Comparative images for a range of Front-of-lens IR filters Clive R. Haynes FRPS |
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Above: 850nm Filter. RAW File |
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Above: 850nm Filter. With Adjustment Layers for 'Levels' > Auto + 'Channel Swap' |
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Above: 850nm Filter.
With Adjustment Layers for 'Levels' > Auto + 'Channel Swap' + 'Black & White' |
Comments: This test revealed a RAW image which is red with slightly magenta cast and good contrast. After applying 'Levels' > 'Auto' and 'Channel-Swapping, this time, compared to 680nm, 720nm and 760nm filters, cyan-blue is slightly reduced in intensity, whilst magenta is a touch stronger. The black & white result is useful with good contrast. It presents a good tonal range for personal expression. |