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Old Feb 9, 2007, 4:22 PM   #11
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LOL

i didnt mean in that way..was trying to explain that person.


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Old Feb 17, 2007, 8:34 PM   #12
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There has been quite a discussion on this topic at the Canon EOS forum.
Here's a post from a guy who sent his camera in for repair and Canon fixed it.

http://forums.dpreview.com/forums/re...hread=22056656

I just received my XTi and don't seem to have the problem. Here's a test shot I did this afternoon.



File Name IMG_0013.JPG
Camera Model Canon EOS DIGITAL REBEL XTi
Shooting Date/Time 2/17/2007 2:05:15 PM
Shooting Mode Auto
Tv( Shutter Speed ) 1/400
Av( Aperture Value ) 14.0
Metering Mode Evaluative Metering
Exposure Compensation 0
ISO Speed 400
Lens EF-S18-55mm f/3.5-5.6
Focal Length 55.0 mm
Image Size 3888x2592
Image Quality Fine
Flash Off
White Balance Mode Auto
AF Mode AI Focus AF
Picture Style Standard
Sharpness 3
Contrast 0
Saturation 0
Color tone 0
Color Space sRGB
Noise Reduction Off

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Old Feb 17, 2007, 9:52 PM   #13
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The XTI keeps hightlight under control.


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Old Feb 18, 2007, 3:22 AM   #14
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coldshot wrote:
Quote:
The XTI keeps hightlight under control.
How about my Xti keeps highlight under control only with 18-55 kit lens?

If I shoot with 50 f/1.8 I have bright, sharp, clean pictures also in Auto.
With 18-55 only dark pictures.
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Old Feb 18, 2007, 8:10 AM   #15
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Different lenses give you different readings. The XTI have a good DR, you have underexpose with the kit lens but you can adjust the brightness in the editing software easy. When you have a camera that overexposes you have a hard time to bring back the detail, texture of the subject. In film you stay on the overexpose scale, digital underexpose. A friend of mine shot a wedding with an overexposed camera, he has a hard time to edit the pictures. I have another camera the Fuji S9000 tends to underexpose too.
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Old Feb 18, 2007, 11:15 AM   #16
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coldshot wrote:
Quote:
Different lenses give you different readings.
No, the light metering have to be the same with different lenses.
Have you ever seen a professional light meter like a Gossen?
http://www.adraycamera.com/index.asp...ROD&ProdID=615

Or have you ever tried with other cameras and lenses?
I bought my first SLR camera in 1977, It was a Canon AE1. Then I bought an AE1 Program in 1982, an EOS-500n in 1997 and an EOS-300x in 2005. I have many other Canon lenses and if I use them on the other cameras I have the SAME reading because this is the way the light metering works.

In shutter priority, or aperture priority a good working camera must produce images around the same brightness with the same shutter/aperture.

I tried with my Canon AE1 Program with four Canon lenses:
50 f1.8
28 f2.8
100 f2.8
135 f2.5
if I meter a cardboard here in my room I have the same metering for all the lenses: 1/30 f3.5

This is the basis of photography. If in AV, TV or P my 400d exposes differently with with two lenses, and one produces a picture darker than the other, it works bad:
http://www.diegocuoghi.it/test400d/esp-diversa/
My 400D acted in this way and I sent it to Canon assistance together with the kit lens.

I say 18-55 works bad because If the exposure had been right, the objective would have produced good photos, the same way of 50mm (the first one, the second was deliberately underexposed):
http://www.diegocuoghi.it/test400d/esp-uguale/
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Old Feb 18, 2007, 11:27 AM   #17
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I have a Minolta VF flash meter, but I don't use it unless for studio set up, I can set my XTI with pinpoint accuracy in M mode without any meter. I've shot film camera outdoor for so many years I remember by heart all the lighting.
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Old Feb 18, 2007, 1:32 PM   #18
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coldshot wrote:
Quote:
...I can set my XTI with pinpoint accuracy in M mode without any meter. I've shot film camera outdoor for so many years I remember by heart all the lighting.
OK. But the argument of the discussion is another one. I am saying that the light metering of MY 400D works bad because it gives different light readings with different lenses. For example, in shutter priority for the same scene I have 1/250 f14 with 50mm 1.8 (good exposure), and 1/250 f20 with 18-55 (dark):
http://www.diegocuoghi.it/test400d/400d_lens_test2.jpg
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Old Feb 18, 2007, 1:45 PM   #19
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I have taken part in many of the discussions on the Dpreview website. Doing my own tests, my camera tends to underexpose images (Based on my liking and also based on the histogram) 2/3 - 1 stop. Whatever mode I shoot in, I'm always having toincrease my EC by that to get the exposure that I want and to getwhat I believe is a proper histogram. If this is "normal" and how the camera should be because it preserves the highlights, then fine, I won't worry about it. However, I feel that the camera should be producing these results at 0 EC, and therefore I may send my camera into Canon just to have them check everything out and make any necessary adjustments.

My tests were done with the 18-55 EFS kit lens, a EF 28-80 and an EF 75-300.


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Old Feb 18, 2007, 8:00 PM   #20
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The best way is to send the camera to Canon with underexposed shotsand a note of what you experienced, after all they have the necessary tool to check your camera, I've heard they have good customer service.
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