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Dark photos, exposure correct
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Sep 23, 2016 10:16:50   #
mjmjam Loc: Michigan
 
meter on the grass. that will give you a good grey scale setting

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Sep 23, 2016 10:18:05   #
PHRubin Loc: Nashville TN USA
 
Although RAW was used, to see an image it must be converted (TIFF or the like) and that can affect exposure - just sayin'

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Sep 23, 2016 10:18:46   #
PHRubin Loc: Nashville TN USA
 
A thought - does exposure compensation work in manual exposure??

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Sep 23, 2016 10:25:28   #
mjmjam Loc: Michigan
 
Good point on the Raw

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Sep 23, 2016 10:41:58   #
CatMarley Loc: North Carolina
 
kenArchi wrote:
Why do digital photos come out dark. They look like they are under exposed.
The first photo is correct exposure at f8 1/400 sec. I use a Gossen meter incident reading.
The second photo is f8 1/200 sec.
The second photo brightness is actually how I see it.
When I was using film and doing my own scanning with the Nikon 2400 scanner, the scans would not be dark like digitals, without doing any adjustments.
These photos are from raw files, no adjustments.
Am I not understanding something here?
It seems like I always have to over expose my photos.
Maybe my camera needs exposure adjustment somehow.
Why do digital photos come out dark. They look lik... (show quote)


It looks to me that your camera's meter was reading the large white area and exposing it to appear a light gray. The trick to using your camera's meter is to spot meter on a density neutral area. A patch of dirt is an example. Or if you are doing a landscape containing large pale areas and using a broad field as the metering area, then you should apply some negative exposure compensation, knowing that the meter is going to expose so that the average light from the entire area is 18% gray.

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Sep 23, 2016 10:42:45   #
IowaGuy Loc: Iowa
 
dirtpusher wrote:
i would say it was reading off the walls .


That was my first guess. Meter on the walls and you'll be at least 1 stop underexposed as the meter is giving you an exposure for 18% gray. Try this again metering off the sunlit green (which in my understanding is near 18% gray in luminance).

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Sep 23, 2016 10:43:45   #
Nalu Loc: Southern Arizona
 
Apaflo wrote:
I'll give you a technical analysis, which will probably sort of blow your mind: They are both over exposed. What? you say! ...

It is not terribly difficult to use an editor to measure the pixel values in various parts of an image. No pixels should have a value greater that 245 in areas where detail should be visible. The values don't clip until 255, but from 246 to 255 they are washed out on either a print or a monitor. Hence pixels along edges (particularly when sharpening has been used) will commonly be higher than 245, and sometimes there are areas where we just don't care (spectral reflections are an example).

In your images there are high pixel values around the edges of the building, and that is okay because you can't see detail there anyway. But that round white object in front of the house should not be brighter than 245, and in fact it is much brighter with about half of it clipping at 255. (And that is in the dark image!)

So it is definitely not underexposed, and technically is overexposed though probably within the range most people would accept. The actual problem is the dynamic range of bright sunlight is greater than a JPEG image can display, and too much of the range is in the dark areas for these images. To correct that you'd want to use a "curves" tool and adjust the gamma curve. If the lower half of the curve is raised just 1 fstop or so, things look much nicer.

If you shoot JPEG that means before taking pictures in bright sunlight you might want to adjust the "contrast" (same thing as gamma) in the camera settings before shooting. You can also edit images later, but the best way to do that is shoot RAW and adjust contrast/gamma in the RAW converter rather than in the JPEG image.
I'll give you a technical analysis, which will pro... (show quote)


Excellent comments and right on. I try to keep my highlights below 240 and will not bring an image into photoshop until they are in the 235/240 range. I am assuming the histogram on both images will confirm your findings.

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Sep 23, 2016 10:47:30   #
Apaflo Loc: Anchorage, Alaska
 
PHRubin wrote:
Although RAW was used, to see an image it must be converted (TIFF or the like) and that can affect exposure - just sayin'

Exposure is controlled by how much time the shutter is open and how wide the aperture is.

It cannot be changed after the shutter release is pressed.

You are referring to brightness, not exposure. (It does make a difference.)

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Sep 23, 2016 10:56:57   #
burkphoto Loc: High Point, NC
 
CatMarley wrote:
It looks to me that your camera's meter was reading the large white area and exposing it to appear a light gray. The trick to using your camera's meter is to spot meter on a density neutral area. A patch of dirt is an example. Or if you are doing a landscape containing large pale areas and using a broad field as the metering area, then you should apply some negative exposure compensation, knowing that the meter is going to expose so that the average light from the entire area is 18% gray.


He used a hand-held incident light meter. Incident meters read the light source, not the subject.

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Sep 23, 2016 11:04:09   #
rehess Loc: South Bend, Indiana, USA
 
Here are histograms of the two images, as provided by gimp's "curves" tool.

It appears to me that neither image is slid too far off {i.e., neither has a peak at the end} to be fixed to something more reasonable by adjusting levels.


(Download)


(Download)

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Sep 23, 2016 11:16:29   #
Pablo8 Loc: Nottingham UK.
 
IowaGuy wrote:
That was my first guess. Meter on the walls and you'll be at least 1 stop underexposed as the meter is giving you an exposure for 18% gray. Try this again metering off the sunlit green (which in my understanding is near 18% gray in luminance).


***************************************************************************************************
The OP was using an INCIDENT reading from a HAND-HELD METER. Another' advisor' who thinks the OP was using TTL readings through the camera. A little knowledge is a dangerous thing. Please read (and fully understand) what the OP was doing, AND USING, to achieve his exposure readings.

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Sep 23, 2016 11:16:49   #
GENorkus Loc: Washington Twp, Michigan
 
kenArchi wrote:
Why do digital photos come out dark. They look like they are under exposed.
The first photo is correct exposure at f8 1/400 sec. I use a Gossen meter incident reading.
The second photo is f8 1/200 sec.
The second photo brightness is actually how I see it.
When I was using film and doing my own scanning with the Nikon 2400 scanner, the scans would not be dark like digitals, without doing any adjustments.
These photos are from raw files, no adjustments.
Am I not understanding something here?
It seems like I always have to over expose my photos.
Maybe my camera needs exposure adjustment somehow.
Why do digital photos come out dark. They look lik... (show quote)


The Gossen meter is averaging everything. Try Spot Metering your camera on the "normally" light grass. Looks like your meter was averaging the bright wall. In my opinion, the wall of the first looks great where the wall in the 2nd one looks really close to being blown out. All that can be fixed to look good in post.

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Sep 23, 2016 11:18:07   #
selmslie Loc: Fernandina Beach, FL, USA
 
rehess wrote:
Here are histograms of the two images, as provided by gimp's "curves" tool.

It appears to me that neither image is slid too far off {i.e., neither has a peak at the end} to be fixed to something more reasonable by adjusting levels.

You are correct. The image can be easily adjusted.
Apaflo wrote:
I'll give you a technical analysis, which will probably sort of blow your mind: They are both over exposed. What? you say! ...

What, indeed! Neither is overexposed. I guess you can add exposure and histograms to your research list.

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Sep 23, 2016 11:26:06   #
selmslie Loc: Fernandina Beach, FL, USA
 
kenArchi wrote:
... It seems like I always have to over expose my photos.
Maybe my camera needs exposure adjustment somehow.

Before you bias your camera by adjusting the default exposure value setting, take some images where the range of brightness is not so extreme.

In this scene there is a white sunlit wall (which is not overexposed) and a deep shadow containing dark foliage. That would be a challenge for film as well as for digital.

The best approach here is to watch your histogram and blinkies and try to keep the brightest portions from blowing out. Then you can bring up the shadows in post processing.

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Sep 23, 2016 11:44:35   #
jgunkler
 
Is the first photo the straight out of camera RAW file?

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