Comparative images for a range of Front-of-lens IR filters
Clive R. Haynes FRPS
Above: 720nm Filter. RAW File
Above: 720nm Filter.
With Adjustment Layers for 'Levels' > Auto + 'Channel Swap'
With Adjustment Layers for 'Levels' > Auto + 'Channel Swap'
Above: 720nm Filter.
With Adjustment Layers for 'Levels' > Auto + 'Channel Swap' + 'Black & White'
With Adjustment Layers for 'Levels' > Auto + 'Channel Swap' + 'Black & White'
Comments:
As expected, the test revealed a very red looking RAW file with good contrast.
After applying 'Levels' > 'Auto' and 'Channel-Swapping', some interesting cool slightly cyan-blue and delicate magenta colours were revealed.
The black & white result is useful with a little more contrast than the 680nm filter. It presents a good tonal range for personal expression.