cstewart wrote in post #9800274
Looks pretty good with not too much IQ loss. It would be interesting to see a comparison of an image shot with both TCs (i.e. above image) with one shot with only the 1.4, one with only the 2.0 and one with none (and then cropped to the same composition) to really see any IQ differences. What was your ultimate f-stop with this combo?
I agree. Very usable image in my opinion after some post processing. I do have some of Prince with just the 300mm and I can post one later with the same comp.
As other have said, ultimate f-stop was f/8.
folville wrote in post #9800932
The camera always focuses at the max aperture, doesn't it? So, wouldn't that mean that no matter what aperture he shot at, as long as the system could go to f/8, autofocus would be possible?
Actually, the exif says this was shot at f/8, so it's moot. It also says the focal length was 600mm: do stacked TCs not register?
From the exif and my experience in the field, the 1.4 TC isn't registered when stacked with the 2x TC. My camera settings actually read f-5.6 with them stacked and I had to adjust it to f-8; the camera didn't figure it out on its own.
The shot was taken handheld, 1/640 SS with IS on.
MkII x 2 | Rebel XT | EF-S 18-55mm 3.5-5.6 | 17-40mm 4 L | 50mm 1.8 | 85mm 1.8 | 70-200mm 2.8L | 300 2.8L IS | 1.4x & 2x TCs | Lowepro Slingshot 300 AW | 580ex II
Four Seam Images