Digital Cameras Let’s learn to read and understand what is written on the packaging to find out exactly what we are buying .
The characteristics of the best cameras
Resolution “ This digital camera has no less than 6 Megapixels ” Could you tell us any committed , not lying, but maybe omitting something :
The first thing to look at , in fact, if the resolution is expressed in megapixels real or interpolated . In the second case , in fact , things are very different because the interpolation is carried out by a software modification that “fixes ” the photo making it as similar as possible to an image taken with a camera with a higher resolution. Unfortunately, the effects are not always the ones you want , and sometimes it is preferable to choose a template a bit ‘ older but proven quality , with good optics , and some Megapixel less ( spend less and you’ll most beautiful photos ) . Specifically, the resolution is given by the amount of “points” in which the image is split , the more the more the image is well defined ( in the case of Kodak DX763 is the maximum resolution of 2856×2142 pixels , or 6.1 megapixels ) and obviously , increasing the resolution will greatly increase the price , but if you have no claims professional , you can easily stay on 3 megapixels.
Zoom Another question is related to the delicate zoom , optical and digital distinguishable : the first is to guarantee real optics of the machine and is one with which we will get the best photos ( Zoom 3x higher than in non-optimal lighting conditions , still recommend the use of a tripod or any support base ) . The digital zoom magnification instead is a software which , in addition to not ensuring qualitative yields extremely high , virtually obliges the use of a tripod . Also in this case the zoom ( optical) is one of the discriminating going to weigh on the final price , if you think that carrying around a tripod is too uncomfortable or do not plan to take pictures of faraway subjects choose a model 3X .
Auto Mode Digital cameras have accustomed us to a photograph ” point and shoot ” without too many complications (there are also those , for those who can not stand the idea of not having full control on your device ), the symbols that we see here indicate the different preset modes , or macro, photo on moving subjects and portraits at night. By now all the machines on the market have the ” preset” like these to help the photographer to not get lost in dozens of settings mainly because only devices with a certain level you can manually set the shutter opening time and then be able to resume parties in situations completely different from one another ( for photographing a moving car , for example , we will need a very short opening time , otherwise the object will be moved ) .
Print quality Indica, in this case, the maximum size that can be printed once at our photos (obviously with a high quality performance yet ) and is indicated both in inches and centimeters.
Sensitivity Some cameras also allow you to change the type of film that, in theory , the device is using , thus changing the sensitivity to light and allowing us to photograph in any situation , we can usually select 50, 100 , 200 and 400 ASA until you get to more sophisticated machines that allow you to get to 800 (like Kodak) 1600 although , unfortunately, already 400 ASA the “noise” of background on this photo making it lowers the quality preferable in low light , a steady hand and lower sensitivity .
White Balance In the presence of different lighting conditions the digital camera always knows how to ” behave” thanks to the balance of the white point , a sort of automatic filter that tends to identify the points of this color in the scene and to make them neutral , with no gradients color that would compromise our photos. In this case the two symbols we indicate the presence of selections for artificial and natural light .
In this case, the video camera can also record movies with real sound. The maximum resolution is not specified but usually no more than 320×200 pixels ( 640×480 you get in some special cases) ; certainly can not replace a real camera , but can be useful in some cases.
Features proprietary These symbols represent some special features of the Kodak but are not present on machines made by other manufacturers , at least not with these designs. Indicate, respectively, the Kodak Color Science Chip, the possibility to mark the photo as a print or send via e -mail ( once connected the device to the computer operations will be carried out automatically) , the ability to rotate images and the possibility to connect the camera directly to a printer without going through a computer.
Autofocus The focus is the operation which allows , acting on the position of the objective lens , to decide which part of the image will be
perfectly clear in the photograph. The cameras are more simple fixed focus , ie the position of the lens is predetermined , and consequently also the area that is in focus. Most of the machines instead mounts a circuit which controls the autofocus lens so as to make clear the subject in the center of the photo. We distinguish the active autofocus , which works by projecting an infrared beam on the subject and measuring the rebound, and the most sophisticated passive autofocus , which automatically adjusts based on the image contrast with the background (possibly with the help of that light microlampi better the subject) . The more sophisticated autofocus can use more sensors (not just at the center of the photo) and ” chasing ” moving subjects , keeping them sharp while moving .
Batteries and memory Another point to keep in mind when buying a digital camera is the battery type and how much memory is used to store our little masterpieces . By now , almost no manufacturer uses batteries ” AA ” normal , because, between flash and display the maximum you had an afternoon of autonomy and there you could be forced to buy rechargeable batteries, the path taken by the manufacturers is to equip its jewelry rechargeable batteries ( lithium often ) and proprietary (ie salable and can only be traced from the manufacturer itself) that , on the one hand they offer a good savings , are very expensive if they are to replace.
As far as the storage media the question becomes a bit more tricky especially when you are buying digital cameras and more from 6 Megapixel photos taken , in fact, occupy a lot of space and we will soon be forced to buy a card to replace the ” standard ” . Given that prices vary from type to type , before we check what type of memory card using our device , so you already know how much we’ll be able to spend to replace it and so save a little.