Old Vintage Cameras: Bolex 8mm, Voigtlander 35mm, Balda Vintage Film Cameras

Monday, February 27, 2012

Bolex 8mm, Voigtlander 35mm, Balda Vintage Film Cameras

Kodak Holy Land Slides Set 1 $28.45Price: More Details	Polaroid Color Adapter Kit $23.45Price: More Details	Ricoh Finder F 2.8 $23.45Price: More Details	Bolex L8 8mm Swiss Camera $138.45Price: More Details
Shure 540S Microphone $198.45Price: More Details	Thorens Cigarette Music Box $174.95Price: More Details	Sony Retro Cube Clock Radio $28.45Price: More Details	RCA Victor RHC25W Radio $28.45Price: More Details
Grundig 850 Radio $38.45Price: More Details	Channel Master Radio $38.45Price: More Details	Balda Juwella $118.45Price: More Details	Voigtlander Vito II $198.45Price: More Details

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What is a Camera Obscura?

The camera obscura (Latin; camera = vaulted chamber | obscura = dark, thus darkened chamber or room) is an optical device that projects an image of its surroundings on a screen. It is used in drawing and for entertainment, and was one of the inventions that led to photography. The device consists of a box or room with a hole in one side. Light from an external scene passes through the hole and strikes a surface inside where it is reproduced, upside-down, but with color and perspective preserved. The image can be projected onto paper, and can then be traced to produce a highly accurate representation. Using mirrors, as in the 18th century overhead version (illustrated in the History section below), it is possible to project a right-side-up image. Another more portable type is a box with an angled mirror projecting onto tracing paper placed on the glass top, the image being upright as viewed from the back. As a pinhole is made smaller, the image gets sharper, but the projected image becomes dimmer. With too small a pinhole the sharpness again becomes worse due to diffraction. Some practical camera obscuras use a lens rather than a pinhole because it allows a larger aperture, giving a usable brightness while maintaining focus.