Infrared photography with 72nm infrared filter

                    In the film era infrared film was practically used in aerial photography applications for forestry and camouflage detection, as well as other     

                    scenarios  where specific infrared reflectance photographs could be useful. In digital time, the digital image sensors take the place of the films.

                    There are two ways to do infrared photography now, converting a regular digital camrera into an infrared camera through modifying the image   

                     sensor or put an infrared lens attachment filter in front of the camera lens.  With an infrared lens attachment filter long exposure time is required, 

                     appearantly the camera need to be on a tripod. With specialized infrared camrera one can hand held the camera using normal shutter speed.

                     But this is an on way trip, once the camera is converted to an infrared camera it can only be used for infrared photography.  Here I used   

                     "convert", since there is no infrared camera available in the  consumer market, an infrared camrera is modified from a regular digital camera,

                     appearantly you don't want to do this with your main camera.

                     Hoya R72 is an infrared lens attachment filter, it blocks most visible light and lets 72nm wavelength infrared light passing through. 

                

 

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所有跟帖： 

• as surreal as aerochrome. -7grizzly- ♀ (0 bytes) () 09/03/2023 postreply 21:47:11

• aha, this is real surreal -移花接木- ♂ (0 bytes) () 09/04/2023 postreply 10:38:04