Lately, I've been using my vintage manual lenses for backyard bird and critter pics. For birds, I've been using my 180 f/2.8 P.C AI'd mounted on my modified TC-16A for fine focus, and for critters 5 ft or closer, the 55 f/3.5 P.C, also with the TC-16A. The 55 f/3.5 gave me a ton of keepers - my...