What I thoughtwas an easy questiob but...

RalphLambrecht · Apr 1, 2015

it has my brain in knots for days; assume you are taking several photographs of the same scene at fixed aperture and shutter speed settings but vary theIso setting on your camera. Will the images become lighter darker orsyay the same with increasing ISO?

Doyle Thomas · Apr 2, 2015

try it, as the ISO increases the image will get brighter.

RalphLambrecht · Apr 2, 2015

DOYLE THOMAS said:
try it, as the ISO increases the image will get brighter.

that's exactly what I predicted too,comparing it to prints from higher film speeds, but they hardly changed at all;wondering shy?

Paul-H · Apr 2, 2015

Hi

Could it be that in manual mode the ISO setting is being over ridden by a hidden auto ISO setting, so that the camera forces you to have what it considerer's to be a correct exposure, some do work like that.

What camera are you using

Doyle Thomas · Apr 2, 2015

Paul-H said:
Hi

Could it be that in manual mode the ISO setting is being over ridden by a hidden auto ISO setting, so that the camera forces you to have what it considerer's to be a correct exposure, some do work like that.

What camera are you using

if this were the case you should see the stop and or spd change as the ISO changes

Paul-H · Apr 2, 2015

Or would it, the feature is often used so that the photographer can select a specific Aperture and shutter speed combination and adjusts the ISO to give the correct exposure with the manual settings.

jeffreyg · Apr 2, 2015

As I remember you are using a Nikon DSLR. Check to see if the exposure compensation has changed. I have noticed this occurring on mine at times even though I did not making any changes to settings. These cameras seem to think for themselves.

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RalphLambrecht · Apr 2, 2015

jeffreyg said:
As I remember you are using a Nikon DSLR. Check to see if the exposure compensation has changed. I have noticed this occurring on mine at times even though I did not making any changes to settings. These cameras seem to think for themselves.

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I noticed that before once too but not this time;it's turned off to 0.0

Bill Burk · Apr 4, 2015

How about the histogram? Is it moving left and right without exceeding the "straight line"? Are you shooting in RAW mode?

RalphLambrecht · Apr 5, 2015

Bill Burk said:
How about the histogram? Is it moving left and right without exceeding the "straight line"? Are you shooting in RAW mode?

NO CLEAR INDICATION FROM HISTOGRAM.Yes, RAWwhat else would one shoot?

MartinCrabtree · Apr 5, 2015

Is Auto ISO on? If so minimum and maximum shutter speeds may be coming into play regardless of settings chosen.

OzJohn · Apr 6, 2015

I first saw this thread soon after it was posted and, looking at the date, assumed it was an April Fools Day gag and did not reply. Most people with a bit of photography experience know that there are only three exposure variables under constant lighting and they are ISO, shutter speed and aperture. Therein lies the answer to the original question "Will the images become lighter darker orsyay (sic) the same with increasing ISO?" Answer: "The images will become lighter". This was stated by Doyle Thomas in the very first reply. OzJohn

RalphLambrecht · Apr 7, 2015

Paul-H said:
Hi

Could it be that in manual mode the ISO setting is being over ridden by a hidden auto ISO setting, so that the camera forces you to have what it considerer's to be a correct exposure, some do work like that.

What camera are you using

Nikon D800

Chan Tran · Apr 7, 2015

ralphlambrecht said:
that's exactly what I predicted too,comparing it to prints from higher film speeds, but they hardly changed at all;wondering shy?

Wow Raplh! You ran into quite a few strange problems with digital. It seems that film is a whole lot more predictable doesn't it?

Doyle Thomas · Apr 7, 2015

OzJohn said:
I first saw this thread soon after it was posted and, looking at the date, assumed it was an April Fools Day gag and did not reply. Most people with a bit of photography experience know that there are only three exposure variables under constant lighting and they are ISO, shutter speed and aperture. Therein lies the answer to the original question "Will the images become lighter darker orsyay (sic) the same with increasing ISO?" Answer: "The images will become lighter". This was stated by Doyle Thomas in the very first reply. OzJohn

yes, this has gone on too long and over complicated. one thing I would like to see in digital cameras is a reset to defaults on power up. in that way, you would always know where you are starting from and could do as you wish from there. my camera will do this but you have to hold several buttons down while power up and it is a pain.

RalphLambrecht · Apr 8, 2015

Chan Tran said:
Wow Raplh! You ran into quite a few strange problems with digital. It seems that film is a whole lot more predictable doesn't it?

it really is for me anyway

What I thoughtwas an easy questiob but...

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