I have yet to find a lens that won't produce purple fringe when tree  
branches are shot against a white sky. I think it's a sensor thing.
Paul
On Feb 17, 2008, at 7:41 AM, Carlos Royo wrote:

> Roman Melihhov escribió:
>> http://www.photozone.de/Reviews/Pentax%20Lens%20Tests/370-pentax- 
>> smc-da-200mm-f28-ed-if-sdm
>>
>> ^^^ CA is awful. For the lense I'd use for nature photography seeing
>> purple fringe around tree branches is a big NO.
>>
>
> AFAIK, that's not CA, it is purple fringing. Perhaps it has more to do
> with the sensor than with the lens.
>
> Carlos
>
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