05-10-2012, 05:22 AM
[quote name='Frank' timestamp='1336623839' post='18090']
As far as I know low 1 corresponds to iso 100, low 0.7 and 0.3 correspond to values between 100 and 200: something like 125 and 175 respectively (I don't remember exactly). So, on D5000 the lowest iso is also 100, just 1 stop from the base iso 200 (low 1: 1 stop from 200; low 0.7: 2/3 stop from 200; 0.3: 1/3 stop from 200). If you are serious about long-time exposure in bright light, the low iso is definitely not enough.
In addition, usually low iso cannot be applied to a scene with high contrast since it tends to cut off the highlight.
Frank
[/quote]
Ok, that make more sense, I always taka care to not clip higlight . From what I understand , Those setting can allow me to "increase" the filter effect if the scen is suited for it.
Thank again for a new tip to increase my photography skill.
As far as I know low 1 corresponds to iso 100, low 0.7 and 0.3 correspond to values between 100 and 200: something like 125 and 175 respectively (I don't remember exactly). So, on D5000 the lowest iso is also 100, just 1 stop from the base iso 200 (low 1: 1 stop from 200; low 0.7: 2/3 stop from 200; 0.3: 1/3 stop from 200). If you are serious about long-time exposure in bright light, the low iso is definitely not enough.
In addition, usually low iso cannot be applied to a scene with high contrast since it tends to cut off the highlight.
Frank
[/quote]
Ok, that make more sense, I always taka care to not clip higlight . From what I understand , Those setting can allow me to "increase" the filter effect if the scen is suited for it.
Thank again for a new tip to increase my photography skill.