01-24-2012, 07:20 AM
[quote name='joachim' timestamp='1327388191' post='15177']
On the nex 7 vs 5 what do absolute numbers look like? Say a lens can only do 1500 lph resolution. At some point that must result to the same results whenever a sensor with a resolution much better than this is used.
You are suspecting minor sensor movements with IBS cameras? What are typical exposure times you are using? Ever considered.using flash?
Thanks
Joachim
[/quote]
It all depends on the conversion parameters, of course, but the E 30mm shows about 3500+ LW/PH in the center at f/3.5 whereas the corners are down to 1500 LW/PH. That alone may not be worrisome but even the peak isn't impressive at about 2300 LW/PH for the borders/corners (vs 3900 LW/PH for the center). The lens has "fairly" high CAs which may dampen the results a bit. The curve remains highly suspicious in any case.
Observations:
While I haven't tested it formally I can confidently state that the GH-2 sensor is capable of delivering tack sharp results to the very edges. The Nikon V1 is also fine as far as Markus can tell. Possibly because the sensor is comparatively small compared to comparatively big lenses ?
The Samsung NX200 sensor shows no suspicious results either but the mount-to-sensor distance is also bigger here.
The upcoming Fuji X-Pro 1 has a very shallow register distance and the results from the 18/2 are also discouraging.
I'm still in the "tuning phase" which is why I haven't released any tests during the last weeks - therefore take all this with a grain of salt at this stage.
On the nex 7 vs 5 what do absolute numbers look like? Say a lens can only do 1500 lph resolution. At some point that must result to the same results whenever a sensor with a resolution much better than this is used.
You are suspecting minor sensor movements with IBS cameras? What are typical exposure times you are using? Ever considered.using flash?
Thanks
Joachim
[/quote]
It all depends on the conversion parameters, of course, but the E 30mm shows about 3500+ LW/PH in the center at f/3.5 whereas the corners are down to 1500 LW/PH. That alone may not be worrisome but even the peak isn't impressive at about 2300 LW/PH for the borders/corners (vs 3900 LW/PH for the center). The lens has "fairly" high CAs which may dampen the results a bit. The curve remains highly suspicious in any case.
Observations:
While I haven't tested it formally I can confidently state that the GH-2 sensor is capable of delivering tack sharp results to the very edges. The Nikon V1 is also fine as far as Markus can tell. Possibly because the sensor is comparatively small compared to comparatively big lenses ?
The Samsung NX200 sensor shows no suspicious results either but the mount-to-sensor distance is also bigger here.
The upcoming Fuji X-Pro 1 has a very shallow register distance and the results from the 18/2 are also discouraging.
I'm still in the "tuning phase" which is why I haven't released any tests during the last weeks - therefore take all this with a grain of salt at this stage.