First of all, welcome on board and thanks for your kind words.
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']
The first is that D90 and higher level Nikon cameras can't actually get the camera to go wider f 2.8 or 2.4. Supposedly the problem was due to a failure of the camera to properly turn the aperture lever.[/quote]
Interesting thought. I will check this tonight.
Certainly would explain why shots at f/2 are even more underexposed than with other apertures.
However, also note that the lens alway reports effective aperture (like most macro lenses with Nikon mount). For closer focus, the maximum effective aperture decreases, so at usual portrait distances f/2 will already be unavailable. However, that's just the numercial value, the aperture is still wide open, even though the aperture value changes with closer focus. Effective aperture deals with exposure, not with DOF.
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']
The second problem, which is a less big deal, is that it consistently underexposes on some cameras.[/quote]
Not sure if "some" is correct. It certainly applies to all Nikon DSLRs I've tried the lens with, which as of today is (hope I remember them all correctly): D40, D40x, D80, D90, D200, D300, D300s, S5, D700, D3, D3x (FX cameras in DX mode, of course).
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']Do you know if these issues have been resolved? Do you know if there are fixes or anything?[/quote]
I haven't heard of any solution. A lens I tried in a store just recently still had the issue, but I don't know if this was old stock or a recently delivered one.
-- Markus
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']
The first is that D90 and higher level Nikon cameras can't actually get the camera to go wider f 2.8 or 2.4. Supposedly the problem was due to a failure of the camera to properly turn the aperture lever.[/quote]
Interesting thought. I will check this tonight.
Certainly would explain why shots at f/2 are even more underexposed than with other apertures.
However, also note that the lens alway reports effective aperture (like most macro lenses with Nikon mount). For closer focus, the maximum effective aperture decreases, so at usual portrait distances f/2 will already be unavailable. However, that's just the numercial value, the aperture is still wide open, even though the aperture value changes with closer focus. Effective aperture deals with exposure, not with DOF.
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']
The second problem, which is a less big deal, is that it consistently underexposes on some cameras.[/quote]
Not sure if "some" is correct. It certainly applies to all Nikon DSLRs I've tried the lens with, which as of today is (hope I remember them all correctly): D40, D40x, D80, D90, D200, D300, D300s, S5, D700, D3, D3x (FX cameras in DX mode, of course).
[quote name='vc13130' date='14 June 2010 - 04:14 AM' timestamp='1276485247' post='480']Do you know if these issues have been resolved? Do you know if there are fixes or anything?[/quote]
I haven't heard of any solution. A lens I tried in a store just recently still had the issue, but I don't know if this was old stock or a recently delivered one.
-- Markus
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