High ISO images have more noises; this slows down the
process of creating and compressing the images.
Users can change capture
speed in many ways
Capture speed is one of the most essential factors in
photography, people often improve it by replacement of high-speed memory card,
adding more grip or even changing for a new camera core. However, CrazyLab’s
tests have shown that ISO really affects capture speed.
The execution was simple: use one Canon 600D and a software
that record capture sounds on to PC then compare them in many times with
speeds in particular ISO levels
It was such an interesting result. In different ISO levels,
there were changes in the capture speed. ISO gradually rose from 100 to 12,800
and shown that consecutive image capture reduced from 8 to 5 times, prepared
time for shutter release increased. It must be noted that in every test, the
camera was set in manual focus mode, with same setting but different ISO.
The reason for this, according to the executor, is that in
high ISO level, more noises appear. This negatively affects the processor in
creating and compressing output pictures. Thus, capture speeds in first times
and shutter release in the following times also fall. In another word, ISO
level increase is in inverse ratio to capture speed.
Besides, tests on RAW and JPEG formats and different memory
cards were also carried out.
Below are some results
RAW (up) and JPEG (down)
memory cards in respectively top-to-bottom order: SanDisk Extreme HD Video,
Hama 150x, Samsung Essential MicroSDHC, SanDisk ultra II