and min shutter speed.

My needs are not so complicated actually and I rather keep it as Auto ISO as well ;p

I thought I could set my own ISO even with Auto ISO on (whether higher or lower than the Max ISO in Auto ISO) by pressing the ISO button and main dial. But from here, I realised I can't... the adjustment I made with the ISO button and main dial is just to set the min ISO. I didn't know that as I thought I was "overriding" the Auto ISO.

 

[surefire]

I'm on P mode most of the time... There's no min ISO for D90 right? I only have max ISO and min shutter speed.

My needs are not so complicated actually and I rather keep it as Auto ISO as well ;p

I thought I could set my own ISO even with Auto ISO on (whether higher or lower than the Max ISO in Auto ISO) by pressing the ISO button and main dial. But from here, I realised I can't... the adjustment I made with the ISO button and main dial is just to set the min ISO. I didn't know that as I thought I was "overriding" the Auto ISO.

the D90 works the same as the D300 for Auto-ISO. the min ISO is what you set on the Auto-ISO menu page. this min ISO can thereafter be easily adjusted using the ISO button+main dial instead of going through the menu.

i hardly use the P mode. with the A-mode, i find it easier to control the Auto-ISO by changing the aperture size

 

[mojoe]

the D90 works the same as the D300 for Auto-ISO. the min ISO is what you set on the Auto-ISO menu page. this min ISO can thereafter be easily adjusted using the ISO button+main dial instead of going through the menu.

i hardly use the P mode. with the A-mode, i find it easier to control the Auto-ISO by changing the aperture size

Will take note.. thanks for the tip!