Canon Lenses What Does Usm Mean
The lens is an essential element of good photographs. This is not only the camera. People spend thousands of dollars on a good camera and neglect the lens.
Change that around! Make sure you buy a camera lens whether the purchase a camera. Buy a good camera too, but do not overlook a good goal.
Why? Your camera is just the gatekeeper for photography. The goal is what the camera sees everything through your photos. A good goal is essential to clean and sharp pictures.
With most compact digital cameras, you can not change lenses. So in this case, do not just buy a good camera, make sure you also have a good objective.
Avoid plastic camera lens, because it has the clarity of a glass lens.
What model of the lens?
Stick with the camera lens from renowned manufacturers such as Nikon, Canon and Pentax. Make sure you buy a lens works with your camera too. A Nikon camera lens usually does not work well with a Canon.
There are manufacturers of special glass such as Carl Zeiss, Leica and Leupold. If you are a beginner, do not worry about these lenses until you are more advanced because they come with high prices and it is difficult to justify the price increase of the low quality.
Camera Lens Type
The most common objectives are: wide angle, normal and telephoto. Objective type is determined by the focal length of the lens. See below. A zoom is simply a goal that can change the focal length of a wide angle telephoto lenses (or somewhere in between).
There are a number of things to look for when buying a camera.
Focal Length
The focal length of a lens determines the amount of increases and wide angle lens vuew can see. The focal length is measured in mm. It is the focal length determines whether the objective is:
– Wide-angle, low rise, wide viewing angle. 20 mm to 35 mm
– Traditional or normal, 50mm
– TV, high magnification, the angle of Detroit view 105mm to 300mm.
– Zoom, zoom lens can change its focal length inch Zoom zoom can be a focal length of 50 mm and 150 mm.
Some targets are interchangeable between the cameras and cameras digital, but we must take into account the changes to take effect between the center and digital. The focal lengths I describe above are for film cameras and the need to be multiplied by 1.6 to get the focal length camera. So using a 35mm lens on a digital camera has a focal length of 56 mm.
What does this mean for you? This means that you not as wide-angle digital camera as you would a camera using the same lens. A 35mm lens gives a wide angle of half acts in a film camera as a digital camera lens Traditional
It is a complex issue, so I can not go into too much detail here. If you need more help, the best person would talk to your local expert resident photo shop.
Lens speed
The speed "digital camera lens sets an objective. The rate is determined in f-stops and is similar to the opening of f-stop settings of the device. Faster lenses are more expensive and often heavy.
Focus Distance
This is the minimum distance between the lens of the camera that the subject should be placed in development. Do not worry get a camera with a remote development. Focus on a TV instead.
More advanced features
lenses are more expensive the more advanced features.
Vibration Reduction -. A feature called "reduction vibration, which keeps images sharp when shooting in low light. Help against camera shake. Try to find a digital camera lens function.
– USM USM ultrasonic motor means. This feature of the Canon lens gives a speed of autofocus high, but the main profit is the engine is almost silent in order not to disturb people around you when your device is developed.
– Filter threads. When buying a half decent lens, must have a filter thread. It is a theme that allows the screw on a filter (eg a polarizer) to help when shooting challenging situations. Even if you do not need filters for the moment. is convenient to buy a lens with a wire so that you can add a filter more later.
You get what you pay
In general, the more expensive the lens, the better. More expensive lenses usually have a larger number element glass lens, which also makes them heavier.
Notes
While it is important to choose a good quality lens of the camera for beginners is not as important as good composition. Do not fall into the trap of thinking that can only have a blow with a goal of the upside of the range. A bad photo will not be well integrated with a large camera lens.
I do not want not diminish the importance of an objective quality. A good rule is to add to your collection as the target when you have a need a specific camera lens in particular.
Do your research and your homework and find the lens that suits you and your camera.
David Peterson has a great love of photography and has created a series of free tips at http://www.digital-photo-secrets.com/ to help digital photography users everywhere take better photos.