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400D is reported to be too noisy - CNET

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Ira Ram said:
Don’t expect it to be magnificent and
don’t forget, you get what you pay for. It's not expensive on the
one hand but crappie kit lens on the other hand. It's all fair and
square.
Click to expand...
That's not the issue. The reviewer could have panned it for the bad kit lens. And that will be acceptable.

BUT to say its image quality in terms of ISO performance is not as good as the D80 is a JOKE.

You want a fair comparison? See the onr on DPReview.

-------------------------------------------
See the colors of my world in:
thw.smugmug.com
 
I bet the review gallery will be shot with fast 1.8 and 2.8 L lenses most Xti buyers can't even afford. The cameras would be tested with kit lenses. If a kit lens is slow, you are likely to have more noise in your images.
thw said:
thw said:
Don’t expect it to be magnificent and
don’t forget, you get what you pay for. It's not expensive on the
one hand but crappie kit lens on the other hand. It's all fair and
square.
Click to expand...
That's not the issue. The reviewer could have panned it for the bad
kit lens. And that will be acceptable.

BUT to say its image quality in terms of ISO performance is not as
good as the D80 is a JOKE.

You want a fair comparison? See the onr on DPReview.

-------------------------------------------
See the colors of my world in:
thw.smugmug.com
-------------------------------------------
Click to expand...
--
Feel free to visit my homepage: http://tom.st
my best shots: http://www.dreamstime.com/resp189502
 
thw said:
thw said:
Lori Grunin says in her flash video review of the 400D at:
http://reviews.cnet.com/Canon_EOS_Rebel_XTi_kit_black/4505-6501_7-32034086.html

"Canon has increased the resolution of the sensor to 10MP in this
model, but the sensor is the same size as the previous model so
it's noisier and isn't as sensitive"
Click to expand...
Click to expand...
Like, oh m'Gahd
thw said:
thw said:
also:

"Overall it's still a good camera, a very good camera, however it
has been edged out by the Nikon D80 in terms of speed and image
quality"
Click to expand...
From this, I infer the sensor in the D80 has grown larger than the
APS-C standard.
Click to expand...
That sensor comment was the clincher on Lori, for sure.
 
Ira Ram said:
I think all of us,
cannon lovers, should ...

Bottom line, there's always room for improvement. Don’t like the
400d or don’t like cannon policy… Don’t buy it. That’s the only way
to make your stand and impact.
Best Regards.
Click to expand...
I think it's Canon....not cannon.
 
"poor exposure of backlit subjects."

Listed as a "bad" on the review. What's that all about?
 
tom sugnet said:
I bet the review gallery will be shot with fast 1.8 and 2.8 L
lenses most Xti buyers can't even afford.
Click to expand...
The DPReview gallery for the Nikon D80 was shot with the very EXPENSIVE Nikkor 17-55 f/2.8 lens. Does that mean the conclusions are NOT valid too? ;)
tom sugnet said:
The cameras would be tested with kit lenses. If a kit lens is slow, you are
likely to have more noise in your images.
Click to expand...
Nikkor 18-135 kit lens used in CNET can hardly qualify as a fast lens.

-------------------------------------------
See the colors of my world in:
thw.smugmug.com
 
Not all pictures. Some were shot with the kit les. I've yet to see some
pics shot with the Canon kit lenses in dpreview review galleries.
thw said:
thw said:
I bet the review gallery will be shot with fast 1.8 and 2.8 L
lenses most Xti buyers can't even afford.
Click to expand...
The DPReview gallery for the Nikon D80 was shot with the very
EXPENSIVE Nikkor 17-55 f/2.8 lens. Does that mean the conclusions
are NOT valid too? ;)
thw said:
The cameras would be tested with kit lenses. If a kit lens is slow, you are
likely to have more noise in your images.
Click to expand...
Nikkor 18-135 kit lens used in CNET can hardly qualify as a fast lens.

-------------------------------------------
See the colors of my world in:
thw.smugmug.com
-------------------------------------------
Click to expand...
--
Feel free to visit my homepage: http://tom.st
my best shots: http://www.dreamstime.com/resp189502
 
Ira Ram said:
I think the review is fair and honest.
Click to expand...
I'm surprised anyone would want to defend this:

"Simply metering on the subject's face should have solved this shot's exposure problem, but the partial metering didn't work (left). A spot meter probably would have been able to handle it. Instead, I had to boost the exposure value of the entire scene by jumping to ISO 400 (right)."

or this:

"Canon has increased the resolution of the sensor to 10MP in this model, but the sensor is the same size as the previous model so it's noisier and isn't as sensitive"
 
If you are going to compare, you should use the same EV and keep 2/3 equal, so the third can be compared. oh yeah and have a range of images too because their relative effect shifts between images. oh yeah and have comparible lenses because that influences the result too. And that's just the start. Overall, I can see why people discuss this so much.

--len
 
What I've noticed with my Xti that it uses different exposure depending on lenses.

I have EF 24-105L and the kit. The shots taken with the kit usually underexposed by 1/3 when the same scene (and at teh time) shot by L lenses looks perfect.

Does anybody noticed that difference ?
 
tom sugnet said:
Not all pictures. Some were shot with the kit les. I've yet to see
some
pics shot with the Canon kit lenses in dpreview review galleries.
Click to expand...
OK. It's only 33 out of 40 pics taken with Nikkor 17-55 f/2.8. Remaining shots with the 18-135 were taken in bright light conditions.
tom sugnet said:
tom sugnet said:
Nikkor 18-135 kit lens used in CNET can hardly qualify as a fast lens.
Click to expand...
Click to expand...
The same thing remains.

-------------------------------------------
See the colors of my world in:
thw.smugmug.com
 
No to mention Dpreview shows me comparable photo's.. Odd that a camera review includes no pictures??
jpstanley said:
CNET review says:

"Furthermore, while still relatively low for its class, the XTi's
measured and visible image noise was significantly worse than that
of the CCD-based Nikon D80 for any given ISO speed."

DPReview Nikon D80 review indicates the XTi has nower noise than
the D80 through ISO 400. Above that, the D80 has lower noise--at
the expense of blurred detail.

http://www.dpreview.com/reviews/nikond80/page18.asp
Click to expand...
 
Lens Speed vs Camera Noise
I am a bginer and beg tolerance if questions are too basic.
Do most agree fast lens has less noise? Why?
What attribute makes a lens fast or slow?
What attribute value range does fast start at?
What attribute value range is slow?

Is there a relationship between noise and flash card speed? (10srs vs 40 srs)
Is there a relationship noise vs stable/unstable/stabalized?

When is noise revalant?

Bill
 
His "metering" example is plain silly. With the kid filling that much of the frame, all metering modes would have had no problem getting proper exposure. Not sure why he found different results at ISO 400 unless he was using one of the dummy modes.

Thankfully, there are better reviewers out there, including Phil here on DPR.
--
Tom
 
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