FIELD OF VIEW GeoSnap Pro, User Manual

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© Field of View 2018 GeoSnap Pro User Manual
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The cycle time of a camera is dependent on its buffer size, processor write speed, image size, SD
card write speed, etc. To figure out the cycle time of your camera system, set the GeoSnap to
time triggering and set the time interval to a reasonable guess for the camera’s cycle time (for
most DSLR-style cameras, a good starting point is 1 sec). Point the camera at a complex scene
(outside the window works well) as this can affect the file size of the images, and thusly the
cycle time of the camera. Start time triggering with the GeoSnap and let the camera trigger for
several minutes until you are confident that it can keep up with the commanded cycle time. If
the camera starts lagging or missing images, try increasing the time interval. If the camera is
keeping up, try reducing the time interval. Continue this testing until you are fairly confident you
have found the
camera’s fastest cycle time at which it can sustain triggering indefinitely. We
then recommend doing a long test (at least the length of your mission) to make sure that the
camera keeps up over the mission length.
Field of View has performed cycle time testing with various cameras, and the results are shown
below.
Note that these numbers are for reference only, and it is still highly recommended that
you perform your own testing!
CAMERA FILE FORMAT SD CARD
TEST
LENGTH
MIN CYCLE TIME
SONY A6000 JPEG, Fine
32GB SanDisk Extreme
Pro (95 MB/s read speed,
90 MB/s write speed)
20
minutes
0.8 seconds
SONY A7RII JPEG, Extra Fine 1.5 seconds
SONY A7R JPEG, Extra Fine 1.5 seconds