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ISO 100 Vs. ISO 400
This subject is now featured inVolume 1,  Number 1of The Luminous Landscape Video Journal. 
How Much Do you Lose at ISO 400?
The D30's imaging chip has a native speed of ISO 100. It can also be set to speeds of 200, 400, 800 and 1600. Early tests by Phil Askey atDigital Photography Reviewappeared to indicate that pretty good results can be had at up to 400. Above that is for emergencies only if optimum image quality is desired.
I was curious to see how 100 and 400 speeds would compare for the type of shooting that I primarily do, landscape and nature. Since I shoot 90% of the time on a tripod ISO 100 is the speed that I normally use. For handheld work, particularly for wildlife, ISO 400 is sometimes required andsome teststhat I did last year of ISO 400 transparency films, and pushing, showed me that none of the alternatives are particularly attractive.
The idea of having a camera that can change sensitivity with the flick of a switch was appealing in...

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Michael Reichmann
Michael Reichmann
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Michael Reichmann is the founder of the Luminous Landscape. Michael passed away in May 2016. Since its inception in 1999 LuLa has become the world's largest site devoted to the art, craft, and technology of photography. Each month more than one million people from every country on the globe visit LuLa.
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