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Ok Let’s continue

Crop Reduction

Some lenses are designed to reduce this crop factor. While they cannot eliminate it completely, they can adjust for it.

Essentially, the lens is designed so that the back (the part that attaches to the camera) is closer to the digital SLR sensor.

Since the back of the lens is closer to the sensor, it reduces the amount that the small-sized sensor crops out of the image.

There is one big drawback to this type of lens: it won’t work with a film SLR camera. If you’re never going back to film again, then lenses like these won’t limit you one bit.

Image Stabilization (also called vibration reduction).

The stabilization helps when you are holding the camera in your hands and taking photos at slow shutter speeds.

Typically, this would result in a blurry photo, but with an image stabilization lens you can get clear shots. The stabilization corrects for the fact that the lens is shaking around.

This is especially helpful on lenses with long focal lengths (100mm or greater) since camera shake is magnified at long focal lengths.

You are going to pay a huge premium for an image-stabilized lens, but if you take a lot of photos in low-light conditions and don’t want to attach the camera to a tripod all the time, this is the way to go.

Image-stabilized lenses are NOT necessary with digital SLR cameras that include built-in anti-shake.

Superior Optics

Some lenses are designed with special optics that adjust for distortion, reduce flare and stray light from entering the lens and are designed to produce images with maximum clarity.

These lenses all come with different names

For example, Nikon used the term “ED” while Canon’s pro optics are branded with an “L”

Any one of these lenses is going to cost significantly more than a lens without the superior optics.

Internal Zoom

This really is a specialty feature, but it can make a difference. If you have a zoom lens with an external zoom, the length of the lens changes as you zoom from wide angle to telephoto.

With an internal zoom, the length of the lens is always a constant.

This is helpful for 3 reasons:

1. an internal zoom does not affect the balance of the camera. If you have your digital SLR attached to a tripod and use an external zoom, the changing length of the zoom changes the center of gravity of the camera.

2. internal zooms tend to be smoother and faster than their external counterparts.

3. external zooms can “slide”. This means that if you are pointing the camera toward the ground, the lens will zoom in unless you are holding onto the zoom ring.

The World’s Most Expensive Digital SLR Lens

Each one of these features will add to the price of your lens:

  • Internal zoom
  • Wide maximum aperture
  • Full-time manual focus
  • Superior optics
  • Silent autofocus
  • Image stabilization
  • Long focal length
  • Crop reduction
  • Non-rotating front element

Hope that guide can help you.

More info visithttp://rebeldigitalslr.com

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