Photography Asked on December 17, 2020
When I shoot pictures of badgers I recently found that the Nikon D500 + 200mm F/2.0 is a great combination. Badgers often come out very late when its quite dark but they cant see too well so you can get relatively close to their den. I used to shoot the 200-400mm F/4.0 but the 200mm F/2.0 gives me two stops more light which gives me almost an hour of extra time when the sun sets.
The only problem is: Focusing can get tough sometimes.
My question is: Could an infrared torch be used to assist the focusing of the camera? I guess that it wont work with mirrorless cameras like the Z7 (or in live view with the D500) since they should have an infrared filter and the focusing gets done at the sensor plane but the D500 has a dedicated autofocus sensor bay.
One possible useful answer is that Nikon speedlights add an infrared focusing assist LED, which gives several times greater useful range than the white LED on the camera. I don't know the maximum range, but I know 50 feet will work fine on a SB-800 to allow focus in the dark. The camera focus indicator must be moved to the center position on the screen for the Assist to operate. The LED is red in the dark, but really hard to see in indoor light.
If you don't want the hot shoe flash to fire then, those flash models with Commander can operate as Master, but with Master Off (group M mode set to --- is Off), and it will still assist focus with infrared.
Answered by WayneF on December 17, 2020
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