Normal lenses
Lenses that are classed as normal lenses are around 50MM lens there normal because there in the middle of the spectrum and not wide-angle or long-focal lenses.
The situations that suite the normal lens is day to day pictures on the go,indoor use and studio photography also pictures of friends and so on.
Because the normal lens looks like the human eye looks and sees the world around it,the technical measurements are from around 40MM to 55MM as of the eye the lense looks around from 240 degrees around the fuzzy borders down into the degree of 2 to fantastic sharpness in the center of the lense and this would be free of perspective distortion just like the human eye.
The lense coverage is around 45 to 50 degree to be regular and not have distortion like wide-angle and long focus lenses.
But some say that natural lense cameras are to average and feel restricted so look for more dynamic photography that wide-angle and long-focal lense gives.
The canon EOS 450D 12.2MP digital SLR camera lenses insure this range with there EF 14MM F/2.8L USM at the wide angle end up to the EF 800MM F/5.6L IS USM at the long focal end of the range.
The normal range for the EOS 450D is the EF 50MM F/1.2L USM consummate low light creator ideal for controlling depth of field and shooting indoors flash free.
Wide-angle lenses
The wide angle lens has a little focal length than the standard lens this gives the camera power to capture a wide angle shot in minor spaces the most noticeable property is for example in ungenerous spaces where you cant move backwards to get full picture like normal lenses but with wide angle lens it give Noble coverage of interior views and will often convey with a full sweep of the landscape witch gives a depth view of close up objects and long view landscape in the background.
The Canon EOS 450D lense that are wide-angle lens are a EF 14MM F/2.8L USM the exacting professionals ultra wide-angle lens uses UD and aspherical elements for paramount image
quality a maximum F/2.8 aperture ensures great low light performance.
This means aspherical and UD are two types of lens elements: aspherical elements is to fix spherical aberrations and super UD (ultra low dispersion) elements to exclude secondary chromatic aberrations so results are crisp, high contrast and undistorted image quality all the way to the frame peripheries and the USM is a ring USM auto focus with manual override and Canon`s ring USM auto focus system employs ultra-sonic frequency vibration for fast accurate and virtually silent operation with excellent holding torque.
Full time manual focus override via a large ring that does not rotate during auto-focus this allows the photographer to make fine tuning a shot instantly.
Long Focus Lenses
Long focus lenses have a great ability to let you work at long distances this art of stalking when photographing wildlife at long distance and gives the photographer a chance to remain obscure to its subject and the images are bought to the forefront and background and foreground is left out of the image so the subject is in full frame. The problem is with these long focal lenses they are heavy and hard to manage and keep still when taking the shots so is has its advantage with long distances so great for sports and wildlife photography.
The lenses in this range for the Canon EOS 450D are Canon EF 800MM F/5.6L IS USM these features are L-series construction the EF 800MM F/5.6L IS USM incorporates canon highest standard of precision optics with dust and moisture seals offer advanced protection from the elements even in harsh weather conditions.
ZOOM LENSE
A zoom lense has a variable focal length which means that in a single housing a range of different magnifications and angles of view can be combined.
The image quality possible with this kind of lens used to be poorer than the fixed focal length lenses recently though lens design has improved and the modern day zoom lense have excellent optics.
Zoom lense have a wide range of zoom lenses covering all ranges from wide-angle lens to long focal lenses.
Generally the range of a zoom lens is between two and three times its shortest focal length like 35-70mm is a popular lense as are 80-200MM and 100-300MM at the extreme end of focal length as the design of the optics is very complex and it makes these lensed very expensive.
The Canon range of zoom lense start from EF-S 10-22MM F3.5-45 USM up to EFT-S 100-300 FL/4.5-5.6L IS US covering wide-angle up to long focal length with 40 different lenses to fit your needs.
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