Fanof49ASU
Premium Member
In posting on another fish forum, I discovered something today.
Last night, I was trying to photograph my royal gamma. As usual, my colors get all out of whack with this one fish (tend to turn blue), so I was trying multiple shots.
I was focusing on a certain area, when I noticed my gamma going to that exact point and trying to peck at the spot. Soon, I realized that when I press my focus button, the gamma would go to that spot.
Then I got to thinking....the autofocus focuses using an infrared light, that bounces off of the subject and returns to the camera.......this fish must be able to see the infrared wave length....and after a quick search this morning, sure nuff, they can.
Here's Gammy looking at the infrared light cast on the rock.
Here's the pdf supporting that they do indeed see some infrared, as well as ultraviolet, wave lengths.
http://www.amnh.org/education/resources//r...u_x01_light.pdf
If this has been discussed, please disregard. I'm easily amused.
Last night, I was trying to photograph my royal gamma. As usual, my colors get all out of whack with this one fish (tend to turn blue), so I was trying multiple shots.
I was focusing on a certain area, when I noticed my gamma going to that exact point and trying to peck at the spot. Soon, I realized that when I press my focus button, the gamma would go to that spot.
Then I got to thinking....the autofocus focuses using an infrared light, that bounces off of the subject and returns to the camera.......this fish must be able to see the infrared wave length....and after a quick search this morning, sure nuff, they can.
Here's Gammy looking at the infrared light cast on the rock.
Here's the pdf supporting that they do indeed see some infrared, as well as ultraviolet, wave lengths.
http://www.amnh.org/education/resources//r...u_x01_light.pdf
If this has been discussed, please disregard. I'm easily amused.
