Originally posted by C_Jones I read once that digital camera sensors are twice as sensitive to green as to other colors. How true it may be as a real factor I am not sure.
This is true, every pixel has 4 (1R, 2G and 1B subpixel) arranged in the Bayer/X-Trans array. But this should only make a difference when focusing in Live-View.
However, thanks for your reply!
---------- Post added 04-29-21 at 11:06 PM ----------
Originally posted by Mooncatt I don't know about animals, but it's less harsh to my eyes. Plus I like that it's different from everyone else.
True ;-)
---------- Post added 04-29-21 at 11:09 PM ----------
Originally posted by pschlute AF assist lighting pre-dates camera sensor focussing by a long way. PDAF is colour blind
Yeah right. Measures the divergence between two beams of light, doesn't it?
---------- Post added 04-29-21 at 11:11 PM ----------
Originally posted by othar I don't think it really matters what color it is from a technical perspective (except for LV AF maybe, because of the bayer filter on the sensor - does it even work with LV? I've never tried) . The green light does fit to the top lcd screen and the displays of the optical viewfinder though.
It works with Live-View. LV even needs it more, as it isn't as sensitive as the PDAF.
---------- Post added 04-29-21 at 11:14 PM ----------
Originally posted by mikesbike Bright white light to help AF also can cause human subjects to squint or otherwise alter their expression. As for animals or other uses, it can come on even when the distance range renders it ineffective, and not good to have a beacon going when you'd rather be of low profile.
Ok, that makes sense.
---------- Post added 04-29-21 at 11:17 PM ----------
Originally posted by Bob 256 More efficiency as Fogel70 stated since camera sensors peak sensitivity is in the green region as with human eyes. Also, for the same amount of power (battery current) a green emitter produces more light than a red one (in terms of mW output). This could be a secondary reason for the shift to green. One other reason might be that sharpest focus is achieved with green light. There is a slight focus shift with most lenses for red or blue light (achromatic lenses are optimized for green).
My most recent flash also has a green assist light. My K-1 allows its green assist light to be turned off if desired (I shoot dimly lighted church pictures occasionally and a bright green assist light isn't desirable - fortunately, the K-1 focuses great without it). When assist lights started to show up, only red LEDs were available. Now you have many choices and green probably has the fore-listed advantages
Thanks. Yeah. I shot in a church too, and the light turned off in the least convenient moment. I turned it off then, and all went fine.