Wednesday, 10 December 2014

How dark is it?

I've been trying to measure light intensity to get a clearer idea of how much variation there is in different plant growing environments. I'm going to take measurements in a number if different situations and list them here just for interest.

To understand how the photos were taken please see the page on measuring light intensity with a digital camera.

Some measurements:

March in Cambridge:
ISO-100
1/80th second exposure
f/13









December in Cambridge:
ISO-100
1.3 second exposure
f/13









Night time, with street lights,
in December in Cambridge:
ISO-100
30 second exposure
f/13


Indoors, after dark. 
ISO-100
8 second exposure
f/13