Liquidstone wrote:
Arash, what\'s your opinion on the AI servo speed of the following combos?
On paper, for BIF shooting, it seems to me that IQ is a wash (if the 7DII is shot at 1 stop lower ISO), 7D II is longer/lighter/cheaper with more selectable AF points, while the 1Dx is 2 fps faster.
7D MII + 400 DO II + 1.4x TC III:
- 20 MP + AOV of 900ish mm at f/5.6
- All AF points selectable
- noisier pixels offset by 1 stop brightness edge
- 10 fps
- lighter/cheaper
1Dx + 400 DO II + 2x TC III:
- 18 MP + AOV of 800 mm at f/8
- Only center AF point group selectable
- 12 fps
Hi Romy,
For me the 7D2 has never worked well so I don\'t recommend it personally. The AF wasn\'t accurate in my experience for flight, I tried 3 different bodies and got mixed results with them. But my standards might be different than other folks, especially the sharpness that I like to see in my RAW files.
The center only point + 4 expansion could be limiting in some situations, examples capturing a small owl in flight. As for servo drive when I compare the two side-by-side the 1D X is slightly faster with the 2X compared to 7D2 plus 1.4X with my 400 DO II. As Chuck mentioned the 7D2 slows down the drive arbitrarily when an extender is added. But keep in mind AF drive speed ins\'t everything when it comes to tracking BIF. The 400 DO + 2X III is a great combo but I doesn\'t replace my main flight rig that is the 600 II.
Liquidstone wrote:
Arash, what\'s your opinion on the AI servo speed of the following combos?
On paper, for BIF shooting, it seems to me that IQ is a wash (if the 7DII is shot at 1 stop lower ISO), 7D II is longer/lighter/cheaper with more selectable AF points, while the 1Dx is 2 fps faster.
7D MII + 400 DO II + 1.4x TC III:
- 20 MP + AOV of 900ish mm at f/5.6
- All AF points selectable
- noisier pixels offset by 1 stop brightness edge
- 10 fps
- lighter/cheaper
1Dx + 400 DO II + 2x TC III:
- 18 MP + AOV of 800 mm at f/8
- Only center AF point group selectable
- 12 fps
Hi Romy,
For me the 7D2 has never worked well so I don\'t recommend it personally. The AF wasn\'t accurate in my experience for flight, I tried 3 different bodies and got mixed results with them. But my standards might be different than other folks, especially the sharpness that I like to see in my RAW files.
The center only point + 4 expansion could be limiting in some situations, examples capturing a small owl in flight. As for servo drive when I compare the two side-by-side the 1D X is slightly faster with the 2X compared to 7D2 plus 1.4X. As Chuck mentioned the 7D2 slows down the drive when an extender is added. But keep in mind AF drive speed ins\'t everything when it comes to tracking BIF. The 400 DO + 2X III is a great combo but I doesn\'t replace my main flight rig that is the 600 II.
Liquidstone wrote:
Arash, what\'s your opinion on the AI servo speed of the following combos?
On paper, for BIF shooting, it seems to me that IQ is a wash (if the 7DII is shot at 1 stop lower ISO), 7D II is longer/lighter/cheaper with more selectable AF points, while the 1Dx is 2 fps faster.
7D MII + 400 DO II + 1.4x TC III:
- 20 MP + AOV of 900ish mm at f/5.6
- All AF points selectable
- noisier pixels offset by 1 stop brightness edge
- 10 fps
- lighter/cheaper
1Dx + 400 DO II + 2x TC III:
- 18 MP + AOV of 800 mm at f/8
- Only center AF point group selectable
- 12 fps
Hi Romy,
For me the 7D2 has never worked well so I don\'t recommend it personally. The AF wasn\'t accurate in my experience for flight, I tried 3 different bodies and got mixed results with them. But my standards might be different than other folks, especially the sharpness that I like to see in my RAW files.
The center only point + 4 expansion could be limiting in some situations, and the AF drive speed ins\'t everything when it comes to tracking BIF. The 400 DO + 2X III is a great combo but I doesn\'t replace my main flight rig that is the 600 II.
best
Oct 08, 2015 at 11:06 AM
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