D60 Exposure Glitch!

CW in Japan · Mar 30, 2002

Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence on metering: In bright light metering is okay, in dark situations it results in underexposure because the red illumination is metered too!

To verify this this: Turn CF14 OFF and metering at long exposure is correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can see it in the viewfinder because the metering value changes after the red light lighted up for confirming autofocus."

Anthony · Mar 30, 2002

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Very interesting.
Yes, I just confirmed this.
Here are two photos.
First one taken at 1/30 2.8 with light ON
Second one taken 1/25 with the light OFF

RichW · Mar 30, 2002

This has been mentiioned before. It does seem to influence the exposure. You could always lock exposure in the the * button or turn off the lights. I wonder if the problem exists on other cameras with that feature.

Rich

Rich

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Thom · Mar 30, 2002

just checked both out and the A2 and the D60 (without superimposed focus point) match meter readings. With the D60 focus point lit, the camera underexposes around 1/2 to one stop, depending on how long the exposure is. Yes, the workaround is to exposure lock first with .

Bummer!

lloyd t. · Mar 30, 2002

It would be really nice if we could get a fix to this problem.

You really don't want to have to be in the habit of exposure locking on all photos in low light situation.

lloyd

Thom said:
just checked both out and the A2 and the D60 (without superimposed
focus point) match meter readings. With the D60 focus point lit,
the camera underexposes around 1/2 to one stop, depending on how
long the exposure is. Yes, the workaround is to exposure lock
first with .

Bummer!

OhioMike · Mar 30, 2002

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

--Mike

RichW · Mar 30, 2002

The best solution is to use Cfn 02 and set to 1. This switches focusing to the * button giving much more control over the focusing operation. It allows manual focusing (on lenses that allow that) in AF mode and gives more precise control over the focusing. Exposure lock is now on the front button and any problem with the focus light affecting exposure is now eliminated. Try it for a while, you might like it.

Rich

ltabb said:
You really don't want to have to be in the habit of exposure
locking on all photos in low light situation.

lloyd

Thom said:

just checked both out and the A2 and the D60 (without superimposed
focus point) match meter readings. With the D60 focus point lit,
the camera underexposes around 1/2 to one stop, depending on how
long the exposure is. Yes, the workaround is to exposure lock
first with .

Bummer!

Click to expand...

Anthony · Mar 30, 2002

I wouldn't lose too much sleep over this.

This obviously is not a problem when using flash.
You can either compensate in the camera, or compensate in the twain software.

Or better yet...if you're working under those conditions for an extended period of time....turn the feature off.

We lived this long without it.

I'm sure Canon will hear about this one, and come up with some kind of firmware fix.

lloyd t. · Mar 30, 2002

Thanks rich.

RichW said:
Rich

ltabb said:

You really don't want to have to be in the habit of exposure
locking on all photos in low light situation.

lloyd

Thom said:

just checked both out and the A2 and the D60 (without superimposed
focus point) match meter readings. With the D60 focus point lit,
the camera underexposes around 1/2 to one stop, depending on how
long the exposure is. Yes, the workaround is to exposure lock
first with .

Bummer!

Click to expand...

Click to expand...

Timothy Schaffer · Mar 30, 2002

I thought the problem was the illuminated focus points them selves, not the AF assist light? Am I mistaken?

RichW said:
Rich

ltabb said:

You really don't want to have to be in the habit of exposure
locking on all photos in low light situation.

lloyd

Thom said:

just checked both out and the A2 and the D60 (without superimposed
focus point) match meter readings. With the D60 focus point lit,
the camera underexposes around 1/2 to one stop, depending on how
long the exposure is. Yes, the workaround is to exposure lock
first with .

Bummer!

Click to expand...

Click to expand...

Thom · Mar 30, 2002

Maybe it's YOUR best solution, but not everyones. Actually, if I wanted to learn to like the technique I could have done it ten years ago with my EOS A2, but I don't like it. It also eliminates Flash Exposure Lock capability in low light, the exact time that this is going to be a problem, eh?

Maybe a little better QA/design evaluatation would be the more prudent solution and leave us to choose what options we prefer. You know, the one's the D60 is supposed to offer for all that money?

JRG-Imaging · Mar 30, 2002

i just tested this by actually shooting picts. should try it.

first i shot as i've had the camera since i opened it. i did notice the shutter speed change (am in Av mode). the shot was still well exposed.

used the below outlined method with Cfn. 02. focused with the * button, then pressed shutter release to get exposure and fired. longer shutter speed, and an overexposed image (highlights blown out, serious movement of the histogram)

shrug.

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Thom · Mar 30, 2002

the light meter includes the illumintation of the red focus point in measuring ambient light exposure, thus underexposing the image.

David Lozoya · Mar 31, 2002

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Why not just turn off the feature when shooting for a long exposure?--Home page - http://home.attbi.com/~lozoyad

AwakeAtTheWheel · Mar 31, 2002

David Lozoya said:
Why not just turn off the feature when shooting for a long exposure?

yes, sure, but that's not the point. this is a highly computerized piece of equipment; and, as such, there is plenty of room in the software to engineer automated adjustments which correct for problems in the camera's systems. Granted, it takes a super-intelligent forum (like this one where we congregate on dpreview) to ferret out these tiny glitches; but, nevertheless, Canon should attempt to correct this, especially if it's feasible in the firmware. I hope they're reading this thread!--Sandy Santrawww.pbase.com/santra

RichW · Mar 31, 2002

It does sound like an easy fix with a firmware update. The real question is why Canon did not do this originally? Surely they must of noticed it. Could be that they didn't consider it important enough.

Rich

Sandy Santra said:
AwakeAtTheWheel said:

Why not just turn off the feature when shooting for a long exposure?

Click to expand...

yes, sure, but that's not the point. this is a highly computerized
piece of equipment; and, as such, there is plenty of room in the
software to engineer automated adjustments which correct for
problems in the camera's systems. Granted, it takes a
super-intelligent forum (like this one where we congregate on
dpreview) to ferret out these tiny glitches; but, nevertheless,
Canon should attempt to correct this, especially if it's feasible
in the firmware. I hope they're reading this thread!
--
Sandy Santra
http://www.pbase.com/santra

Chris Dallas · Mar 31, 2002

You are absolutely correct! Just tried it & have the same problem..

Darn..

Chris

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Chris Dallas · Mar 31, 2002

Thanks Rich..

this combo works perfect! Plus, it is much better control for focusing & exposure locks this way.

Great find Rich!

Cheers
Chris

RichW said:
Rich

ltabb said:

You really don't want to have to be in the habit of exposure
locking on all photos in low light situation.

lloyd

Thom said:

just checked both out and the A2 and the D60 (without superimposed
focus point) match meter readings. With the D60 focus point lit,
the camera underexposes around 1/2 to one stop, depending on how
long the exposure is. Yes, the workaround is to exposure lock
first with .

Bummer!

Click to expand...

Click to expand...

Chris Dallas · Apr 1, 2002

This problem also happens outside in daylight! Try it & see, with the red flashing AF points on the pictures come out dimmer than without.

Richie Adler said:
Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Norfolk · Apr 5, 2002

Sorry to be late to the party, but my D60 just arrived. I'd seen this post a few days ago, and now that I have the manual, thought I'd throw in another idea.

On page 82, Canon suggests using the eyepiece cover to block off the viewfinder when you're NOT holding the camera up to your eye during the exposure -- as, when using a tripod, etc. If this step is not followed, "stray light can enter the eyepiece and affect the exposure."

This may explain some of the exposure problems posted here. If you're taking long exposures, chances are you're using a tripod, and may be leaving the viewfinder unblocked.

Unfortunately, I cannot test this idea myself. I've got the D60 -- but don't have any lenses yet. I ordered those from another dealer, and they should be arriving early next week. That explains why I have time to actually read the manual.

Steve

------

Chris Dallas said:
Richie Adler said:

Has anybody else experienced the following:

"That seems to be a problem of all D60s:

If CF14 Red Flashing of AF point in ON the red light has influence
on metering: In bright light metering is okay, in dark situations
it results in underexposure because the red illumination is metered
too!

To verify this this: Turn CF14 OFF and metering at long exposure is
correct. The influence begins at 1/30 sec f 2,8 ISO 200 and you can
see it in the viewfinder because the metering value changes after
the red light lighted up for confirming autofocus."

Click to expand...

D60 Exposure Glitch!

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