best iso question

[stacibeth]

When shooting architecture or interiors what is the best iso to shoot at for the least amount of noise?

[LoisWakeman]

The lowest ISO is (AFAIK) always the least noisy, but you have to trade off inherent high-ISO noise vs the noise you get from long exposures at low ISO.

Since digital is almost free to try - why not test this for yourself with your camera and lenses, so you can find the optimum solution for yourself? You'll get much better answers that way.

Also have a look at the long thread in the forum about a noise removal technique.

[Guillermo Luijk]

Architecture & Interiors = tripod + lowest electronic ISO

The lowest electronic ISO means native ISO values, no software post-adjust. Typically is ISO100 in Canons, ISO200 Nikons and Sony.

The problem is that if your scene has a high dynamic range (for instance windows through which you want to preserve the information unblown), you can get noise in the shadows even if lowest ISO is used and a good degree of exposure is achieved.

Those cases are perfect for blending images with different exposure values expanding the DR.

This scene was shot 2 times 4EV apart. The highlights outside were saved, but the darker inner areas have no noise at all:




With just one shot we would have got to chose: low noise in shadows (left), preserve the outside (right):




since the DR of the scene is around 11 f-stops and my camera can only capture 8.

[n1r0t]

The lowest electronic ISO means native ISO values, no software post-adjust. Typically is ISO100 in Canons, ISO200 Nikons and Sony.

Very true! I believe the Nikon D3 has ISO's than 200, but 200 is the NATIVE ISO even though the ISO rating goes "lower".

[duraace]

Architecture & Interiors = tripod + lowest electronic ISO

The lowest electronic ISO means native ISO values, no software post-adjust. Typically is ISO100 in Canons, ISO200 Nikons and Sony.

The problem is that if your scene has a high dynamic range (for instance windows through which you want to preserve the information unblown), you can get noise in the shadows even if lowest ISO is used and a good degree of exposure is achieved.

Those cases are perfect for blending images with different exposure values expanding the DR.

This scene was shot 2 times 4EV apart. The highlights outside were saved, but the darker inner areas have no noise at all:


With just one shot we would have got to chose: low noise in shadows (left), preserve the outside (right):



What software did you use to combine into an HDR?


since the DR of the scene is around 11 f-stops and my camera can only capture 8.
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