Architecture
Astronomy     Equatorial table   Hydraulic focussing    Stepper motor control     Hydraulic control    How to make a telescope   Information for beginners   Links and bibliography  Gastronomy    Recipe schematics   A few edible recipes      How to bake a well-risen cake    Links Photography    Astronomy   Architecture   Animals   Landscape Crafts     Livroscope   Read html books on screen   High rise handlebar bike    Dominoes   http://queribus.free.fr	Old Monuments             Vancouver by day Vancouver by night Pictures taken by night must be composed with the same care as the ones taken by day. This is not always easy because some very dark details may show up on the picture whereas they are hard to see on site. Eye only attaches importance to the brightest objects whereas a picture tends to level out brightness. The light of the brightest objects is evened out and dark zones may appear clear like in the daytime. With a 400 ISO film, F/2.8 lens, my exposure time goes from 5 to 10 seconds. The sensitivity of the film drops as early as the first second, and the more the exposure time increases, the longer you need to expose your picture to see a difference. I often take the same picture with 5 and 10 second exposure. A good day picture, exposed 1/125 s, will be too dark if exposed 1/250 s, but it is not always easy to say if a night 5 second exposure is better that a 10 second exposure. Therefore you can count the exposure time mentally without any timer, a 1 or 2 second mistake does not matter.