Camera Lenses Faq
Here are some of the questions most frequently asked by people new to digital photography.
How different is the optical zoom digital zoom?
Optical zoom functions of digital cameras in the same way as the normal 35 mm cameras. The lens moves back and forth to bring the image closer, without losing any quality. The optical magnification of the movement varies lenses 2.0x to 10.0x. The closer you get to the upper end, the farther the subject can be when you take a picture. Moreover, the digital zoom is actually a software that simulates the optical zoom, without any physical movement. What he does is to crop the image and enlarge it, as well as an application for editing photos you can use later. Using an image editor then transferred those pictures to your computer is actually a better option, because you have more control over what is culture. Some new models of digital camera to automatically zoom you have exceeded capacity of optical zoom. If you do not want that to happen you can switch the feature.
What is the zoom capability of a digital camera must have great a performance?
As stated above, the optical zoom can range from 2x to 10x, but most users are satisfied with 3x-6x. However, a high zoom capability is a good thing, as long as you make sure you do not neglect other features.
What is a megapixel?
One megapixel is made up of one million pixels. "Pixel" is short for 'picture element, which is one of the millions of small dots that form the digital images. Your PC screen and digital camera images are made of grids of such points. Each has a color and all these colors combined points form the image. To find the total number of pixels, multiply the vertical, the horizontal dimension. The PC level, for example, has 1024 x 768 = 786,432 pixels or 0.8 megapixels. A camera with more megapixels can take pictures more detailed and clear. For example, if you take a picture with a 2 megapixel camera, you will receive two million pixels, whereas with a 4 megapixel you get 4 million pixels. If you just print them in small sizes that will probably not see any difference, but the 8×10 showing.
How Many Pixels Do I Need?
Depends on what you want to do with your photos. If you normally do not cut them and print only in small sizes (4×6, 5×7), you can do much with a 2-3 MP camera. If you want to print photos at larger sizes, you need at least 4 MP. Despite the many advice you can get to get high-resolution camera you can afford, you should think about what you need and the fact that there are other features to consider as well.
How is nickel-cadmium (Ni-Cd) differs from a rechargeable nickel-metal hydride (NiMH) one?
Ni-Cd and NiMH batteries look almost the same, but the NiMH batteries using hydrogen instead of alloy absorption of cadmium. A NiMH batteries have 2-3 times higher in comparison with a capacity of Ni-Cd of about one the same size and has less environmental impact.
About the Author:
Mr. Don specializes in writing on image resizers at Reshade. Reshade.com specializes in picture software applications and provides an
online picture enlargement application
. As a plus it provides a
image resizing
software application.
Article Source: ArticlesBase.com – Digital Camera FAQ
3 Real UFOs England April 2008
|
|
Professional 16 Channel H.264 DVR with 12 x 1/3 SONY CCD, 600 TV lines, 3.6mm lens, 48pcs IR LED, 131 ft IR Distance, WDR(1T HD) $1,585.00 Package includes: GW9016V – 16 channel network DVR with 1T HDD; |
|
|
Professional 16 Channel H.264 DVR with 12 x 1/3 SONY CCD, 600 TV lines, 3.6mm lens, 48pcs IR LED, 131 ft IR Distance, WDR(2T HD) $1,685.00 Package includes: GW9016V – 16 channel network DVR with 2T HDD; |
|
|
Sony Alpha DSLR-A700 Digital Field Guide $7.15 The Sony Alpha DSLR-A700 Digital Field Guide is filled with everything you need to know in order to take amazing photographs using your Sony Alpha A700 digital SLR camera. This full-color portable guide walks you through the essential controls, features, and functions of the A700 using step-by-step instructions and full-color images of each menu screen. This robust guide not only shows you how to … |