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Digital Rebel XT underexposure

 
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getnews1

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Since: Jun 06, 2004
Posts: 646



(Msg. 1) Posted: Sun Mar 27, 2005 12:46 pm
Post subject: Digital Rebel XT underexposure
Archived from groups: rec>photo>digital>slr-systems (more info?)

Quick report on my DR XT and underexposure, particularly when using flash.

I'm still a newbie when it comes to metering amongst other things. It seems
the DR XT is still up to a stop underexposed without flash, and much more
underexposed when using the built-in flash.

I took some shots last night while cooking and with no exposure or flash
exposure compensation the photos looked dark and there were no bits in more
than the right third of the histogram. Bumping up FEC by a full stop moved
the histogram to the right considerably but the photos were still
underexposed.

What's the best set of shots to determine how far off the flash metering is?
I was in the kitchen with a few 100 watt bulbs and a lot of white paint.
But then I tested on a bookshelf with mostly dark books in a dim dining room
with the same results.

Is anybody else seeing this with their XTs?

Thanks,
Greg

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Slack

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Since: Mar 07, 2005
Posts: 13



(Msg. 2) Posted: Sun Mar 27, 2005 1:02 pm
Post subject: Re: Digital Rebel XT underexposure [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

G.T. wrote:
 > Quick report on my DR XT and underexposure, particularly when using flash.
 >
 > I'm still a newbie when it comes to metering amongst other things. It seems
 > the DR XT is still up to a stop underexposed without flash, and much more
 > underexposed when using the built-in flash.
 >
 > I took some shots last night while cooking and with no exposure or flash
 > exposure compensation the photos looked dark and there were no bits in more
 > than the right third of the histogram. Bumping up FEC by a full stop moved
 > the histogram to the right considerably but the photos were still
 > underexposed.
 >
 > What's the best set of shots to determine how far off the flash metering is?
 > I was in the kitchen with a few 100 watt bulbs and a lot of white paint.
 > But then I tested on a bookshelf with mostly dark books in a dim dining room
 > with the same results.
 >
 > Is anybody else seeing this with their XTs?
 >
 > Thanks,
 > Greg
 >
 >
I was just doing some experiments last night and this morning; came to
the same conclusion as you. I guess it's better than being consistently
over exposed.
--
Slack<!-- ~MESSAGE_AFTER~ -->

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unt

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Since: Dec 14, 2004
Posts: 93



(Msg. 3) Posted: Sun Mar 27, 2005 5:50 pm
Post subject: Re: Digital Rebel XT underexposure [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

 > Quick report on my DR XT and underexposure, particularly when using flash.
 >
 > I'm still a newbie when it comes to metering amongst other things. It
seems
 > the DR XT is still up to a stop underexposed without flash, and much more
 > underexposed when using the built-in flash.
 >
 > I took some shots last night while cooking and with no exposure or flash
 > exposure compensation the photos looked dark and there were no bits in
more
 > than the right third of the histogram. Bumping up FEC by a full stop
moved
 > the histogram to the right considerably but the photos were still
 > underexposed.
 >
 > What's the best set of shots to determine how far off the flash metering
is?
 > I was in the kitchen with a few 100 watt bulbs and a lot of white paint.
 > But then I tested on a bookshelf with mostly dark books in a dim dining
room
 > with the same results.
 >
 > Is anybody else seeing this with their XTs?

I'm certainly not - it's VERY rare for me to get an over- or under-exposed
image with my D350 - unless it's my fault.

In fact, it even makes it harder for me to make a mistake. For indoor
shots, I find myself getting lazy and doing things like setting it to
"manual", and choosing a shutter/aperture value that would normally be very
underexposed, and letting my Sigma flash take care of the rest - as the TTL
metering shuts it off when it finds there's been enough light, exposure is
*remarkably* good that way.

.. With my first D300, I had severe underexposures with the external flash,
but not with on-board flash. I tried various flashes from Sigma and Canon,
all with the same results. However, the flashes worked fine on other
D300's. I sent it back, and waited and bought the D350, which works
wonderfully. However, because that D300 underexposed consistently where
others would not, I strongly suspect that it was defective, and although I'm
not going to jump to that conclusion right away with yours, keep it in mind
as a possibility.

steve<!-- ~MESSAGE_AFTER~ -->
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Chin Jin Phua

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Since: Feb 27, 2005
Posts: 17



(Msg. 4) Posted: Mon Mar 28, 2005 3:41 pm
Post subject: Re: Digital Rebel XT underexposure [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

I am having the same problem shooting yesterday. But I guess I
underestimated the lighting requirement (it is a windy, foggy at 5-6 PM in
NYC), and had gone ahead to use ISO 100 instead of 400.

Anyway, coming from a Digital P&S background(exclusively use of Spot
metering), I am struggling with the XT metering esp with bright background
and dark subject. Can anyone give some tips on how to use the metering on
the XT?

Thanks
CJ
G.T. wrote:

 > Quick report on my DR XT and underexposure, particularly when using flash.
 >
 > I'm still a newbie when it comes to metering amongst other things. It
 > seems the DR XT is still up to a stop underexposed without flash, and much
 > more underexposed when using the built-in flash.
 >
 > I took some shots last night while cooking and with no exposure or flash
 > exposure compensation the photos looked dark and there were no bits in
 > more
 > than the right third of the histogram. Bumping up FEC by a full stop
 > moved the histogram to the right considerably but the photos were still
 > underexposed.
 >
 > What's the best set of shots to determine how far off the flash metering
 > is? I was in the kitchen with a few 100 watt bulbs and a lot of white
 > paint. But then I tested on a bookshelf with mostly dark books in a dim
 > dining room with the same results.
 >
 > Is anybody else seeing this with their XTs?
 >
 > Thanks,
 > Greg<!-- ~MESSAGE_AFTER~ -->
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Big_Bob

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Since: Apr 21, 2005
Posts: 1



(Msg. 5) Posted: Thu Apr 21, 2005 1:48 pm
Post subject: Re: Digital Rebel XT underexposure [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

GT,
I am having the exact same problems. I even purchased the 580 flash to
see if it would help, and it did not. Pushing the flash up one stop
helped, but obviously not the non-flash pictures. I reciently went on
a trip to New York and took over 450 pictures for a school. I'd say 60
- 70% of the pictures were underexposed.
There is brighness/contrast settings in the Parameters sections that I
have found that are already turned up to 3/4 of the way. I had one
friend tell me that could account for the histogram offset.

Please let me know if you hear from anyone else.
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