Nikon D700 + Sigma “Bigma” 50-500mm OS @ 1000 mm — 1/1000 sec, f/13, ISO 1400 — full exif
Sigma “Bigma” 50-500mm OS + Sigma 2.0X Teleconverter
I've been busy busy busy with Lightroom plugin stuff and so haven't gotten much time to play with my new Sigma “Bigma” 50-500mm superzoom, but I wanted to post a few samples taken with the Sigma APO Teleconverter 2x EX DG attached, turning the Bigma into a 100-1,000mm f/9-f/13 zoom.
These aren't from a proper test... I just set the camera+teleconverter+lens's substantial mass on a table and pointed it out the open window, turned the lens' optical stabilization off, and fired off some shots....
Nikon D700 + Sigma “Bigma” 50-500mm OS @ 1000 mm — 1/1000 sec, f/13, ISO 1600 — full exif
a fair bit mushy
Nikon D700 + Sigma “Bigma” 50-500mm OS @ 1000 mm — 1/125 sec, f/64, ISO 4000 — full exif
extremely mushy, but what do you expect at f/64?
The viewfinder was surprisingly bright for f/9, though the out-of-focus areas had all kinds of annoying chromatic aberration when viewed through the viewfinder.... but not, thankfully, in the photos themselves.
A Nikon D700 does not autofocus a lens whose maximum aperture is smaller than f/5.6, so with the teleconverter it turns into a manual-focus only lens.
Still, I took the opportunity for some guy crossing the little bridge I can see from my window (seen at 200mm in the first shot of this post) to try an optical-stabilization-assisted on-the-fly shot, and all things considered, it came out okay...
Nikon D700 + Sigma “Bigma” 50-500mm OS @ 1000 mm — 1/1000 sec, f/13, ISO 2500 — full exif
As a bonus, the teleconverter turns the lens into an almost true macro, at 0.64× magnification. I'll have to give that a try soon.
Nikon D700 + Sigma “Bigma” 50-500mm OS @ 500 mm — 1/400 sec, f/6.3, ISO 400 — full exif
( seems a bit fuzzy to me... maybe it's the subject? )