It takes a bit of manual dexterity (I guess the name comes from that) and some hand-eye coordination as well as a good straight edge. I tape down a large steel square for that. I have been using the same one for 35 years, and it has not failed me yet.
But it's not easy, so most will just pass it by.
|Hot Air Balloons Over Bagan by User9320321874|
|Yellow Warbler by LeeS|
from A Big Year - birds
|Waiting for the Parade by tcoker1103|
from - La Vida Loca - (Black and White Street Photography+ A Border)