Instruction manual

Instruction Manual Roundshot D3 - version 4.05 – May 2013 - © by Seitz Phototechnik AG / Switzerland www.roundshot.ch page 66
4.6 … compute the capture time
Capture
speed
Image
format
Capture
time
x
=
Capture time is the amount of time required to complete the scan for a given image
format and capture speed (set by the exposure speed). It is calculated by multiplying
the read-out speed per pixel by the number of horizontal pixels in the image:
To take the example of the 35mm and 80mm focal lengths again:
35mm: 1.4 seconds
80mm: 3.1 seconds
These are minimum capture times (under daylight lighting conditions).
4.7 … minimise noise at image capture
To minimise noise it is recommendable to use a faster exposure. A faster exposure
allows faster integration times (TDI sensor) which minimises the creation of noise.
ISO/ASA (gain) amplifies the output signal and multiplies the noise in the image.
Therefore it is recommendable to select a low ISO/ASA setting.