I'm trying to download the trial version of DxO FilmPack 5, but I can't install because it says my operating system (Windows Vista) isn't compatible. Anybody else have this problem?

Also, what do you think about DxO FilmPack? Is it worth time and effort to integrate into workflow for Lightroom and/or Photoshop?

Thanks.

You might want to consider the Panasonic 45-200mm f/4.0-5.6 Lumix G Vario MEGA OIS Zoom, if you have a MFT camera. It's modestly priced -- <$300 on Amazon now and has terrific reach. I have the Panasonic 35-100 and it works great on my OMD EM5, but I'm not a birder. Having used a friend's 45-200, I'd guess it would meet your needs pretty well. Best of luck.