ISO question

[lynweber]

Ok so I have found recently that when shooting my ISO isnt where I set it. I dont understand why or how it changes. So I'm hoping someone can help me understand why it changes itself from my preset of 200?

Background example

I use the D5000 and was shooting in Shutter mode over the weekend (i have noticed this before but let it go FYI) ok so I had my shutter at 1/125 and ISO set at 200 for example when I uploaded my pictures I notice that the EXIF said it was ISO of 800? I dont understand how it changed or what I'm doing wrong for it to turn out that way. Any ideas?
Also my exposure changes as well. I have looked though my camera and tried to figure out why my exposure adjust itself as well depending on situation. Is this just something Nikon does or what should I do differently. I have my camera here with me to check things as question my arise.

I hope I have made this clear but I'm just as confused as probably you may be.

[SandeeWig]

Well, I don't use a Nikon so cannot answer your question about exposure. However, with regard to the ISO issue...

If you are shooting in Tv (shutter priority), then YOU control the SS, the CAMERA controls the aperture and ISO in an effort to get proper exposure. Same thing would happen in Av; you'd control aperture, and camera would control ISO and SS.

The only way to make your ISO stay where you set it is to shoot in full manual, and adjust the SS and Aperture manually as well.

Hope that helps.

[lynweber]

I will try that I dont know why I didnt try that anyway. I get a little scared shooting in manual mode but I like that shutter and Aperture its just a matter of putting them together I suppose.

[RLucas]

There should be an option in your shooting menu to turn the Auto ISO off. It may be in the deep menu that you have to turn on manually as well. Another one of the funny Nikon quirks.

[lynweber]

Originally Posted by RLucas

There should be an option in your shooting menu to turn the Auto ISO off. It may be in the deep menu that you have to turn on manually as well. Another one of the funny Nikon quirks.

How do i find that? Any suggestions?

[RLucas]

Your shooting menu should look like a little picture of a camera on the left side of the LCD display on the back. If you go in to that menu, you should be able to scroll down until you see an option that says ISO, or similar. If you enter there, you should be able to toggle it on/off with the arrow pad.

[lynweber]

Originally Posted by RLucas

Your shooting menu should look like a little picture of a camera on the left side of the LCD display on the back. If you go in to that menu, you should be able to scroll down until you see an option that says ISO, or similar. If you enter there, you should be able to toggle it on/off with the arrow pad.

I have something that says ISO sensitivity off or on?

[scootermcq]

I think that's it. On mine it is labeled "ISO auto sensitivity"

[inkista]

Shooting menu:


ISO Sensitivity Settings -> ISO Sensitivity Auto Control -> On/Off.

Alternatively, you could leave it On, and set the Maximum ISO you're happy with the camera pushing to in an auto mode.