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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 24 Nov 2007 (Saturday) 10:56
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Images Become Too Dark After Downloading - Need Fix!

 
vrjoyner
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Nov 24, 2007 10:56 |  #1

I am using a Canon A710IS camera. The images viewed in the camera's LCD appear correctly exposed and could print perfect. However, when I download the images from the camera to my Mac computer through Canon's Camerawindow software, every image becomes too dark, pure white backgrounds get extreme color shifts. Then I have to spend too much time in Photoshop correcting the images.

Does anyone have any solutions to preventing or correcting this problem. Much appreciate your answers.

Thanks
Viola :confused:




  
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rkkwan
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Nov 24, 2007 11:03 |  #2

I don't think it's your camera or your computer itself. But your screen. You need to calibrate your screen if you want to do serious photo work. Otherwise, what you fix on your screen may look wrong on most other people's monitor or when printed.

You need something like a iOne or Spyder or whatever the latest product is.


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PixelMagic
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Nov 24, 2007 11:16 |  #3

Actually you should not be using your camera's LCD display to judge exposure; you most certainly should use the built-in histogram.

I suspect your LCD display is turned up high so the exposure looks reasonably correct but that's not what the camera is actually seeing.


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number ­ six
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Nov 24, 2007 19:09 |  #4

Viola, can you upload an example? Or post it and give us the link? Then we can view it on our screens and tell you what we see...

-js


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sandpiper
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Nov 24, 2007 19:46 |  #5

FedkaTheConvict wrote in post #4375860 (external link)
Actually you should not be using your camera's LCD display to judge exposure; you most certainly should use the built-in histogram.

I suspect your LCD display is turned up high so the exposure looks reasonably correct but that's not what the camera is actually seeing.

This would be my thoughts too, the LCD doesn't necessarily show the exposure accurately and shouldn't be used to judge how the actual image will look. You do need to use the histogram.




  
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Anke
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Nov 24, 2007 21:14 |  #6

This is especially true if you shoot in RAW, is this camera capable of RAW?


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vrjoyner
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Nov 24, 2007 22:53 |  #7

Thanks everyone for your assistance. New to me is that the LCD does not show the accurate exposure. Nice to know that moving forward. The A710IS does not shoot in RAW unfortunately.

I have attached a sample image for your review and critiques.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO
.

Thanks,
Viola

P.S.
On the LCD monitor, the polar bears are white with detail/texture in the fur and the background is close to white without being blown out.



  
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dekalbSTEEL
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Nov 24, 2007 23:10 |  #8

Not on my monitor:(

Sounds like you've got calibration issues. Could you upload a full size image with the exif intact (Do not use "save for web" if using Adobe Photoshop, use "SAVE AS") try imageshack.us to upload a full size shot, then use the "insert image" icon to link to it


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vrjoyner
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Nov 25, 2007 00:04 |  #9

OK, per dekalbSTEEL instructions, here is a full-size image with the exif intact.

[IMG]http://[IMG]http://img266.imagesha​ck.us …neruntouchedbig​xz4.th.jpg (external link) (external link)

Thanks,




  
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tzalman
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Nov 25, 2007 06:50 |  #10

The picture is about one stop underexposed and has a yellow cast (white balance is off).
This is the histogram. See how the peak is 3/4 of the way over rather than being all the way near the right side?


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number ­ six
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Nov 25, 2007 12:59 as a reply to  @ tzalman's post |  #11

I see it the same as Tzalman does.

I bumped up the brightness and contrast and adjusted the white balance on the face of the left bear. The bears appear to be illuminated by mixed light (daylight and incandescent?) so white balance is tough to get right.


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Does this look better on your monitor, Viola?

-js

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vrjoyner
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Nov 25, 2007 17:14 |  #12

Number Six, yes the photo does look better on my monitor even with a cyan cast. My present lighting setup is both daylight and incandescent and I did a "white balance" exposure to balance both of these different temperatures in the lights. It appears that didn't work. Unfortunately, I do not presently have professional strobe lights to set up the best lighting environment to get optimum balanced exposures while photographing indoors.

Any suggestions to help get the best exposure with the lights I am now using and with using the A710IS?:confused:




  
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number ­ six
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Nov 25, 2007 17:35 |  #13

vrjoyner wrote in post #4383391 (external link)
Number Six, yes the photo does look better on my monitor even with a cyan cast. My present lighting setup is both daylight and incandescent and I did a "white balance" exposure to balance both of these different temperatures in the lights. It appears that didn't work.

Ah, my crystal ball did identify your lighting!

Mixed lighting like that is basically impossible to balance because the mixture of daylight and tungsten light is different in different parts of the scene. You can do custom WB at one spot and your balance will be good - at that spot. No help elsewhere in the scene.

vrjoyner wrote in post #4383391 (external link)
Any suggestions to help get the best exposure with the lights I am now using and with using the A710IS?:confused:

Two things need correction: the exposure and the white balance.

Your exposure is dark because your camera normally assumes the scene is average gray, not mostly white as is the case here. Your exposure compensation is set to +2/3 stop - the right idea, but not enough. I'd shoot this scene just as I would a snow landscape: at +2 EC.

White balance just won't work with a varying mixture of light, as I explained earlier. You need to go with one type of light or the other - either draw the shades on the daylight and go with tungsten, or turn the tungsten lights off and use daylight plus flash.

Sounds like your monitor is reasonably close to mine - in my version I see the bodies of the bears as pinkish, the faces white, the waist of the right bear is bluish, as is the background behind them. The shadow between the front legs of the left bear is very blue.

The brightness is set such that there are no blown whites anywhere except towards the bottom of the right bear's foot.

If it looks about like that on your monitor your calibration is reasonable.

-js


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vrjoyner
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Nov 25, 2007 20:13 |  #14

What a relief that it's not the calibration on my Mac monitor (because I just calibrated it and thought I done it right).

Your description of what you see on your monitor, Number Six, is matching what I see on my monitor. The solution is in the lighting and exposure settings, which I will test and fix for the next photo shoot.

Thank you all again for helping me get on the right track.

Viola:D




  
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number ­ six
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Nov 25, 2007 23:15 |  #15

vrjoyner wrote in post #4384504 (external link)
What a relief that it's not the calibration on my Mac monitor (because I just calibrated it and thought I done it right).

Your description of what you see on your monitor, Number Six, is matching what I see on my monitor.

Glad to help. An accurate monitor is of the greatest importance. Those of us who still use a CRT monitor have an advantage, IMO...

-js


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Images Become Too Dark After Downloading - Need Fix!
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