First photo shows a lot of cloudy trichomes, no amber, third photo shows some amber. When amber begins it's at the earliest possible harvest window, it is believed that keeps the high more of an upper. Lots of folks prefer that there are a lot more amber trichomes before harvest, it is believed that makes for more couch lock, perhaps a stronger high. Thus harvest time is a variable window depending on what you want from your harvest. It is said when trichomes turn amber, that represents a breaking down of THC into some other chemical (maybe it's CBN, not sure), so peak THC occurs when trichomes are cloudy. I'm not sure where the truth is, but you can make several harvests of clones trying both harvesting tactics and make your own choice of best time to harvest.
