Thanks, but yes, I always use a tripod for tests and a fairly fast shutter speed. I used ISO 200 for these shots. It would appear that this is an example of mis-aligned internal elements and/or internal reflections. The full settings:
File: - C:\My Documents\My Pictures\Canon\Lens_Tests\_MG_5242_smaller.jpg
Make - Canon
Model - Canon EOS DIGITAL REBEL XT
Orientation - Top left
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
DateTime - 2006:02:02 11:04:25
WhitePoint - 0.31
PrimaryChromaticities - 0.64
YCbCrCoefficients - 0.30
YCbCrPositioning - Co-Sited
ExifOffset - 320
ExposureTime - 1/800 seconds
FNumber - 2.80
ExposureProgram - Aperture priority
ISOSpeedRatings - 200
ExifVersion - 220
DateTimeOriginal - 2006:02:02 11:04:25
DateTimeDigitized - 2006:02:02 11:04:25
ComponentsConfiguration - YCbCr
ShutterSpeedValue - 1/800 seconds
ApertureValue - F 2.80
ExposureBiasValue - 0.67
MeteringMode - Partial
Flash - Not fired, compulsory flash mode
FocalLength - 200 mm
UserComment -
FlashPixVersion - 100
ColorSpace - Uncalibrated
ExifImageWidth - 640
ExifImageHeight - 427
InteroperabilityOffset - 9366
FocalPlaneXResolution - 3954.23
FocalPlaneYResolution - 3958.76
FocalPlaneResolutionUnit - Inch
CustomRendered - Normal process
ExposureMode - Auto
WhiteBalance - Auto
SceneCaptureType - Standard
Maker Note (Vendor): -
Macro mode - Normal
Self timer - Off
Quality - Fine
Flash mode - Not fired
Sequence mode - Continous
Focus mode - One-Shot
Image size - Large
Easy shooting mode - Manual
Digital zoom - None
Contrast - Normal
Saturation - Normal
Sharpness - Normal
ISO Value - 32767 (other)
Metering mode - Partial
Focus type - Auto
AF point selected -
Exposure mode - Av-priority
Focal length - 70 - 200 mm
Flash activity - Not fired
Sequence number - 0
White Balance - Auto
Image Type - Canon EOS DIGITAL REBEL XT
Firmware Version - Firmware 1.0.1
I spoke to Sigma4Less yesterday and today and they will allow me to upgrade to the Canon 70-200mm, f2.8L, for a very competitive price. I really like working with these folks.
Ziggy, how did your final exchange go? You put a little fear in me about my own Sigma 70-200/2.8 lens, so I went out and tested it. Tripod, remote release, 100% crop:
200mm
70mm
Photos are noisy as heck, that's the one detail I forgot, to actually expose correctly. Duh! But still, you can see the 200mm is pretty good, like your examples from your original lens. However, a bit soft at 70mm. I think I've read in other places that the short end isn't this lens' strong point, but was curious to hear if you had comments as well based on your old Sigma.
Try a test atf2.8 (it looks like you used f16). The problem appears mostly when wide-open and is more pronounced off-axis.
I need a lens that works at f2.8 for night and indoor sports, and for events, where I need to work from a distance, with and without flash.
It may be just a bad "batch", because the old lens, from Sigma, works so well wide open, and other folks don't seem to experience the problem.
Just to explain about the old lens, it does have problems with the dRebel XT, namely:
It occasionally locks up the camera, but no error shows.
It has a problem with autofocus in near-to-far focussing situations.
It does not work at any other f-stop than f2.8, and locks the camera with an error when tried.
I did check with Sigma, and the lens is too old to re-chip. Oh well.
To be clear, this hasn't turned me off to Sigma lenses. My 18-50mm, f2.8 is a splendid lens and super value, and I don't intend to replace it, ever. (... Unless it fails, or starts calling me names, or something. : )
Until they are able to afford the 70-200 f/2.8L IS
Honestly, I can't see *any* reason to buy the non-IS Canon, or the 70-200 f/4L Canon. Yes, the Sigma, in my opinion is that good. Of course, I base that on my own experience with an older Sigma that has the unmitigated audacity to trounce every other lens I own that isn't a prime at f/2.8!
So, if the Canon 70-200 f/2.8L IS is out of reach, have no fear, save some cash and pickup the Sigma.
If every keystroke was a shutter press I'd be a pro by now...
Go for the sigma my friend. If you can go from f4.0 to f2.8 for $100 bucks I'd jump on that. I have a Sigma lens and a Sigma flash. Top notch! Love them both.
:
hi scott
apologies if my question is not relevant to the this topic but i am impressed with this date availability thingy,,how did u do that?? here is the link
If you are talking about the difference in performance between these 3 lenses, it's pretty much splitting hairs. Despite the issues Ziggy is having with his Sigma, I've got nothing but great results from mine. Yeah, I'd like to have the ISL, if just for the sealing and the occassional benefit of IS. But, for a mid $700 lens, the Sigma really does ROCK
Your images look great! You got a good copy of that lens.
FWIW, I do like the look of fleshtones better with the Sigma glass than the Canon "L", but the Canon I have, the non-IS version, is just awesome in terms of sharpness and acuity and focus speed.
It did hurt a lot to part with the extra money for the Canon. :cry
i finally have enough money to buy the Canon 70-200 f/4L. now. do i go with a Sigma 70-200 f/2.8, for just 100 more?! or should i go ahead and get the Canon? read many reviews on the sigma and people say its sharp as a tack. is the 2.8 really that much better for what i'll be shooting?? (football games, portraits outside, some wildlife)
Daniel
If you plan to shoot nighttime sports the F4 is useless. Get the Sigma.
Comments
Thanks, but yes, I always use a tripod for tests and a fairly fast shutter speed. I used ISO 200 for these shots. It would appear that this is an example of mis-aligned internal elements and/or internal reflections. The full settings:
File: - C:\My Documents\My Pictures\Canon\Lens_Tests\_MG_5242_smaller.jpg
Make - Canon
Model - Canon EOS DIGITAL REBEL XT
Orientation - Top left
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
DateTime - 2006:02:02 11:04:25
WhitePoint - 0.31
PrimaryChromaticities - 0.64
YCbCrCoefficients - 0.30
YCbCrPositioning - Co-Sited
ExifOffset - 320
ExposureTime - 1/800 seconds
FNumber - 2.80
ExposureProgram - Aperture priority
ISOSpeedRatings - 200
ExifVersion - 220
DateTimeOriginal - 2006:02:02 11:04:25
DateTimeDigitized - 2006:02:02 11:04:25
ComponentsConfiguration - YCbCr
ShutterSpeedValue - 1/800 seconds
ApertureValue - F 2.80
ExposureBiasValue - 0.67
MeteringMode - Partial
Flash - Not fired, compulsory flash mode
FocalLength - 200 mm
UserComment -
FlashPixVersion - 100
ColorSpace - Uncalibrated
ExifImageWidth - 640
ExifImageHeight - 427
InteroperabilityOffset - 9366
FocalPlaneXResolution - 3954.23
FocalPlaneYResolution - 3958.76
FocalPlaneResolutionUnit - Inch
CustomRendered - Normal process
ExposureMode - Auto
WhiteBalance - Auto
SceneCaptureType - Standard
Maker Note (Vendor): -
Macro mode - Normal
Self timer - Off
Quality - Fine
Flash mode - Not fired
Sequence mode - Continous
Focus mode - One-Shot
Image size - Large
Easy shooting mode - Manual
Digital zoom - None
Contrast - Normal
Saturation - Normal
Sharpness - Normal
ISO Value - 32767 (other)
Metering mode - Partial
Focus type - Auto
AF point selected -
Exposure mode - Av-priority
Focal length - 70 - 200 mm
Flash activity - Not fired
Sequence number - 0
White Balance - Auto
Image Type - Canon EOS DIGITAL REBEL XT
Firmware Version - Firmware 1.0.1
Moderator of the Cameras and Accessories forums
ziggy53
Moderator of the Cameras and Accessories forums
200mm
70mm
Photos are noisy as heck, that's the one detail I forgot, to actually expose correctly. Duh! But still, you can see the 200mm is pretty good, like your examples from your original lens. However, a bit soft at 70mm. I think I've read in other places that the short end isn't this lens' strong point, but was curious to hear if you had comments as well based on your old Sigma.
moderator of: The Flea Market [ guidelines ]
Try a test atf2.8 (it looks like you used f16). The problem appears mostly when wide-open and is more pronounced off-axis.
I need a lens that works at f2.8 for night and indoor sports, and for events, where I need to work from a distance, with and without flash.
It may be just a bad "batch", because the old lens, from Sigma, works so well wide open, and other folks don't seem to experience the problem.
Just to explain about the old lens, it does have problems with the dRebel XT, namely:
It occasionally locks up the camera, but no error shows.
It has a problem with autofocus in near-to-far focussing situations.
It does not work at any other f-stop than f2.8, and locks the camera with an error when tried.
I did check with Sigma, and the lens is too old to re-chip. Oh well.
To be clear, this hasn't turned me off to Sigma lenses. My 18-50mm, f2.8 is a splendid lens and super value, and I don't intend to replace it, ever. (... Unless it fails, or starts calling me names, or something.
Best,
ziggy53
Moderator of the Cameras and Accessories forums
to
A Canon 70-200 2.8
then to
Canon 70-200 2.8 IS and Im glad I did.
Owner/Photographer
Expose The Moment
Had a list of gear, now its to long, so lets say I have 2 bags and 15,000 worth of stuff.
Kevin
www.rightangleimages.com
well.
Until they are able to afford the 70-200 f/2.8L IS
Honestly, I can't see *any* reason to buy the non-IS Canon, or the 70-200 f/4L Canon. Yes, the Sigma, in my opinion is that good. Of course, I base that on my own experience with an older Sigma that has the unmitigated audacity to trounce every other lens I own that isn't a prime at f/2.8!
So, if the Canon 70-200 f/2.8L IS is out of reach, have no fear, save some cash and pickup the Sigma.
also, it would seem i'm a bit of a Brand whore
smugmug: www.StandOutphoto.smugmug.com
hi scott
apologies if my question is not relevant to the this topic but i am impressed with this date availability thingy,,how did u do that?? here is the link
http://www.3rdplanetphotography.com/checkavailable.aspx
hope to hear from you
thank you
nonilady
long way to go but getting there:D:ivar:lynnma
http://freezeframephotography.smugmug.com/photos/57128805-O.jpg
http://freezeframephotography.smugmug.com/photos/57128764-O.jpg
Shot at sunset. A "sweet light" shot
http://freezeframephotography.smugmug.com/photos/57128811-O.jpg
Steve
Your images look great! You got a good copy of that lens.
FWIW, I do like the look of fleshtones better with the Sigma glass than the Canon "L", but the Canon I have, the non-IS version, is just awesome in terms of sharpness and acuity and focus speed.
It did hurt a lot to part with the extra money for the Canon. :cry
Best,
ziggy53
Moderator of the Cameras and Accessories forums
If you plan to shoot nighttime sports the F4 is useless. Get the Sigma.
Unsharp at any Speed