How to make a speaker with your own hands?

For information on how to make the speaker and the speaker of the plastic bottle that can compete with cheap computer speakers.

How to protect a camera from a dust, a rain and snows?

A few simple advices on how to protect your camera during certain weather conditions.

Sometimes it might be necessary to shoot during rain or a snowfall or in dusty air. In such cases it is possible to protect your camera by using an ordinary polyethylene bag.