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Old Jan 12, 2008, 6:30 PM   #1
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still trying to work the kinks out with the 100-400L... a it noisier than i'd like, even at ISO 800 with the 40D...

a bushtit...





and a very plain sparrow...


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Old Jan 12, 2008, 6:35 PM   #2
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I like them but the last is my favorite.


Wacky roger
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Old Jan 12, 2008, 6:47 PM   #3
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Quote:
still trying to work the kinks out with the 100-400L... a it noisier than i'd like, even at ISO 800 with the 40D...
Fine work, Squirl, you should pat yourself on the back for getting something worthy from this twist of vegetation surrounding the subject, excellent stuff. I am going to suggest something to you with respect to the 100-400 performance and "working out the kinks", hope you don't mind. These shots are extremely difficult because of the potential for the camera to be focusing slightly on a twig here or a leaf there. In order to check out focus potential on the lens perhaps you might consider a less busy background? You have done a super job getting the subject in this busy cluster of vegetation. I'm impressed.
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Old Jan 12, 2008, 7:52 PM   #4
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thanks, Norm... i use only the center AF point specifically to reduce the odds of the AF system grabbing the wrong thing, but i've alsotriedthis lenson numerous "out in the open" subjects, and it still seems to be a bit suspect. then again, i haven't really had good light here since October, so it's possibly a bit premature to condemn the lens outright... it may just need brighter light. than the Sigma does to effect a solid focus...
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Old Jan 12, 2008, 10:13 PM   #5
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I wouldn't criticize the lens for that first shot - catching a Bushtit in midflight is an accomplishment enough, even is it isn't tack sharp - those little buggers are fast. The Fox Sparrow was a lot more cooperative, though.

How can you hold a lens responsible for digital noise - isn't the camera's processorresponsible for that?
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Old Jan 12, 2008, 10:32 PM   #6
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Those are nice, I like the second on, seems like it is falling asleep.

Tom
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Old Jan 13, 2008, 12:26 AM   #7
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penolta wrote:
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I wouldn't criticize the lens for that first shot - catching a Bushtit in midflight is an accomplishment enough, even is it isn't tack sharp - those little buggers are fast. The Fox Sparrow was a lot more cooperative, though.

How can you hold a lens responsible for digital noise - isn't the camera's processorresponsible for that?
i don't blame the lens for noise... that's the sensor. i had just thought the 40D was a bit better than that at high ISO... i've been having some focusing issues with the lens, and i'm trying to determine whether it's the lens itself, or just crappy light... no AF system works well in the gray, dreary light we have here most of the winter, but this lens seems to have some issues even in what passes for sunlight here this time of year... maybe i'll just have to wait till spring to see if it's working right...
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Old Jan 13, 2008, 7:24 AM   #8
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Forrest Gump would say......"Drab is as drab does." Considering the light and the amount of distracting material, I think you have taken some extremely strong shots.

If you're using AF in an enviornment with that many distractions, particularly with very small birds such as a bushtit, then I think you're AF is performing extremely well, especially if lighting is bad. In similar settings, I have to forgo AF completely to make sure I'm focusing on my intended target. There's just not enough contrast for the sensor to make a focus lock.

I would say "well done."
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Old Jan 13, 2008, 8:27 AM   #9
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Greatcapture of a difficult subject in frame #1 Squirl! Do you shoot in Jpeg or Raw and have you tried the lens with IS ON then OFF on the same shot?

-Kent
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Old Jan 13, 2008, 11:35 AM   #10
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These are pretty good Rocky. I like the bush tits. I'm always chasing these little bu__ers around without much luck.

I've shot some shots with my buddy's 100-400, and found it a little softer than my 300 f/4. It also focused a little slower, but not much. Maybe your copy needs a calibration? It is possible. From what I've read about Canon's QC, there is a small chance it could be out of whack. Maybe switching to a prime lens is the answer. They are definitely sharper than zooms.

About the noise in the 40d. I imagine it isn't too much different that the 30 and 20d's at high ISO. You can only conceal so much noise via a cameras processor without smearing out detail. Have you tried a NR program? I use a plug in in CS2 that Mike recommended, and it is excellent. http://www.imagenomic.com/download.aspx They have a freebie if you want, or you can pay for a more extensive version. They all work well....cheers...Don
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