I would like to add a lens to my K100d for taking pictures of birds at the feeder in my back yard. I currently have a SMC FA 80-200 which is not quite long enough. I am thinking about these two lenses:
Sigma 70-300mm f4 DG APO Macro
Tamron AF70-300mm f4 DI LD Macro
I have read these two lenses are pretty close in quality and features. But I've read that the Tamron may have some issues with "purple" in the high contrast areas at 300mm. Since most of the shots I'd take would be near 300mm, any suggestions? Does the Sigma have the same issues?
PS, I'd love to go with a longer lens, but haven't had any luck finding one I can afford......$200 is about tops.
Thanks.
Last edited by Papersniper; 11-07-2007 at 07:16 AM.