I'm giving up on my Canon Rebel Ti1 camera.
William
T1i has a design flaw in the sensor. It appears to be unable to handle
bright outdoor photographs. After 5 outdoor trips around the state, each
time I have come back to my home and looked at the pictures, I have observed
overexposure, (even after stopping down a full stop), red and magenta halos
around bright objects, and most recently red halos around red flowers.
This last trip was to the Portland, OR Rose Gardens. I took many photos
around the place, all at 1 f-stop down. When I was shooting rose bushes
with red and off-red colors, the leafs all had red halos around them. It
was a mess. Some group shots were a mix of results. Some white flowers
were perfect while others were washed out. Buildings had halos on bright
siding and roofs. Edges of stairs had red halos across them. I guess I
should have stopped down 2 or 3 f-stops. Unfortunately, their is no easy
way to check the pictures when outdoors, in the bright light to see what is
happening.
I have called Canon and the only thing they can suggest is to send the
camera back for repair. Include photos and a description of the problem and
how to create it. That's fine, but what do I do while the camera is in the
shop - the holidays are coming up.
So I have decided to purchase the new Canon D7 hoping it handles bright
exposures better. The specifications and reviews look promising. I will
have a 30 day money-back warranty from NewEgg, and it will get a work out.
Then I may send the T1i back to Canon for service, though I doubt they will
be able to do anything for the problem. Call the camera my backup.
Am I the only one who has seen this problem? It reminds me of the 5D Mark
II and the trailing red smear around hot images. A filmware update
corrected that design flaw. I hope the same may be done on the T1i.
William
ben bradlee
news:V9mdnXeMcIV0cVrX...@posted.palinacquisition...
>I hate to come to this conclusion, but it looks like the Canon Digital
>Rebel T1i has a design flaw in the sensor. It appears to be unable to
>handle bright outdoor photographs. After 5 outdoor trips around the state,
>each time I have come back to my home and looked at the pictures, I have
>observed overexposure, (even after stopping down a full stop), red and
>magenta halos around bright objects, and most recently red halos around red
>flowers.
>
> This last trip was to the Portland, OR Rose Gardens. I took many photos
> around the place, all at 1 f-stop down. When I was shooting rose bushes
> with red and off-red colors, the leafs all had red halos around them. It
> was a mess. Some group shots were a mix of results. Some white flowers
> were perfect while others were washed out. Buildings had halos on bright
> siding and roofs. Edges of stairs had red halos across them. I guess I
> should have stopped down 2 or 3 f-stops. Unfortunately, their is no easy
> way to check the pictures when outdoors, in the bright light to see what
> is happening.
>
> I have called Canon and the only thing they can suggest is to send the
> camera back for repair. Include photos and a description of the problem
> and how to create it. That's fine, but what do I do while the camera is
> in the shop - the holidays are coming up.
You won't have the camera back by Columbus Day, (Thanksgiving Day in Canada)
the next holiday, but it should be back by Veteran's Day (Remembrance Day in
Canada and the UK.) Canon is pretty quick with the turn around time for
repairs. As long as the problem can be duplicated, there should be no
problem with the fix. If the camera is still under warranty, sending the
camera to Canon would be a simple decision. If the camera is not under
warranty, it will cost you to send it there for an estimate of repair cost.
Then you can decide if the repair of the old camera or a new camera is the
better decision.
> So I have decided to purchase the new Canon D7 hoping it handles bright
> exposures better. The specifications and reviews look promising. I will
> have a 30 day money-back warranty from NewEgg, and it will get a work out.
> Then I may send the T1i back to Canon for service, though I doubt they
> will be able to do anything for the problem. Call the camera my backup.
I saw the information for the D7 on the Canon website a while back. It
looks like a promising camera. It appears to be sturdier than the Rebel
line and have the latest features. I wouldn't keep a camera with the
problems you describe as a backup. Pictures are too important to have the
clutch shots relegated to a camera with known problems. Sell it and buy
something that works.
> Am I the only one who has seen this problem? It reminds me of the 5D Mark
> II and the trailing red smear around hot images. A filmware update
> corrected that design flaw. I hope the same may be done on the T1i.
You might be. I was unaware of the trailing red smear on the 5D and I have
that camera.
> William
Good luck with whatever you do.
William
"ben bradlee" <No...@Way.Bite.Me> wrote in message
news:C5mdnXZVJIyqWlXX...@centurytel.net...
Unfortunately I don't think Canon can do anything with this problem. It
looks like a design problem, perhaps a different sensor may be less
effected, and perhaps a filmware update can at lease suppress the color in
the halo, which may be all that can be hoped for.
I grew up in electronics and became a Video Production Engineer for a
living. I started out on vacuum tube imaging sensors, such a Vidicons,
Saticons, Newvicons, and Plumbicons. Then it was CCD's and now CMOS
sensors. I have watched the technology progress, and have seen the problems
each generation has introduced into the camera sensor, and the fixes the
manufacturers have introduced. This problem looks like the diode sensors in
the CMOS imager are becoming so saturated that extra electrons are being
bled into adjacent diodes. (Adjacent rows or columns?)
Now that I have become interested in seeing this problem, I have seen it
more often in other photographers photos posted on DeviantArt and Photo.net.
Just recently I was looking at some photos made from an EOS 40D, which had
the same problem as well. Last year while reading reviews at Photo.net on
the 5D Mark II, they were discussing where indoor photos taken with bright
spot lights were experiencing a trailing red halo. It became known as the
Christmas Tree Light Bulb Effect. Not all cameras exhibited the problem.
About 4 months into distribution a filmware update was issued that masked
the problem. No more complaints.
I believe the same problem with the T1i can be fixed the same way. If the
filmware would just remove the chroma from the over exposed pixels involved,
it would not be so noticeable or distracting. I do however believe the
exposure process is not handling bright daylight settings. This is not
surprising as all the new technological push is towards faster and more
sensitive imagers. The images from the T1i in normal daylight to subdued
lighting is amazing. Excellent sensitivity and color saturation. I have
received rave reviews from photos taken indoors.
I purchased the T1i back in April of this year (replacing a SXi - wishing I
had held onto that one a little longer than I did,) when it was introduced,
and will be sending it back for warranty repair once I have verified that
the new D7 dos not suffer from any known problems. I do hope a new sensor,
or perhaps a tweak might fix everything. (A simple bias adjustment on the
sensor may be all that is needed, they run them very close to cascading in
order to obtain low-light sensitivity - a close tradeoff between the two.)
I also think a filmware update could be the fix that is needed, a simple
down-load to my computer and update to the camera.
>
>> So I have decided to purchase the new Canon D7 hoping it handles bright
>> exposures better. The specifications and reviews look promising. I will
>> have a 30 day money-back warranty from NewEgg, and it will get a work
>> out. Then I may send the T1i back to Canon for service, though I doubt
>> they will be able to do anything for the problem. Call the camera my
>> backup.
>
> I saw the information for the D7 on the Canon website a while back. It
> looks like a promising camera. It appears to be sturdier than the Rebel
> line and have the latest features. I wouldn't keep a camera with the
> problems you describe as a backup. Pictures are too important to have the
> clutch shots relegated to a camera with known problems. Sell it and buy
> something that works.
I might do that after the first of the year along with the kit lense, 5
batteries, the battery grip, remote shutter control, 4 - 2 gig and 2-8gig SD
memory cards. The camera, even in its crrrent condition, does work very
well out of direct sun light exposure.
>
>> Am I the only one who has seen this problem? It reminds me of the 5D
>> Mark II and the trailing red smear around hot images. A filmware update
>> corrected that design flaw. I hope the same may be done on the T1i.
>
> You might be. I was unaware of the trailing red smear on the 5D and I
> have that camera.
It has been corrected, no need to worry.
Thank you again.
Mark D. Tetrault
wrote:
>I hate to come to this conclusion, but it looks like the Canon Digital Rebel
>T1i has a design flaw in the sensor. It appears to be unable to handle
>bright outdoor photographs. After 5 outdoor trips around the state, each
>time I have come back to my home and looked at the pictures, I have observed
>overexposure, (even after stopping down a full stop), red and magenta halos
>around bright objects, and most recently red halos around red flowers.
Although I "think" I read a review somewhere that mentioned that, my
own T1i is not exhibiting that problem. Just got back from shooting
over 70 pics in the Ute Tribal Lands in full sunlight without 1
overexposed shot. I had 2 that showed some movement (fuzzy) with my
28-135IS lens, but I'm sure that was my poor footing during the shot
that caused it.
While I have only owned my T1i a short while, the shots I have taken
are head and shoulders above my older XTi (always seemed
underexposed). I would look into warrantee repairs on your camera.
Mark
Di-Mar Imaging & Design
Quality Campground Maps & Brochures
Concord, NH
(603) 387-9392
paul405
greasy lenses can cause problems, and if you have accidently set a picture
style up
maybe a total setting camera reset and try again ..... try with prime lense
or fixed focal length
and see if any better ..
PJ