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Canon EOS 1D Mark III

1DmkIII
Review Date: Dec 15, 2007 Recommend? no | Price paid: $4,500.00 | Rating: 1 

 
Pros: If it functioned as advertised it would be fantastic -- it does not, apparently even post-fix.
Cons:
The AF (AI Servo Mode) on this camera was manufactured (in what appears to be about 45,000 cameras) defective! The fix is now being applied but it does not bring the camera into the realm of the 1D Mark II in terms of AF speed and tracking.

The AF (AI Servo Mode) on this camera was manufactured (in
what appears to be about 45,000 cameras) defective! The fix
is now being applied but it does not bring the camera into the
realm of the 1D Mark II in terms of AF speed and tracking.

Images that are in focus are fantastic ISO 400 on this
camera. Noise at ISO 400 is competitive or better than that of the 1D mark II series at ISO 100!

The hit-or-miss AF is a reall millstone around an action
photographer's neck and at $4,500 for a camera that Canon
claimed would be better than the predecessor in every way,
particularly autofocussing, this is a real deal breaker and
bitter disappointment!


Should Canon ever read this they might want to note the
following:
As an engineer extremely familiar with optics I suspect that
the use of a concave submirror makes the AF inherently
unstable through the introduction of an aberation (spherical
aberation perhaps?) making the size of transmitted spot on
the AF sensor vary as it moves across the AF sensor's surface and leading to focussing errors. If this is the cause of the problem the problem will not be repairable unless and until
they re-design the entire assembly and replace the sensor
and the sub-mirror or add a correction plate to compensate
for the aberation.

Avoid this camera until an updated "N" version without bugs is
brought out!

Finally -- IF you do decide to purchase any fine camera I urge
you to buy it from B&H as they are easily the most reputable
and responsible mail order house that I have dealt with in my
20+ years of Wildlife and Nature photography. N0TE -- I am
in ABSOLUTELY NO WAY Assiciated or Affiliated with B&H
other than as a satisfied customer entering my 3rd decade as
a client!


 
Canon EF-S 10-22mm f/3.5-4.5 USM

EF10-22
Review Date: Apr 25, 2007 Recommend? yes | Price paid: Not Indicated | Rating: 10 

 
Pros: Wide angle -- equivalent to 16-35mmm on full frame, very low distortion even at 10mm! Sharp, even wide open....
Cons:
Hood should be supplied -- sadly it is not. Go to e-Bay....

I just purchased this lens for a trip, checked it out for distortion, chromatic aberration, sharpness and contrast.

It has very little distortion - almost none at mid zoom and long end, and almost imperceptible barrel distortion at 10mm. Never seen a wide angle lens in this range that did anything close to this well on this....

CA -- in the corners at 10mm wide open it has what I would rate as very slight CA -- on the 20D sensor about 2 pixels of Blue-Yellow CA (0.0024 in PT Lens correction) and about 1 pixel in Red-Magenta (0.0003 in PT Lens correction). Generally this is outstanding performance, all wides have difficulties at f4 and these angles... this lens less than most.

Sharpness and contrast -- Very good -- small details on the counter top (I used a cluttered kitchen to evaluate the lens as the details are all known to me, in a scenic there is much less stringency in an outdoors scene -- few right angles or items of known size/with print etc.) are clear and detailed. Writing on stove is barely legible (not in plane of focus!) with pixelation being the limiting factor in resolution even at the edges of the photo....

Generally this lens is one of the best wide angles I have ever used in terms of optical quality. I expect it to be quite servicable in the Grand Canyon where I will be using it's slow distortion to do panorama shots.... I'll let you all know how it turns out to be in practice....

Grover Larkins