Jump to content

Welcome to NikonForums.com
Register now to gain access to all of our features. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more. If you already have an account, login here - otherwise create an account for free today!
Photo

What is going on with ISO?

what going

  • Please log in to reply
10 replies to this topic

#1
Tony

Tony

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 2,517 posts
  • Country Flag
  • LocationBeaverton, Oregon

Site Supporter

Today was a very bright and windy experience out there in the cold, cruel world.

 

Using my Nikon D200 with AF Nikkor 55~200mm, DX, ED, VR Lens.  I initially set SS to 1/60s with F/11.  The first image 

 

turned out a little overexposed so I decided to speed up the SS to 1/125s and set lens to F/18.  Not even an iota of a 

 

difference in exposure.  I didn't give a thought to ISO because I was secure in knowing that it was not on AUTO.

 

However, I realized after uploading that the ISO had gone from 100 to 1600, and some images to ISO 1000.

 

How is it that the manual setting was overridden by the system?  I attempted to find something on it in the D200 Operating

 

Manual, but to no avail.

 

Thanks for any and all assistance.

 

TT

 

 



#2
Merco_61

Merco_61

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 10,589 posts
  • Country Flag
  • LocationUppsala, Sweden

Site Supporter

You must have activated AutoISO inadvertently as there is no way the camera can change ISO on its own if you have set a single ISO.



#3
Bengan

Bengan

    Forum Veteran

  • Forum Member
  • PipPipPipPipPipPipPip
  • 605 posts
  • Country Flag
  • LocationStockholm

Site Supporter

One thing I noticed about Nikon is that I set the ISO with rear wheel and if the camera is in auto ISO I also have to turn that off with the front wheel. I'm used to Pentax that reacts differently. Here I just have to set a specific ISO to simultaneously deactivate auto ISO.



#4
TBonz

TBonz

    Sportz Guy

  • Forum Member
  • PipPipPipPipPipPipPipPip
  • 3,652 posts
  • Country Flag
  • LocationOn A Field Somewhere...

Site Supporter

I agree with Peter - AutoISO doesn't turn on without the user.  Perhaps you setup a custom button to turn it on or something like that.



#5
Nikon Shooter

Nikon Shooter

    Nikonian

  • Forum Member
  • PipPipPipPipPipPipPipPip
  • 4,041 posts
  • Country Flag
  • Location: French Canadian living in Central Europe

I agree with Peter…


Me too…

btw, Auto ISO is a better strategy that I
use everywhere, anytime except in studio,



#6
Tony

Tony

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 2,517 posts
  • Country Flag
  • LocationBeaverton, Oregon

Site Supporter

Okay, I checked the Auto ISO in both D200s and it was set to Auto ISO.  Which raises another question.  Since the Auto ISO was set to activate, why were 

 

my exposures off?  I mean, since it was a bright, sunny day, why would the camera create an overexposed image/s?

 

Thnx,

 

tt



#7
Nikon Shooter

Nikon Shooter

    Nikonian

  • Forum Member
  • PipPipPipPipPipPipPipPip
  • 4,041 posts
  • Country Flag
  • Location: French Canadian living in Central Europe


'has to do with the 18% reflectance all light meters are set up to
to estimate scenes.
 

Combine the Auto ISO with the EV +/- and the confirmation by a
look at the histogram (your best friend ever!) and you're done.



#8
Tony

Tony

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 2,517 posts
  • Country Flag
  • LocationBeaverton, Oregon

Site Supporter

'has to do with the 18% reflectance all light meters are set up to
to estimate scenes.
 

Combine the Auto ISO with the EV +/- and the confirmation by a
look at the histogram (your best friend ever!) and you're done.

Many thanks NS.  I believe I will just leave the Auto ISO, OFF.  :)) TT



#9
Merco_61

Merco_61

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 10,589 posts
  • Country Flag
  • LocationUppsala, Sweden

Site Supporter

Why? Isn't that a bit like cutting your nose off to spite your face?

AutoISO is very useful, you just need to learn how your light meter works in diffrent situations.

 

A light meter is calibrated to render everything medium grey. If you have a light or dark background, you will have to compensate for that as the camera body can't think for you or read your mind, thankfully.



#10
Nikon Shooter

Nikon Shooter

    Nikonian

  • Forum Member
  • PipPipPipPipPipPipPipPip
  • 4,041 posts
  • Country Flag
  • Location: French Canadian living in Central Europe

The point and shoot camera is the best when it comes to shooting
strategy: point and shoot… simply. The problem is that they are the
worst in terms of predictability, it has the control… not you!

To a student asking me: "why do you need such sophisticated came-
ras?" I answered: "to take control of the point and shoot cool strategy
in image hunting.

Auto ISO is an important element in the said approach. :P



#11
Tony

Tony

    Nikonian

  • Premium Member
  • PipPipPipPipPipPipPipPip
  • 2,517 posts
  • Country Flag
  • LocationBeaverton, Oregon

Site Supporter

Why? Isn't that a bit like cutting your nose off to spite your face?

AutoISO is very useful, you just need to learn how your light meter works in diffrent situations.

 

A light meter is calibrated to render everything medium grey. If you have a light or dark background, you will have to compensate for that as the camera body can't think for you or read your mind, thankfully.

 

I understand what you are saying.  Therefore, I will work with it for a while.  tt







Also tagged with one or more of these keywords: what, going