Traditional Culture Encyclopedia - Photography major - What does "monocular" mean in the cheers of Mayday?

What does "monocular" mean in the cheers of Mayday?

"Monocular" is: Taiwan Province dialect, which is equivalent to Chinese mainland's SLR.

1.ocellus is a simple photoreceptor. Found in many invertebrates. It consists of visual cells, hexagonal corneas and conical crystals. You can only feel the intensity of light, but you can't see anything.

2. Another meaning is Taiwan Province dialect, which is equivalent to SLR in Chinese mainland.

"Monocular" in "Cheers" on May Day is the second meaning, which is SLR.