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Question: What are medium and full format cameras used for!? !?
I was wondering how they make those huge advertisement pictures that are placed on billboards and over buildings!. Is it by using medium or large format cameras(film or digital), or other kinds of cameras!? Www@QuestionHome@Com


Best Answer - Chosen by Asker:
most billboards, are done with DIGITAL cameras, slr medium format, or large format, aether one would make a good picture, if u look at a billboard from close u would notes that is a bunch of dots, but from far away it looks like a sharp picture!. they lower the resolution to amplify the image, sounds weird, but that's how they do it!. now if it is a image to be look from close, than it matters what kind of camera u use!.Www@QuestionHome@Com

The bunch of dots that you see are not necessarily the result of a digital camera!. They are more from the printing process which is a color half tone type of method at worst and a rotogravure (intaglio) method at the best!.

Digital printing is much like half tone printing in that the whole thing is divided into a group of dots that is prescribed by the density of the image!. Rotogravure (or Intaglio) is an engraving process!. The processes are quite different and yield very different results!. The high quality of photography that you see in National Geographic is done with rotogravure where a plate is engraved and the ink goes into the recesses!. The dot process is done by raised dots (if the process uses hot metal) and offset if it is not raised!.) The raised area, or the developed plate, allows the dots to be printed!.

The large cameras used to print these things are called "process cameras!."

In art, the method of pointillism yeilds very similar results!.Www@QuestionHome@Com

Not so much - there's a calculation for resolution and DPI at a distance!. Look at a billboard close up, and it's grainy!.

The resolution is not that great - many billboard companies specify 300 dpi at 1/12 scale!Www@QuestionHome@Com