Wednesday, January 12, 2011

Wide Angle Lens for cameras Olympus 4/3

The Olympus 4/3 cameras and lenses are well known for their excellent quality. The system 4/3 has variety of lenses for the needs of everyone from beginners to professionals. Although the Olympus 4/3 lenses starting fisheye lens and ending with wide-angle telephoto lenses, the segment have not so many to choose from.

The Olympus 4/3 system is all at telephoto zoom lenses, wide-angle zoom lenses and wide angle Prime lenses. The level of telephoto zoom segment has most of the lenses to offer. The most famous is the 14-42 mm f/3.5-5.6 zoom that Olympus includes as a lens kit "standard" with most cameras. Also has an older version-the 14-45 mm f/3,5-5, 6. Both of these lenses cost around 200 dollars and aren't very good. The more pricier 14-54 mm f/2,8-3,5 has more to offer. This objective is sharper and quicker the maximum aperture at both ends.Is one of the original E-system lenses and was introduced wit the And-1 Back in 2003. the price for this objective begins about 500 dollars.

The Olympus 12-60 mm f/2.8-4.0 AND SWD lens is a lens of great trip has a much wider range than the lenses mentioned above and also has a best optical quality. Prices for this goal start around 900 dollars. The top of the range is 14-35 mm f/2.0 lens AND zoom.This is the more expensive Olympus wide telephoto zoom. prices starts from 1.800 dollars. This is also the heaviest Olympians broad telephoto zoom lenses, it weighs 900 g.

Wide angle zoom lenses has only the consumer level 9-18 mm f/4,0-5,6 lens. This is extreme wide-angle zoom more accessible for cameras Olympus 4/3.Prices starting from about 500 dollars. 11-22 Mm f/2.8-3.5 lens is of high quality, but is not very wide dramatically. And the top of the range is the Olympus 7-14 mm f/4.0 ED.This is the widest zoom wide angle Olympus lenses, but also the priciest options, prices start at $ 1500.

The first objective of wide angle only for Olympus 4/3 system is the Olympus 8 mm f/3.5 fisheye de. It has a 180 degree field of view and produces dramatic curved distortion.Prices for this goal start at around $ 600.

There are also other wide-angle lenses without third-party developers like Sigma, which makes the Sigma 10-20 mm f/4-5.6 EX DC lens and Sigma 24 mm f/1.8 EX DG macro lens primary. Although the Olympus 4/3 system does not have so many wide angle lenses as Canon or Nikon, yet there are enough to choose for every need for photographers.

Guntars is a hobby photographer dedicated. This is his second article, but you can also check out his latest site on Jansports Big Student backpack to

Friday, October 22, 2010

Overcoming Digital SLR Canon Crop Factor of for wide-angle photography

The crop factor, digital SLR or multiplication factor of the lens, has the effect of crop the edges of an image, broadening the central area. The end result is similar to using a longer lens, or a tele converter.

The effect of clipping occurs because the sensor on most digital SLR cameras is smaller than a 35 mm slide or negative.A "frame" of 35 mm film is 36 x 24 mm in size, while the sensor Digital Canon Digital Rebels (300 to 500 d) and the EOS ** range D (50 D 20 d and 7 d) is only 22.5 x 15 mm in size. a sensor smallest to receive the image means that some of the image will be cropped.

Think of it this way: you're watching a presentation on a screen that is just big enough to accommodate the full-size image, and then someone replaces it with a screen that is smaller. Now some of the projected image (top, bottom and sides) "overflow" the small screen, so that what you see now is a version of the image cropped.

You get a similar result when using a digital SLR camera with a sensor that is less than a piece of 35 mm film--the image expressed by lens "overflow" sensor. Any spare space around your subject is cropped away, so the subject now fills most of the frame--but if there is no spare space, part of the subject itself gets cut.

This cutout or magnification is an advantage when using a telephoto lens, as the result is similar to using a longer lens or 1,6 x Converter.

However, for anyone wide-angle shooting, the opposite is true. Now that terrible wide angle so appreciated for creating dramatic landscapes or indoors close is made useless seeds.A real wide-angle as a Canon EF 24 mm gets "stretched" 1.6 x, giving him a focal length equivalent of 38.4 mm on your Rebel XSi or 50 D.

Fortunately, Canon and other digital SLR manufacturers realized that they had to produce lenses for overcoming the crop factor for photographers using wide angle lenses.

The result is a range of lenses for digital SLR cameras with smaller sensors of 35 mm film (often called sensors APS-C format). While the crop factor still applies when using these lenses, the lenses themselves are "shorter", both physically and in focal length, than the lens equivalent to a 35 mm camera.

So the kit lens for Canon Rebel is THE EF-S 18-55 mm.This should be classified as "ultra wide" (wide end) to a 35 mm camera, but equals one more mundane 28.8-88 mm standard zoom--or--when used with a Rebel XSi or 50 D.

While the rebels and EOS Canon ** D digital SLR are classified as entry-level or "prosumer" cameras, they are also used by professionals, in particular, wedding photographers, not previously be adequately met by wide angle lenses available, particularly in terms of image quality and the focal length.

To work around this, Canon has introduced two lenses that are standouts within its range of lens EF-S for use on rebel and EOS ** D cameras:

* Canon EF-S 17-55 mm f/2.8 IS USM
* Canon EF-S 10-22 mm f/3.5-5.6 USM

THE EF-S 17-55 mm is notable for its constant aperture of f/2.8 throughout the zoom range which, together with image stabilization, makes it particularly effective for shooting in low light without flash. It is highly ranked by photographers of wedding and portrait and also as a walkaround lens.

Users like the lens for its sharp pictures at all focal lengths, autofocus fast, versatile and excellence in low light conditions are Their main dislikes. the price (is the most expensive EF-S lens), insufficient Weather sealing, plus the size and weight.

It however receives a score of 91% of users and is a highly recommended as a top quality lens for APS-C format cameras.

THE EF-S 10-22 mm is remarkable, as is the only true ultra wide angle for Canon Rebel EOS ** bodies d. Adapt this objective on your Canon 40 d and is equivalent to a 16-35 mm on a 35 mm or full-frame, offering creative photographers opportunities not otherwise possible with APS-C format cameras.

Users as an objective for its excellent sharpness, colors, autofocus fast and minimal distortion. They don't like the price, construction of plastic and lack of a lens hood supplied.

But the image quality is favourably compared to that of a Canon l series, and users give a rating of 90%, recommending it as essential for anyone who wants wide-angle real capacity on a rebel or EOS ** D body.

Users of Canon Rebel or EOS ** reflex D you can no longer blame their kit lens for less than stellar image quaility it--alternatives are available (although at a price).

Macaskill Scotch is a former photojournalist turned would-be wildlife photographer who now works from home to develop his site to photograph wildlife. Although not a fanatic of brand, he uses cameras Canon Digital Rebel and wide-angle photography recommends Canon EF-S 17-55 mm and Canon EF-S 10-22 mm.

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