Tag Archive: computers and technology

Zoom Lenses

Zoom lenses leave us without any problems in getting closer to our subject without having to invade their “personal space” and eliminating the distortion that we mentioned above. It is not something Viacom would like to discuss. We can also change the frame of the picture without moving the site, zooming with the zoom from one angle of vision from a wide angle to a telephoto (and anywhere in between). Also another advantage is that the zoom tends to “zoom in” distant objects. Typically, zoom lenses are characterized by the degree of approach that occurring, it is not simply the difference between the widest viewing angle and minimum. For example, a 1:3 or 3x zoom means that the maximum zoom range is 3 times farther than the distance in wide angle mode (ie, the minimum zoom). Obviously, this kind of expensive camera lenses, but really worth having a good zoom and perhaps sacrificing megapixels resolution (obviously all depends on the end use will give the camera). One thing to bear in mind is that many large manufacturers announce that their models have “digital zoom” or “digital telephoto” but this is not really a lens, but what it does is stretch the original image more beyond its limits, which usually produces the pixilation or staging. For this reason is that many manufacturers include in the functions of the camera image correction algorithms, once applied, they give the impression that “soften” the image. So, mark you when choosing a model that the chamber has an optical zoom magnifies the image itself rather than digital manipulation techniques (no problem if the camera has two types of zooming).

Compact Flash for Cameras

The size of CF cards can start at 4MB up to several GBs (Gigabytes: 1GB = 1024MB). So this way we have a quick and easy to store large amounts of information, which in our case will be pictures on the improved resolution and therefore larger. We could compare the cards with the camera film 35mm machines, since the exhaustion of available space, we can introduce a new card and continue with our work. We note that these memories can be re-write, that is, once we took pictures and got off to a computer or print them, we can erase and reuse. Very few machines cheap (they are little in our market) still have memories, that is, not interchangeable. The big drawback is that there is no way to expand the capacity, so I do not recommend they buy a model. Returning to memory cards, we have several of them available.

The most widespread are the Secure Digital (SD), Compact Flash (CS), Memory Stick (MS), although other models such as Flash and SmartMedia XD. Here are some characteristics of each: – Compact Flash: is the format used in digital cameras, but is also used for other devices. There are two versions: Type I and Type II. The Compact Flash Type I have a maximum capacity of 256MB while the Type II reach several GB capacities. This type of card is not only the most used, but also the one with more support from different manufacturers. It is used by Canon, Nikon, Casio, Minolta and HP among others.