Hello my friends. I didn’t post an article for a while, but here I am. In this post I will write something about image resolution, batteries and zoom lenses. Before you buy camera, please read this few advices and check sample images before you decide about you new electronic friend.
Resolution is expressed in megapixels and it represent the number of pixels contained on a camera sensor. One pixel is a one dot on image. More pixels you have, a bigger images could be printed, but….
You probably think that more megapixels mean better photos. Well this is not true. Sometimes producers will lie about this number (they interpolate pixels and generates images bigger then they should be.). Of course higher resolutions can sometimes help you to crop images more aggressively and correct your composition. Also you can print bigger images but resolution is not so important. Sometimes resolution is expressed as number of pixels on the horizontal axis and the number on the vertical axis. (For example 5Mpix, 2170×1760, etc.)
If you are looking for a new camera than probably 6Mpix will satisfied your needs. Standard prints are usually 300 pixels per inch (300dpi) and for 6Mpix image (for example 3000×2000 pixels) you will get 10â€x6.6â€ image. Choose a camera you can understand and afford, and remember that 10Mpix is not important if the camera produces low image quality.
A modern digital camera usually comes in two varieties. Some of them use AA-size batteries and the other uses their own (sometimes proprietary) lithium-ion batteries. With lithium-ion batteries you will probably get a charger but what if you are in the middle of nowhere and you donâ€™t have power outlet to recharge them. So the AA batteries could be a better option if you are a traveler – you can easily replace them. Dead batteries are the most annoying thing and good advice is to buy rechargeable AA batteries with fast charger. Sanyo produces the best batteries and the chargers. Ansmann is very good option to. If you’re out of high-performance batteries, you also have the option of using standard alkaline batteries, which are available anywhere in the world. Donâ€™t buy cheap batteries because they can damage your camera if they leaks inside. Avoid no name batteries and use Varta, Duracell, Energizer or similar hi quality batteries. Remember that before you use rechargeable batteries, you need to charge them. More about batteries HERE. If you want to read something about batteries technology, please visit Wikipedia. (believe me, it’s interesting )
Zoom is a term used with projectors and cameras related to the ability to change the view anywhere between near and far. Definitions for near and far vary from one device to another and some informations about this technology and basic physics principles could be found on Wikipedia . Zoom lens actually means “variable focal length” and you can never have too much zoom. The majority of digital cameras have 3-, or 4x optical zoom, but you will never regret choosing a model with more telephoto power. Now almost all digital cameras have zoom lens.
We can split digital cameras in two main groups. One group is for cameras with standard zoom option (2x, 3x, 4x optical zoom) and the other group is ultra-zoom cameras (10x, 12x, 15x). Fortunately the extended zoom camera category is growing rapidly, and there is a great selection of models with 8-, 10-, or even 18x optical zoom. For the ultimate in zoom control and quality, look for an extended-zoom camera with image stabilization, which will ensure that shots taken at full telephoto will be tack-sharp, even without a tripod. I suggest that you check image samples before you buy ultra zoom camera. Sometimes 18x zoom is not as good as it seems on the paper (visible image distortions, refractions, purple firing and similar problems characteristic for ultra zoom lenses.)
More about camera technology will be posted later. Now I’m working on memory cards, photo editing software, few tutorials about posting images online, etc.
Please coma back later if you like my blog, and please post a note at least. Also, if you have some ideas and you want to share with other please let me know. See Contact page