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Old May 17, 2010, 8:53 PM   #1
LEK
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Default subtle color difference iAuto vs Normal mode, what am I seeing?

I'm going to try to post a few pictures here from my ZS3, I hope this is successful. I am comparing the iAuto mode with the normal mode with iISO and iexposure on, so the only difference should be that iAuto generates a scenery mode. But i notice a consistent difference in the color of the two photos, with the normal mode consistently having a bit more vivid color especially in red tones. It's quite noticeable on cloudy days, which were the conditions for the first two shots. More subtle on sunny days(last 2 shots). Any comments on what I am seeing, it shows up consistently? (these are not photos taken for quality of the photos, I chose them for the color difference, they are just snapshots). Thanks for any thought on this. I'm posting so the photo in normal mode appears first.


http://i194.photobucket.com/albums/z...20pics/014.jpg

http://i194.photobucket.com/albums/z...20pics/013.jpg

http://i194.photobucket.com/albums/z...20pics/011.jpg

http://i194.photobucket.com/albums/z...20pics/010.jpg

http://i194.photobucket.com/albums/z...estpics102.jpg

http://i194.photobucket.com/albums/z...estpics101.jpg

http://i194.photobucket.com/albums/z...estpics093.jpg

http://i194.photobucket.com/albums/z...estpics092.jpg

Last edited by LEK; May 17, 2010 at 9:55 PM.
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Old May 17, 2010, 9:47 PM   #2
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Darn, I thought the actual pictures would come up. Well I posted the link to the whole Photobucket page if that helps. Sorry.

http://s194.photobucket.com/albums/z...20test%20pics/

Last edited by LEK; May 17, 2010 at 10:08 PM.
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Old May 18, 2010, 12:12 AM   #3
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See the difference?, the camera is choosing two different settings to take the same picture...thats all it takes to see a lighter or darker exposure...the 1/200 second setting is exposing longer and this increases light to the sensor and the picture/exposure comes out lighter and brighter...the 1/320 second exposure is shorter and therefore the sensor is exposed a shorter time duration causing a darker picture/exposure


IAuto:

Last edited by LTZ470; May 18, 2010 at 12:15 AM.
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Old May 18, 2010, 12:59 AM   #4
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Oh! Thanks! So it's not a color difference, it's an exposure difference, but that makes the colors darker in the darker exposure, right? Funny that the camera would make different choices like that, both photos were on iexposure and iISO, the only difference that I can figure between the two was that the iAuto brought in the scenery mode and the normal mode didn't. So which exposure is better? It seemed like the lighter exposure may have been a bit sharper at times(can see the duck's eyes better) but the colors looked a little flat compared with the darker exposure, especially on the cloudy day photos like the duck, it seemed like the darker exposure had warmer tones. In sunlight though, I think perhaps the lighter exposure was better. Is either one underexposed or overexposed, or are they just different? Which is preferred for landscape photos? I just started reading the photography books I bought so hopefully this will all become easier.
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Old May 18, 2010, 7:52 AM   #5
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Which looks the better to you? Thats the great thing about photographs, no one has to like it but you...I thought the lighter one looked better to me also as there was more detail to see...but if you want it sharper bring your max Aperture down to 5.6 to 8 in that range and try a few shots your basically :squinting" the ete of the camera to get a clearer picture...
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Old May 18, 2010, 9:39 AM   #6
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Thanks for answering the original question. I'm trying to post the photos on this message rather than just have the link, so that I know how to do it for future reference. I'm following the directions on the FAQ page, I've tried and tried and can't seem to post the photos themselves. I keep getting messages that the upload failed, and then get the message that it's an invalid website. I'm at a loss, how do I post pictures? It's not so important for this post, but I'd like to know for the future.
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Old May 18, 2010, 10:23 AM   #7
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Then Hit: "Post Quick Reply"
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Old May 18, 2010, 10:53 AM   #8
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I did it! Thanks! (remember these are just to see the exposure differences, I know they're not good photographically).
















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Old May 18, 2010, 11:31 AM   #9
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To me, the difference in color you see particularly on the shots take under cloudy conditions is due to different white balance settings. Most cameras (if not all) have a variety of white balance settings besides AUTO (i.e. sunny, cloudy, shade, etc.). On cloudy days, some cameras will produce a bluish cast if the white balance is set to AUTO. The reason is because the camera can't tell exactly what the Kevin value is for the cloudy condition. Thus, by setting the WB to cloudy, the camera will use a certain Kevin, which gives a much warmer look. My guess is that in iAUTO your camera is smart enough to detect the light conditions and it is setting the WB to "cloudy", thus producing the warmer tones (a bit more reddish), quite noticeable on the first two shots. There is also a difference in exposure between settings but that should affect color saturation. It affects the brightness of the image (i.e. on the last picture, the second image is much brighter and details on trees, bushes and grasses are much greater). Personally, I prefer the non-iAUTO images. They have more accurate colors and better exposure but, it's very much a matter of personal preference.
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Old May 18, 2010, 11:53 AM   #10
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Thanks Tullio. Just to clarify the top photos are the ones set to normal, the bottom are set to iAuto. The top (normal) ones look to me like they have a warmer color on them, though the iauto seemed a bit sharper. When you said you preferred the non-iAuto images, were you talking about the top ones or the bottom ones, I got a bit confused and thought maybe you were switching them? I think you meant you like the bottom ones better, which were the iAuto, but wanted to make sure since that's not what the post said?
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