Do you have to stop down for results from the 1.4 to be sharp? I find it’s somewhat underwhelming wide open despite many reports to the contrary. Even more so with the 2x…
simingx wrote:
Do you have to stop down for results from the 1.4 to be sharp? I find it’s somewhat underwhelming wide open despite many reports to the contrary. Even more so with the 2x…
The addition of the 1.4X TC doesn’t result in IQ loss under real-life conditions. And yes, even at wide open aperture. I am sure if you pixel peep and compare files with and without TC under controlled conditions, there is a difference. The effect using the 2X is more noticeable but still, I wouldn’t hesitate to put the 2X on if the conditions warrant.
simingx wrote:
Do you have to stop down for results from the 1.4 to be sharp? I find it’s somewhat underwhelming wide open despite many reports to the contrary. Even more so with the 2x…
A lot of that is due to atmospheric haze and folks trying to push it in situations that are probably too poor to even photograph. I have the 1.4x almost permanently attached and I am amazed at how sharp it is at 840mm f5.6.
amlsml wrote:
A few from last week, I don't think I have taken the 1.4 off in a while.
Nice shots, Andy. I was going to go to Bombay Hook today for the snow geese but it’s going to be cloudy, maybe next week.
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149113 wrote:
Blow out skies and fog all day. Salvaged a few shots
A1 + 600GM
Nice low level shots! Did you get in the water to get these? I heard that there are currently only dozens of ducks at Oakley Street? I will get a bag of corn to head over there soon.
AGeoJO wrote:
The addition of the 1.4X TC doesn’t result in IQ loss under real-life conditions. And yes, even at wide open aperture. I am sure if you pixel peep and compare files with and without TC under controlled conditions, there is a difference. The effect using the 2X is more noticeable but still, I wouldn’t hesitate to put the 2X on if the conditions warrant.
Joshua show him your Kite with the 2.0+600. Fine by me.
MedicineMan404 wrote:
Joshua show him your Kite with the 2.0+600. Fine by me.
Robert, here are a few images using that combo. The first 2 images are from the days before the A1. I believe that a good camera support would be necessary to get critically sharp images. At an effective FL of 1200mm, handholding your combo can be iffy and that may result in less critically sharp images, in addition to having to deal with adverse atmospheric conditions.
I have the admit that the left eye (from our point of view) of the Vermillion Flycatcher in #1 is not critically sharp under high magnification as the focus plane is more on the forehead or breast of that bird. The kestrel in #2, since it was perching is more critically sharp. The same goes for the toucan barbet in #3 and that one was barely cropped. I did it to show what that combo could pull off. Since the setup was on tripod and the bird barely moved, I lowered the shutter speed to get a more down to earth ISO setting although it was fairly dark while raining. I did take more pictures of that bird in rain using only the 1.4X TC for more "breathing room".
