focal

focal length

Reviews The distance between the lens and the film or sensor plane is called the focal length. The longer the focal length, the greater the camera can magnify a distant object. To maximise the amount of light of all wavelengths reaching the sensor, a...

21 December 2006, 10:00 > More matches in Reviews

Which kind of lens do I need?

Reviews This camera uses a fixed-focal-length lens, but it lets you select macro or landscape focus mode Focal lengths generally differ for the same lens mounted on a film camera, which can be confusing and cause vignetting

12 May 2005, 18:49 > More matches in Reviews

Sigma DP1 review

Reviews It uses the same unique three-layer Foveon sensor, but this time in a compact body with a fixed focal-length 28mm equivalent lens. Fixed focal-length lenses require far fewer optical compromises than zooms, and the result is images with distortion...

Editor's rating   7.6

Tags: sigma, definition, raw, length

19 September 2008, 15:48 > More matches in Reviews

Best long zoom compact cameras

Reviews The size of a zoom lens is determined by the focal length of the camera. Because different cameras have different focal lengths and different-sized image sensors, a standard measurement is used that expresses focal length as the equivalent to a...

8 May 2008, 9:35 > More matches in Reviews

Panasonic Lumix DMC-FZ30 review

Reviews Optional accessory lenses help expand the camera's already broad focal range, but at around £150 per lens, you'll be stretching your budget into dSLR territory. The successor to the 5-megapixel FZ20, the FZ30 is also equipped with optical image...

Editor's rating   6.9

Tags: panasonic, raw, high speed, macro

11 January 2006, 14:57 > More matches in Reviews

Telescope Simulator

Downloads Controls include: focal length, aperture, eyepiece focal length and apparent field of view. Calculations include: magnification, focal ratio, exit pupil, field stop and true field of view. Telescope Simulator features an easy interface and displays...

28 May 2003, 12:31 > More matches in Downloads

Photos: Hands-on with the Nikon Coolpix S210, S520 and S600

Crave It boasts a 3x zoom Nikkor lens with a slightly underwhelming 35mm equivalent focal length of 38-114mm. The Nikon Coolpix S600 is a 10-megapixel beast with a 4x zoom lens that fits in a comparatively vista-like 28mm equivalent focal length.

25 February 2008, 16:40 > More matches in Crave

Nikon Coolpix S610 review

Reviews And Nikon's VR system will help cut camera shake in low light and at longer focal lengths -- Nikon claims it will produce sharp shots at up to four shutter speeds slower than usual. With an equivalent focal range of 28-112mm, it goes usefully wider...

Editor's rating   6.3

Tags: nikon, detection, scene, child

19 September 2008, 9:58 > More matches in Reviews

Samsung Digimax Pro 815 preview

Reviews But unlike many megazoom digital cameras, it also has a reasonably generous wide-angle focal length of 28mm (35mm equivalent). OutlookThe Samsung Pro 815 has the potential to offer much of the focal-length versatility of a digital SLR camera...

Tags: samsung, digital camera, length, lens

22 August 2005, 15:05 > More matches in Reviews

IP Camera Bandwidth & Disk Space Calculator

Downloads Additionally you can calculate focal length for camera lens to determine what 3rd party lens will be needed. Version 3.0.2 adds support for camera lens focal length calculation and for new compression options.

11 November 2007, 20:01 > More matches in Downloads

Canon PowerShot SX10 IS review

Reviews Keeping the subject steady in the viewfinder is much easier, and there's just the slightest 'drift' to deal with rather than the wild jittering of non-stabilised lenses at this focal length. The focal length markings on the lens are a bit pointless...

Editor's rating   7.7

Tags: canon, length, zoom, dial

12 November 2008, 15:32 > More matches in Reviews

Creating 3D worlds from photo albums

News Our scene reconstruction automatically estimates the position, orientation and focal length of the cameras that took the photo. Because the tool measures the focal length of each image, Photosynth can determine the exact location the photographer...

3 August 2006, 10:20 > More matches in News

Hands-on with the Olympus E-420: Pancake day

Crave Less than 25mm thick, it boasts a 35mm equivalent focal length of 50mm, minimum focal distance of 20cm and an aperture range of f/2.8-f/22. The Olympus E-410 was our Editors' Choice of cameras last year, and the E-510 was our travelling companion...

Tags: olympus, lens, glass, focal

2 May 2008, 10:15 > More matches in Crave

Panasonic Lumix DMC-FZ20 review

Reviews The optical stabilisation makes the extreme telephoto focal lengths feasible in a digital camera that most people will normally shoot handheld. We obtained crisp, handheld photos (top) using a shutter speed of 1/50 of a second with the lens zoomed...

Editor's rating   7.6

Tags: panasonic, digital camera, optical, shots

19 November 2004, 18:14 > More matches in Reviews

News.blog: New top-end Olympus dSLR in October?

News The field of view of a Four Thirds lens is half that of a 35mm SLR lens with the same focal length, so a 50mm lens works much like a 100mm lens on a Four Thirds camera. Also in the presentation is the EC-20 teleconverter to double telephoto focal...

13 July 2007, 8:44 > More matches in News