Digital Cameras
From Wiki2buy
Shopping Guide Digital Camera
The digital camera has definitely been the most popular product recently. A lot of families who used to register parties, travels and birthdays by using for many years the good and traditional film camera were obligated to purchase a digital camera because nowadays it has been more expensive to reveal film photos and the economy of printing only the good photos has definitely convinced all the consumers. Another point that made the digital cameras a much desired product is the display introduction that allows us to visualize the photo right after it has been taken. It is important to say the first digital cameras models didn’t use to have this function. Check here some good tips to help you replacing the old film camera or buying a new digital one.
Why are the SLR cameras the best?
Actually that depends on its ability and necessity. SLR cameras present more advantages than the Point and Shoot cameras but also they have some little inconvenients like their size, for example. First, SLR is the acronym to Single Lens Reflex. This assertion that SLR cameras are better than Point and Shoot ones started when the cameras worked only with films especially because the SLR cameras didn’t use to have parallax mistakes. The parallax mistake happened because in the old Point and Shoot cameras the image that was visualized on that little display above the camera wasn’t exactly what was going to be captured by the camera lens and that is because they were in different positions. That is why it was very common to see some photos with people with their heads or feet off the photo! Nowadays with the advent of the digital cameras display that parallax mistake is not so usual so the biggest advantage of SLR cameras is exactly the fact of being able to change its lens and then you have a bigger variety of creative options. Not even the manual functions could be a reason to determinate the SLR cameras as the best because some of Point and Shoots ones have complete functions. So the most important is to wonder if your necessity is simpler and compact equipment or a fancier and hard portability one.
Whys does my camera have high resolution but the image in the display is not good?
That can happen if you buy a high resolution camera above 5 or 6 megapixels and if you get frustrated when you realize the photo is not so good as you thought it would be. Actually it is just an impression. At the moment you send the photo to your computer you will notice it has more definition than you thought! It happens because even if the camera has a good CCD sensor, sometime the manufacturer uses a low resolution display only to decrease the equipment costs. Imagine numerically a photo with 1.300 horizontal pixels and it has to be showed in a small display that reproduces only 300 pixels. That is what usually happens. That is why you don’t have to worry about it. Make the test and check if the photo is better in your computer than in the camera display.
Why does the camera take too long between one photo and another?
Many times we get frustrated because we realize we missed a good photo only because our camera wasn’t ready to take another photo. That can happen for two reasons: one is the processing time and two is the recording time. The processing speed depends on the processor technology and it is the same as how the computers work. The difference is that each manufacturer develops his own processor and it is now possible yet to compare directly quality and speed functions. The recording time depends only on the used memory card. A few people know but the memory cards are not just classified by their capacity but also by their recording speed.
What is the best: optic digital zoom?
The camera capacity of searching for distant objects is classified by its optic zoom. To understand it better it is enough to say that optic zoom is done by the len’s move. That means the approximation happens before the camera CCD processes the image. When it gets to the highest len approximation level the digital zoom is triggered and so if the image that had only 2.500 horizontal pixels, for example, may double its size through the digital zoom it will have only 1.250 pixels. That means once the digital zoom is triggered worse the image resolution is.
What is the best battery for digital cameras?
This is a very particular point and it doesn’t please always every one. In our opinion the most convenient battery is the rechargeable AA known as the little battery. We say “convenient” because the point we are talking about is not its duration time or flash reloading but its simplicity to easily find its battery in any bakery, supermarket or convenience stores. The lithium ions battery are also very good but they are more expensive and if you have a loaded spare battery you will not have any chance to find another one during a travel.
What is the maximum possible size to print a digital photo?
Para cada resolução de imagem digital existe um tamanho máximo possível para impressão, que muitas pessoas chamam erroneamente de “revelação”, sem perda de definição. Mas é preciso prestar muita atenção porque uma câmera de 3.2 Megapixels, nem sempre consegue imagens em sua resolução máxima, assim como uma câmera de 5 MP, mesmo em seu ajuste mais preciso, às vezes pode conseguir imagens de no máximo 3MP. Por isso, na hora de “revelar” suas fotos, tente descobrir o tamanho real da imagem e não apenas a capacidade da sua máquina. 1.2 megapixels 10X15cm. 2.1 megapixels 20X25cm. 3.2 megapixels 24X30cm. 4.0 megapixels 30X40cm. 5.0 megapixels 40X50cm. For each digital image resolution there is a maximum possible size for printing and many people mistakenly call it “reveal”. But you must be attention because a 3.2 megapixels camera doesn’t always get images in its highest resolution just like a 5 MP camera which sometimes even in its perfect adjustment gets at most 3 MP. So when you are “revealing” your photos try to find out the real image size and not just your camera capacity. 1.2 megapixels 3,94 in x 5,91 in ; 2.1 megapixels 7,87 in x 9,84 in; 3.2 megapixels 9,45 in x 11,81 in; 4. Megapixels 11,81 in x 15,75 in and 5.0 megapixels 15,75 in x 19,69 in.
What is the use for the ISO adjustment?
A long time ago the ISO adjustment in the film cameras were also called ASA adjustment and both had different numbers. The ISO were measured in degrees and ASA was measured in the same nomenclature we know nowadays. So people started to use ISO name but with ASA number. Basically the word ISO comes from the Greek work isos that means equality. This terminology was created by the International Organization for Standardization, a world organization that creates standards so the whole world can work with the same quality defaults. So the ISO 5800:1987 determines what the light sensibility each film must have is. By the way someone should have already thought about ISO regarding shoes, don’t you think? Whatever, in a few words the ISO determines how much light is necessary to take a picture. As bigger as the ISO number is more sensitivity and less light is necessary to capture an image. So you wonder: so why don’t we always use the biggest ISO? And the answer is for each sensibility raise a little image quality is lost and also it raises the information quantity (file size) of only one image. Some time ago this quality loss was known as “granulation” because it was easy to notice the grains or points that compose the photo. Nowadays the problem is the same but it is known as “noise”. Generally the recommendation is to use the smallest ISO as possible if you are in a sunny day. That will make images with more vibrant colors, very blue skies and good skin colors. For cloudy days and indoors places with a good light you can use ISO 400. For night events when it is not possible to hold the immobile camera for a long time, use ISO 800 with or without flash.
