1. Fish Red and White
Except the oxygen needed (muscle rest or active)
The diet
- orange flesh generally been feeding heavily on ocean crustaceans (甲壳类), contain pigments called carotenoids (胡萝卜素)
2. Why Salt Lake in Bay Area
Both natural and human activities
- Mix of freshwater from rivers and saltwater from pacific ocean
- Salt production, large areas are diked off to create evaporation ponds
- Reduced freshwater inflow
3. Lens. F vs T
F-stops are a theoretical measurement
T-stops are actual measurements that are tested when the lens is calibrated
- Important for using lenses with matching T number ensures consistent exposure
- Just a relative number compared to F, so no direct physical meaning
$$
F=\frac{FocalLength}{DiameterOfEntrancePupil}
$$
Actually the diameter should be small
- due to not perfect design, the diameter is always larger than that