ISO Zero on D100

[michael_spencer3]

Darrell Irwin posted a question about "Blank Images with D100" on jul

17, 2005; 11:26 p.m. He did not get much help in diagnosing his

problem. I have a different symptom, but maybe there is some common

connection. Any suggestions would be welcome.

 

A few days ago I was taking some lotus pictures at the National

Aquatic Gargens in Washington, DC. It was a bright, sunny morning

with some clouds moving in from time to time. In the following image

I was trying to capture the rather brilliantly lit lotus blossom. I

was using an 80-400 VR lens at F16 with speed at 1/200 seconds. I

generally set the ISO to 200 and set Auto ISO = off because has

tripped me up in the past. The focal length was set at 165mm. In

fact, some images just a few seconds earlier were correctly exposed at

1/30 with ISO=200. I have left the EXIF data with this reduced size

image so maybe this will give someone a clue as to what is happening.

If you scroll down to ISO you will see that the value is set to

"zero". Also, some other nearby data items seem corrupted.

 

There were a string of four such images, followed by a bunch that were

OK, then a single ISO=0 image also dark, more good ones, another

string of four dark ones, and then the camera has been operating

normally since.

 

Mike Spencer<div></div>

[erickpro]

Think of it on the bright side.

 

You probably don't get grain using an ISO of 0.

 

:D

 

smile.

[jay_blocksom]

<BLOCKQUOTE><I><B>Michael Spencer, jul 19, 2005; 10:40 p.m.</B>

<br>

Darrell Irwin posted a question about "Blank Images with D100" on jul 17, 2005; 11:26 p.m. He did not get much help in diagnosing his problem. I have a different symptom, but maybe there is some common connection. Any suggestions would be welcome.

<BLOCKQUOTE>

[snip]

</BLOCKQUOTE>

I have left the EXIF data with this reduced size image so maybe this will give someone a clue as to what is happening. If you scroll down to ISO you will see that the value is set to "zero". Also, some other nearby data items seem corrupted.

<br>

<br>

There were a string of four such images, followed by a bunch that were OK, then a single ISO=0 image also dark, more good ones, another string of four dark ones, and then the camera has been operating normally since.

</I></BLOCKQUOTE>

 

I read the earlier threads you refer to; but having nothing constructive to offer, didn't comment.  However, I now think you might really be onto something with this "ISO 0" thing.  That is NOT normal, and it definitely sounds like an intermittent bug in the camera.  Further, given that it has (apparently) affected at least two different D100s, it's probably not an isolated fluke.  Unfortunately, I also suspect it will take Nikon Service/Support to further diagnose and/or fix it.  But before you "go there", just to make sure you've looked under every rock (and to shortcut Nikon's possible "pass the buck" answer), try using a different CF card for awhile, and see if that changes the results any.  Meanwhile, save those images, and document *everything*.

<br>

<br>

Darrell...  This advice applies to you, too.

<br>

<br>

[erickpro]

Have you tried reformatting your CF card?

 

He also gave a good point, try a different card and see if it happens again.

 

I just hope this doesn't develop to a bigger problem.

 

Cheers.