... and even then its still a stop underexposed … and you have to wait another 16 seconds for dark frame subtraction …
Digital SLRs can be used for infrared photography, but they don’t necessarily make it easy (though its easier than trying to find rolls of films that haven’t been made for a few years!). The silicon sensors in digital SLRS are naturally very sensitive to infrared, but a very strong filter is added to drastically reduce the amount of infrared that gets to it. We need to work with the tiny amount that gets through!
And this results in the above exposure being needed with a Sony Alpha 700 when using a Wratten 87 equivalent filter.
here’s the shot of a corner of my garden to show the result (exposure and whitebalance adjusted!):
(click for larger image)
More information is available on my website
