If a job requires extra fine engraving such as fonts below 6pts what focus lens is recommended.?

How does thermal energy effect our daily lives? The acceleration of a bullt is measured in g's what is g? What is relative velocity for two bodies A and B with velocities Va and Vb in the same direction? What type of lenses can form real images? What are the principles of direct energy conversion? Will the object that is dropped hit the ground before an object that is that it is thrown horizontally from the same height? Why do you have wind mills? What name is given to the fan-like device that spins in a generator? How many pounds are in 85.9 kilograms? What is the color of nonluminous object? Which direction you are facing at the needle of the compass you are holding points directly to your left explain? What is ground refraction? What was used in thermometers in 1600 instead of water? What forces act on rocket when taking off? What is the name of the variable that is changed by another variable changing? What is the worst cheer accident? Can you give me a sentence for the word unbalanced force? Why is energy is wasted? Does the size of a bouncing ball affect how high a ball will bounce when dropped from the same height? Law of conversation of energy?

If a job requires extra fine engraving such as fonts below 6pts what focus lens is recommended.?