Telephoto lens
长焦 · 135mm · 200mm · 长焦压缩

What it is
135mm and longer: space compresses and the background stacks behind the subject.
When to use it
A surveillance feel, isolation in a crowd, heat-haze streets.
When not to
When depth must read.
Often confused with
- Wide lens
Wide expands space; telephoto compresses it.
Common generation mistakes
SymptomDepth stays deep and it doesn't read as telephoto.
FixState telephoto compression with the background stacked close behind.