ISO
- Thread starter mervinlwc
- Start date
Base ISO is not determined by Brand. It is determined by the specific sensor used in that camera.
Sensors in D300, D300s, D90, D5000, Pentax K-x, Sony A500, A550 all have ISO 200 base.
D200, D80, D60, D3000, D40x, D40, D70, D50, D100 all have ISO 100 base.
The coming new D700 has a base ISO of 100.
Please do not make sweeping statements like this before some basic research.
DrSpock
New Member
The thing you must always remember with ISO is it is closely related with Aperture(A) and Shutter Speed(SS). Generally it can be summarise into 4 cases but of course the combination can be thousands.
For slowest possible SS = narrow A + lowest base ISO - eg, use in night scene, bulb mode or landscape shoots, blur waterfall, etc on tripod
Slow to Mid SS = wide A + low ISO - eg, use in outdoor/indoor portrait with shallow DOF, static subject, etc
Mid to high SS = small A + high ISO - eg use in outdoor landscape with subject shooting, panning etc
whereas for fastest SS = widest A + highest ISO - used in sports or indoor/ dim, fast scene, freeze the aeroplane, etc
I always base my shoots on this basic principles
For slowest possible SS = narrow A + lowest base ISO - eg, use in night scene, bulb mode or landscape shoots, blur waterfall, etc on tripod
Slow to Mid SS = wide A + low ISO - eg, use in outdoor/indoor portrait with shallow DOF, static subject, etc
Mid to high SS = small A + high ISO - eg use in outdoor landscape with subject shooting, panning etc
whereas for fastest SS = widest A + highest ISO - used in sports or indoor/ dim, fast scene, freeze the aeroplane, etc
I always base my shoots on this basic principles
The thing you must always remember with ISO is it is closely related with Aperture(A) and Shutter Speed(SS). Generally it can be summarise into 4 cases but of course the combination can be thousands.
For slowest possible SS = narrow A + lowest base ISO - eg, use in night scene, bulb mode or landscape shoots, blur waterfall, etc on tripod
Slow to Mid SS = wide A + low ISO - eg, use in outdoor/indoor portrait with shallow DOF, static subject, etc
Mid to high SS = small A + high ISO - eg use in outdoor landscape with subject shooting, panning etc
whereas for fastest SS = widest A + highest ISO - used in sports or indoor/ dim, fast scene, freeze the aeroplane, etc
I always base my shoots on this basic principles
Hey thanks a lot!
Override2Zion
Senior Member
D60, D40x, D3000, D200 and D80 are all using the same CCD sensor with a base ISO of 100. So if you want best IQ, stick to ISO100, especially when doing long exposures.
Different ISO Condition
Using Higher ISO - increase the light sensitivity, It is useful in low light condition but it will increase in grain and noise in your photo.
Using Lower ISO - Less light sensitivity, It is useful in bright area. can achieve high EQ in your photo.
Recommendation - always try to use the lower ISO if possible but if seriously cannot then use higher ISO to compensate for the lost light.
Lastly just remember this phase "It better to have noise and grain then having a blur photo"
Using Higher ISO - increase the light sensitivity, It is useful in low light condition but it will increase in grain and noise in your photo.
Using Lower ISO - Less light sensitivity, It is useful in bright area. can achieve high EQ in your photo.
Recommendation - always try to use the lower ISO if possible but if seriously cannot then use higher ISO to compensate for the lost light.
Lastly just remember this phase "It better to have noise and grain then having a blur photo"
zac08
Senior Member
as said : When you go below, you may lose out on contrast. Note that such ranges below the base ranges, the camera reduces the signals received by the camera sensor and thus this will cause loss of the dynamic range.
If you do that, you will actually lose details and dynamic range.
