Posts Tagged: Camera


18
Jun 12

Types of Lenses

In Latin “lens” is called lentil, and the plant genus is lens. Look at a lentil and see the shape; doesn’t it look like a camera lens? Yes, it does and 3000 years ago in Assyria the oldest lens ever found is the well-known Nimrud Lens, which was used as a fire glass and a magnifier.

Plano-convex lenses have given rise to the optical microscope and refractory telescope, as well as to the camera lenses.  Tim from Portrait Photography Derbyshire takes us through the various types.

Type of Lenses

The Lens of a camera brings on the film the light from the object or subject. The lengths are varied. They range from telephoto to wide angle, standard and medium telephoto. By manipulating the focus of the camera the objects can be reproduced accurately.

Single use cameras, for example, have a fixed focus; they will capture a clear image from 3 meters to infinity.

Single lens reflex cameras, allow the user to change the focus for accuracy. View Cameras use a removable glass screen that is then replaced by a sheet film or a photographic plate.

The PFCA (Planar Fourier Capture Array Camera) do not require focusing, it does not have lenses or mirrors, instead every pixel is allowed to bring to the 2D Fourier Transformer independent pieces of information that a computer program will reconstruct.

The lenses of a camera are also called Photographic Lenses, and they differ from video camera lenses as well as from still cameras. Due to its resistance to scratching, glass is the most used material in the construction of lenses. Other material allowing the manufacture of aspherical lenses is plastic and many modern cameras use plastic in their lenses.

Multicoated Lenses reduce lens flare and keep away the tainting of color by rejecting ultraviolet light.

Focal Length and Aperture are indispensable requirements on an optical lens. Focal length equals angle of view and aperture (usually called f number) permits the user to use a rapid shutter for the same shots.

Types of Lens: the fabulous Macro or Close-up, bring the focal plane forward in order to photograph very small objects or details. Zoom Lenses can go from a regular wide angle to a telephoto and are activated either by a button that electrically activates a motor in the camera, or by a barrel rotated by hand. It is well known among professionals that the best images are the result of middle apertures.

The Optical Lens from Japan: who does not recall someone having a Konica? From that camera to the Nikon F 35 mm, Japan issued a deadly challenge to German cameras like the R-Topcon 300 F2.8 and 135 F2.

German lenses as Kilfitt and Zeiss were eclipsed and declared bankruptcy. Japan ruled the lenses ‘market.


9
Jun 12

Marshall 7in. On Camera Monitor: Product Reviews: Adorama Photography TV

Photography Video Score: 4 / 5


7
Jun 12

DIY DSLR Camera Stabilizer Inspired by FrugalFilmmaker Nikon D7000

Photography Video clip Ranking: 4 / 5


3
Jun 12

FREAK CAMERA!? – Ricoh GXR + A16 Zoom unit Review

Photography Video clip Ranking: four / five


1
Jun 12

Large gas-powered RC model helicopter used as a camera platform

Photography Video Score: four / 5


1
Jun 12

Large gas-powered RC model helicopter used as a camera platform

Photography Video Rating: 4 / 5


29
May 12

Canon 5D mkII 7D & T2i – DSLR camera reviews

Photography Video Ranking: 4 / five


26
May 12

RC Helicopter Aerial Photography by Flying Camera Systems

Images Video Score: 4 / five


26
May 12

Sony Alpha NEX Camera – Available Low Light (NEX-5, NEX-3) dslr

Images Movie Ranking: 4 / 5


25
May 12

Introduction to camera flash with Mike Browne

Images Movie Ranking: 4 / five