I almost always have a lens hood on my camera. While shooting without a lens hood can still produce great pictures most of the time, if any light happens to bounce into the lens from the sides, the contrast and color in the image is significantly reduced. Also, it is nice to have a lens hood for protection of the lens. However, there are some lenses on which a lens hood is simply unnecessary. I recently saw one of my photography students with a lens hood on his 50mm f/1.8 prime lens. It looked quite strange because most people don't use a hood on that lens.
Stair handrails are in place so you have something to grasp while using the stairs. It is important to have the rail at a comfortable height to prevent falls. According to Human Cornell, a handrail height of 36 to 40 inches is most effective in preventing falls when descending stairs.uilding Codes. National and state building codes suggest a handrail height of 30 to 34 inches, which is 2 to 6 inches shorter than the suggested height for safety. If you are installing stairs, however, you must obey building codes and set the handrail height accordingly.
Install railings on any deck that is 30 inches or more from the surrounding surface and on at least one side of a stairway leading to the deck. The top of the handrail should be at least 34 inches but not more than 38 inches high.he handrail, itself, should be easy to grip, with a minimum diameter of 1 1/4 inches and a maximum diameter of 2 1/4 inches. You canât use a two-by-four but a two-by-two as a handrail would meet code.