Here's some from a strange looking pea-green Sigma MF 400mm f/5.6 lens. It's a very nice size for carrying around and not too dark for a 400mm prime I think - f/5.6.
1/125s, ISO500, F/5.6, Dec. 20th, 5:30 in the evening. GH1
1/160s, ISO1600, Mid August at 4:30pm, GH1, This is using a crappy 67mm(ø) close-up filter I have left over from my video daze.
1/100s, ISO500, F/5.6, Dec. 20th, 5:30 in the evening. GH1
Couple of years ago,wanted to see if I could actually focus with the standard viewfinder screen in the 50D at far distances...
This convinced me I didn't need a Katz eye third party or any of Canon's precision focusing screens.
I would sure appreciate it if you posted in-line images. I know I'm not the only one who dislikes going off-site as I've seen others complain about it before too. Most people (including me) just skip it and then never get to see your images.
I posted some garden bird photos in the nature and wildlife forum earlier this week. Apart from the blackbird, which was shot with a Tamron 180mm macro, all were shot with the Sigma 500mm f/4.5 APO EX DG HSM:
Point, Focus, Pray, And press the shutter button! 
