You must have seen a flower like contraption in front of many fixed telephoto lenses. Sometimes u find it on normal lenses also, what do they do? If you had a chance to see a professional film camera at work, he had been a device like an elephant ear attached to the front of the camera, which are called matte box.
Lens Hoods
The main purpose of these devices is to prevent glare and lens flares. Now, coming to slowhoods, again, there are several variations. The basic variant is similar to a lampshade, which are used on lenses that work in the highest parts of the region telephoto zoom, because the viewing angle is restricted to these regions is usually cause vignetting blocking the visual field of the lens. Now a days, we have goals that can range from wide to telephoto regions. When using such an objective, we can not use normal because the hood, they will cause vignetting bycoming into the field of view of the lens.
Design Considerations
This problem is solved by using specially designed hood that are designed taking into account the vertical and horizontal viewing angle separately. Usually, the horizontal viewing angle is larger than the sun and the vertical angle from the vertical. This requires a design that is more like a petal or a flower. The hood for each lens must be designed with dueinto account the angles of the lens to prevent vignetting. Hood also serve to protect the lens from physical damage. Some Hood prosumer camera models have a supply of filters or fixed focal length multipliers on them. In the world of macro photography, shorter hoods are available that have rings of LEDs attached to them to enable a proper illumination of the subject at close range. These hoods are extremelyversatile and provide a better degree of freedom for the photographer. You may have your battery packs etc built on them, this can sometimes make the camera a bit 'more front heavy affecting stability.
Matte Box
These are used mainly in the segments of video stills in the segment, because they give the possibility to adjust the length of the fins. The fins are called French flags and the ability to adjust the French flags give them a greater degree of freedom andflexibility. They are used in still photography, but also less visible and are mostly confined to controlled environments like a studio, this is mainly due to the large size of the matte box. They also serve the purpose of providing a place to repair glass or plastic filters. matte box is used more in the video segment, because most are shot in controlled environments. matte box are sometimes made by the same photographer to suite their needs. There are production companiesthey also and above all, no camera or lens, as employees, have adjustable components.
A hybrid of the two has been developed that has controlled the petals on the hood, but did not do too well and went out of business now.
So when buying a lens for your digital SLR, you should buy because its hood, it gives you an advantage when shooting in direct sunlight. It will give you better contrast and yourPhotos will be more lively hood when you use it, prevents the angle of sunlight falling on 's your front lens elements. The picture below should explain it better.
Visit : !: 26 Lcd HDTV On Sale !: Buy Now Keyed Padlocks !: Discount Lcd Tv Deal Minolta Lense In Us Bargain Sale Normal Lens Cheapest Digital Cameras Rating
0 comments:
Post a Comment