It's more likely to be due to difference in the the IR-block filter
in the two cameras. Sounds like the D200 has a more tightly
controlled IR block.
Godfrey
On Apr 18, 2006, at 5:09 AM, David J Brooks wrote:
Small experiment done the other day.
Shot some IR with the istD, 16-45 F4 and the R72. At iso 1600 in M
mode, i was shooting around 1/30 F4 and getting a decently exposed
shot. Histo more or less in the centre.
Yesterday, using the D200, 35-70 F2.8, M mode and R72 filter. To
get similar results at iso 1600, i had to shoot at 2 sec at F4.
Could this be due to the sensitivity differnce of the two sensors.
Just curious
Dave
Equine Photography in York Region
