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I shoot with the EOS 6D, 70-200mm f/2.8 IS II and an 2X extender III. I've found sharpness to be satisfactory, but the reduction in autofocus speed has been problematic in some situations.

Birds in flight are often out of the question unless they're soaring slowly. I would thingthink airplanes would be fine, given their flight patterns are far less erratic, except for one other thing I've found;found: it will just randomly hunt for focus at times. It might nail 20 shootsshots in a row, and then suddenly fail to lock on to anything for 3 or 4 seconds, sometimes longer.

If you're a hobbyist who doesn't mind missing the odd shot, I wouldn't worry too much. personallyPersonally, I wish I had saved my money on buying the TC, waited a bit longer and bought a 400 f5.6 prime.

I shoot with the EOS 6D, 70-200mm f/2.8 IS II and an 2X extender III. I've found sharpness to be satisfactory, but the reduction in autofocus speed has been problematic in some situations.

Birds in flight are often out of the question unless they're soaring slowly. I would thing airplanes would be fine, given their flight patterns are far less erratic, except for one other thing I've found; it will just randomly hunt for focus at times. It might nail 20 shoots in a row, and then suddenly fail to lock on to anything for 3 or 4 seconds, sometimes longer.

If you're a hobbyist who doesn't mind missing the odd shot, I wouldn't worry too much. personally, I wish I had saved my money on buying the TC, waited a bit longer and bought a 400 f5.6 prime.

I shoot with the EOS 6D, 70-200mm f/2.8 IS II and an 2X extender III. I've found sharpness to be satisfactory, but the reduction in autofocus speed has been problematic in some situations.

Birds in flight are often out of the question unless they're soaring slowly. I would think airplanes would be fine, given their flight patterns are far less erratic, except for one other thing I've found: it will just randomly hunt for focus at times. It might nail 20 shots in a row, and then suddenly fail to lock on to anything for 3 or 4 seconds, sometimes longer.

If you're a hobbyist who doesn't mind missing the odd shot, I wouldn't worry too much. Personally, I wish I had saved my money on buying the TC, waited a bit longer and bought a 400 f5.6 prime.

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source | link

I shoot with the EOS 6D, 70-200mm f/2.8 IS II and an 2X extender III. I've found sharpness to be satisfactory, but the reduction in autofocus speed has been problematic in some situations.

Birds in flight are often out of the question unless they're soaring slowly. I would thing airplanes would be fine, given their flight patterns are far less erratic, except for one other thing I've found; it will just randomly hunt for focus at times. It might nail 20 shoots in a row, and then suddenly fail to lock on to anything for 3 or 4 seconds, sometimes longer.

If you're a hobbyist who doesn't mind missing the odd shot, I wouldn't worry too much. personally, I wish I had saved my money on buying the TC, waited a bit longer and bought a 400 f5.6 prime.