Re: Canon EOS 20D - is this review fair?



--
Skip Middleton
http://www.shadowcatcherimagery.com
"Zed Pobre" <zed@xxxxxxxxxxxx> wrote in message
news:slrndelge1.2pm.zed@xxxxxxxxxxxxxxx
> Skip M <shadowcatcher@xxxxxxx> wrote:
>>
>> "Peter Guest" <plg@xxxxxxxxxxxxxxxx> wrote in message
>> news:r78le1h2lf1s7er30togll3meal4up7mca@xxxxxxxxxx
>>> Excerpts from a review of the EOS20D from a leading UK magazine:
>>>
>>> "Unfortunately, exposures are not quite as accurate or reliable as we
>>> might expect from an EOS camera. The 20D is prone to slight
>>> underexposure, particularly with wideangle lenses."
>>
>> Haven't observed this, my self, but I've only used Sigma 17-35 f2.8-4 and
>> Canon 16-35 f2.8L, no fixed focal length wide angles. What I have seen
>> is a
>> tendency to underexpose in ambient light situations with Speedlites and
>> less
>> that f2.8 lenses.
>
> I have pretty much the same experience. Exposure is generally correct
> on the jpg for non-flash situations, which is often about a third of a
> stop less than where I actually want it in the RAW, but I have my
> 580EX set pretty much permanently to +1EC, because every single shot I
> take with it is otherwise underexposed.

We just bought a 16-35 f2.8L and 24-70 f2.8L and guess what? All of our
flash exposures are spot on with EX flashes. What I've found is that the
camera goes to 60th sec and maximum aperture. If the max ap isn't large
enough for a proper exposure, oh well. I checked it out with my 28-135
f3.5-5.6 IS, at 70mm, it would read 1/60 @ f4.5, the same lighting with the
24-70 would be 1/60 @ f2.8. No flashing readouts, nothing.
>
>
>>> Autofocus: "the camera occasionally appears to disagree with the user
>>> about what is the subject and we found the best way of working is to
>>> switch off the auto AF sensors and select our own using the new toggle
>>> control."
>>
>> Again, haven't observed this, either, except when I press the shutter
>> button
>> repeatedly. The camera seems to say, "Ok, you didn't like that subject
>> or
>> focus pattern, let's try this one!" It keeps changing what it is focused
>> on
>> until you decide it is properly done. I, too, have turned off the auto
>> sensors, but I did that as a matter of course in the beginning.
>
> I *have* observed this, both on my 85mm f/1.8 prime and on my 75-300
> IS. The 75-300 is particularly bad about it, and since it has only a
> first generation USM, it's *really* slow when it decides to hunt.
> This is only true using all points for autofocus; if I use a single
> point, and don't screw up my own aim, it's fine. It's also fine if at
> least two autofocus spots cover your target. If you have a target
> small enough that only one dot would cover it, and you use all points,
> it will pick different spots at different times, and sometimes drive
> you batty.
>
> On the other hand, I've never used a camera that didn't have this
> problem, and it's not hard to work around.

That's why I disabled the multiple points right off the bat. I've never had
a camera with multiple point that guessed right more than 50% of the time.
And the 20D is better than the others I've tried.
The 75-300 seems to be, by all reports, rather slow, no matter what you do.
>
--
Skip Middleton
http://www.shadowcatcherimagery.com



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