Saturday, 27 July 2019

infrared - What type of effect is caused by different cutoff lengths for IR filters?


I'm looking at getting into IR photography, and am trying to decide what cutoff frequency filter to buy. Has anyone done a comparison of the same scenes using different filters?



Answer




Well, I haven't personally, but the folks over at Life Pixel have. In summary:




  • 830nm - Deep blacks. Very contrasty in B&W.




  • Hoya R72/Wratten 89b /720nm - The most 'common' choice. Good all-around tone range, but less saturated than a 665nm filter.




  • 665nm - More saturation and color range. B&W will be less contrasty than the 720nm.





  • 590nm - Vibrant, intense colors. less over-all contrast. More possibilities for interesting surreal color shifting in post.




Pictures of all of the above options can be viewed at the Life Pixel website. Full disclosure: I am a customer of Life Pixel, having gotten my Canon 20D converted by them a couple years ago (went with the 720nm, Hoya R72 equivalent and I completely love it!). I don't get anything for mentioning them... Just a happy customer. :-)


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