49
F. ISO, Gain and Dual ISO
F4. When to switch to Hi Base ISO?
RECOMMENDATION:
I suggest that whenever you add
more than +8dB of gain in the Low Base ISO mode you
should switch over to Hi Base ISO for a picture with less
noise. I strongly advise that you should never add more
than +14 dB of gain in the Low Base ISO mode as this
much gain adds a lot of extra noise. You are better of
selecting Hi Base ISO as this produces an image of the
same brightness but without such a significant noise
increase. Please refer to the table below.
Gamma
Lo Base
Lowest
Suggest
Switch to Hi
Base
Always
switch to Hi
Base for best
results
Lo Base
Highest ISO
don’t use,
use hi base
instead
High Base
Lowest
High Base
Highest ISO
S-Cinetone
STD Gamma
HG1 - HG4
320 ISO
0dB
800 ISO
+8dB
1600 ISO
+14dB
2500 ISO
+18dB
1600 ISO
0dB
12800 ISO
+18dB
HG7, HG8
500 ISO
0dB
1250 ISO
+8dB
2500 ISO
+14dB
4000 ISO
+18dB
2500 ISO
0dB
20000 ISO
+18dB
S-Log3
800 ISO
0dB
2000 ISO
+8dB
4000 ISO
+14dB
6400 ISO
+18dB
4000 ISO
0dB
32000 ISO
+18dB