Sony A900 - Alpha 24.6MP DSLR Camera Manual - Página 24
Procurar online ou descarregar pdf Manual para Câmara digital Sony A900 - Alpha 24.6MP DSLR Camera. Sony A900 - Alpha 24.6MP DSLR Camera 25 páginas. Astrophotography
Também para Sony A900 - Alpha 24.6MP DSLR Camera: Características Manual (3 páginas)
Imprimir página
•
EXPOSURE
Raising the ISO setting amplifies the gain on the sensor, it does not increase the sensor's Quantum Efficiency.
Amplifying the signal increases the random noise, which for each photosite is a fixed proportion of the well depth, at
any particular temperature. The Exmor CMOS sensor's ISO range extends from ISO100 to ISO6400. The native
sensitivity of the sensor is ISO100. Sensor noise affects the sensor's resolution and so does shooting jpegs. For the
best resolution you should always shoot raw frames @ ISO100 to ISO800. Do not set ISO to <AUTO>.
-
ISO SETTING & RESOLUTION
The Sony a900 ISO range is ISO100 to
ISO6400. The ISO setting merely amplifies
the photosite electron count, it does not
increase the (QE) of the sensor, and the
amplification greatly increases random
noise. Below ISO800 noise is acceptable,
and can be handled either in camera or post
exposure. Faster than ISO800 the Exmor
CMOS sensor noise becomes intrusive and
above ISO3200 objectionable. Unless there
are compelling reasons ISO100 to ISO800
should be selected. On no account use the
<ISO RANGE><AUTO> option. It is
advantageous to minimize seeing effects
during short exposures to increase the ISO
rating and reduce the exposure time
concomitantly. For exposure times shorter
than 1/100s set ISO100.