4.4 … compute the capture time
Capture
speed
Image
Format
(21,250 px)
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:
For the fastest capture speed the resulting minimal capture time is 1 second.
4.5 … minimise noise at image capture
To minimise noise it is recommendable to use a higher amount of TDI Stages and a
faster exposure. Using a higher number of TDI Stages averages the black level noise and
leads to an overall better noise behaviour. A faster exposure allows faster integration
times (TDI sensor) which minimises the creation of noise.
When using extreme wide-angle (fisheye) lenses it is recommendable to select less TDI
Stages as for these lenses less TDI Stages allows better sharpness.
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.
Instruction Manual Seitz 6x17 Digital - version 4.05 - May 2013- © by Seitz Phototechnik AG / Switzerland www.roundshot.ch page 52
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