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Old Aug 17, 2009, 6:02 PM   #11
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Originally Posted by 2SwiFt29 View Post
Update the firmware on your 50D and see if this helps..
Does the 50D have in camera CA reduction? If that's the case, I suppose a firmware update may help.
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Old Oct 29, 2009, 12:56 AM   #12
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Default purple edges continue

Okay..so assuming that the advice about the "lower-end" lense being the cause of the purple edges in my photos, I avoided using this lense and began to rely on others I own.

AND...I still see this problem. Using both the Canon 50 mm prime and the 85mm prime.

Clunking around looking for answers...I find "sensor bloom" ...is this what's going on?

I will try to update the firmware although when I checked, I believe that my version is the same number as the "update".

Any ideas? Could this be "my" camera problem? It's new enough that the warranty would cover any repairs. Should I take it in? If so, do I take printed photos showing the problem?

Thanks
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Old Oct 29, 2009, 6:58 AM   #13
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Try stopping down your aperture a bit. CA is usually worse with the aperture wide open at it's smallest f/stop value. IOW, instead of shooting at f/1.8 with your 50mm or 85mm lenses, try using f/2 to f/2.8 instead (or even f4 to f/5.6 or so if lighting permits).
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Old Oct 29, 2009, 8:55 AM   #14
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Quote:
Originally Posted by JimC View Post
Try stopping down your aperture a bit. CA is usually worse with the aperture wide open at it's smallest f/stop value. IOW, instead of shooting at f/1.8 with your 50mm or 85mm lenses, try using f/2 to f/2.8 instead (or even f4 to f/5.6 or so if lighting permits).
Jim is right - My EF-50mm f/1.4 has terrible CA in bright light so it's not just your camera... Stopping it down will help
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Old Nov 2, 2009, 9:22 PM   #15
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So...Can anyone help me understand why this shows using the 50D but never showed when same lenses were used with the original Digital Rebel (300D)?

Thanks...just trying to understand!
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Old Nov 3, 2009, 3:14 AM   #16
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Did it work? That will help to answer your question.
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Old Nov 3, 2009, 8:31 AM   #17
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So...Can anyone help me understand why this shows using the 50D but never showed when same lenses were used with the original Digital Rebel (300D)?
Was it used under the same lighting/angle?
-> It should... My EF 50 f/1.4 will do it in both the 10D and 1D MrkII under the right lighting condition (lens wide open in bright and high-contrast areas). Most of the time you would not have noticed it
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Old Nov 3, 2009, 9:26 AM   #18
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Also, stuff like that is more likely to show up, or be more noticeable, in a 12MP image than in an 8MP image. A higher resolution image sensor shows the flaws better too.
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