Hello friends (especially AlanF and usern4cr)
I've been following threads comparing the RF 100-500 with and without the RF 1.4x, with the RF 800/11, as well as threads elsewhere. Shooting from the same distance with an R5 I expected that the resolution of the RF 100-500 would be better with the RF 1.4x. I just received a new RF 1.4x and after shooting a few tests, I was surprised to find the RF 100-500 performed better when cropped than with the RF 1.4x. I wonder if there is a problem with my testing or if my RF 1.4x is somehow substandard. Your thoughts would be appreciated.
I shot a test chart and a toy penguin at about 10m in bright sunshine, the test chart on a sturdy carbon fibre tripod with 2 second delay with manual focusing; the penguin by hand kneeling ont the ground using EFCS and eye tracking (a real world situation) . My first trial using electronic first curtain shutter suggested possible vibration, so I repeated the test chart photos with electronic shutter. The photos were both processed in DXO Pure Raw2.
Comparing the test chart in Lightroom with the 500mm photo at 150% and the 700mm photo at 107% showed the 700mm photo to be softer. This improved when I added quite a bit of clarity.
The penguin photos when viewed at 196% and 143% (for the 500mm and 700mm) showed similar levels of detail.
The first photo shows the test target and penguin at 500mm uncropped.
The second shows the test target viewed at 150 and 107%.
The third photo as with #2 but added clarity in the 700mm photo.
The final photo shows the penguins viewed at 196% and 143% with no additional editing.
Your thoughts please!
I've been following threads comparing the RF 100-500 with and without the RF 1.4x, with the RF 800/11, as well as threads elsewhere. Shooting from the same distance with an R5 I expected that the resolution of the RF 100-500 would be better with the RF 1.4x. I just received a new RF 1.4x and after shooting a few tests, I was surprised to find the RF 100-500 performed better when cropped than with the RF 1.4x. I wonder if there is a problem with my testing or if my RF 1.4x is somehow substandard. Your thoughts would be appreciated.
I shot a test chart and a toy penguin at about 10m in bright sunshine, the test chart on a sturdy carbon fibre tripod with 2 second delay with manual focusing; the penguin by hand kneeling ont the ground using EFCS and eye tracking (a real world situation) . My first trial using electronic first curtain shutter suggested possible vibration, so I repeated the test chart photos with electronic shutter. The photos were both processed in DXO Pure Raw2.
Comparing the test chart in Lightroom with the 500mm photo at 150% and the 700mm photo at 107% showed the 700mm photo to be softer. This improved when I added quite a bit of clarity.
The penguin photos when viewed at 196% and 143% (for the 500mm and 700mm) showed similar levels of detail.
The first photo shows the test target and penguin at 500mm uncropped.
The second shows the test target viewed at 150 and 107%.
The third photo as with #2 but added clarity in the 700mm photo.
The final photo shows the penguins viewed at 196% and 143% with no additional editing.
Your thoughts please!