Lens Performance, Getting the Most from a Lens

  Camera motion causes blur. Though some photographers claim to be able to hand hold a camera steady at slow shutter speeds-V” sec. or even slower-it takes only a slight amount of camera motion during exposure to cause a noticeable blur in an image. If a sharp picture is your aim, using a fast shutter speed or supporting the camera on a tripod is a much surer way to produce an image that will be sharp when enlarged. … PDF: Lens Performance Getting the Most from a Lens

FLOSS manuals

FLOSS Manuals is a collection of manuals about free and open source software together with the tools used to create them and the community that uses those tools. They include authors, editors, artists, software developers, activists, and many others. There are manuals that explain how to install and use a range of free and open source softwares, about how to do things (like design) with open source software, and manuals about free culture services that use or support free software and formats. Anyone can contribute to a manual – to fix a spelling mistake, to add a more detailed explanation, Read more