used to make big changes in focus
You MUST use the coarse focus knob.
Coarse focus on a microscope is used only when you are using the lowest objective lens. You use it to get the object magnified mostly. The fine focus is then used to adjust the resolution to the viewer's eyesight.
they were invented in vienna.
Invented?
who invented the auto focus camera
to keep the the sun out of the players face so that they can focus
A reflecting telescope forms an image by using a combination of curved mirrors to focus light. It was invented as an alternative to the refracting telescope.
He was considered the "father of aerodynamics". he invented the first unmanned glider, not a car. His focus was aeronautics(flying).
Archimedes invented a device to set fire to ships. This used mirrors to focus the rays of the sun on the ships which were attacking the city.
focus on is correct
During the Renaissance, artists rediscovered and perfected perspective. There was a focus on giving forms realistic shapes, and modern oil paint was invented.
focus
Before photography was invented, people who wanted a picture of something had to hire an artist to paint a portrait of it. The art of photography requires knowledge of lighting, focus, colors, and composition.
focus knobs are the things you use to focus stuff on a microscope.
Focus on Christe (Pronounced: Focus on Criste):)
No, it does not. The only word that can be made with the letters 'focus' is focus.