21 How to buy a digital camera.

 This article is to guide your decision.

1. Budget.

First, let's see how you set a budget for how much. To buy a digital camera mate, because market prices range from a simple camera. For a few thousand baht We do not have much. Which is obtainable from the other thousand. Sort them according to specification. And a better quality of the hundred thousand or several hundred. When a statement like that. Two thousand are looking for a camera that is in our budget. Models with higher prices, such as 4-5 thousand would not be considered to be a headache.   2. Image sensor.

If the specification is usually written as Image sensor or Image recording say it is a device used to capture the film itself, some brands use a CMOS, but most or almost all of the CCD, some big some small, but bigger than a small advantage. The details are (more expensive) may be viewed from a specification that uses a 1/1.8 inch CCD size, 1/2.7 inch or 2/3 inch (measured diagonally).   3. The depth of color and Bit Depth.

Maybe it's the Color Depth is the depth of color, the more likely it is to keep the details of the colors is more like 10 bits / color or 12 bits / color, meaning that the natural color has three colors RGB is a color display 13 bits. three 36-bit color, it will be a high-end cameras may be up to 16 bit / 48 bit RGB color or dock with slide film that I know. I do not know why the camera brand. Some said that only the camera itself, how much depth of color. If the camera is low, such as an 8 bit / color (actually it's not because the 24-bit RGB color display 16.7 million colors) I do not want to talk about. The camera will show the project to see if anyone else had to go over well. The color separation is not as good as it should, like flower petals, red, dark red, medium, and red light. See with the naked eye, it's the color gradation. However, if taken out of the red color. If the slide film to get close to the eye. (Slide Pro can do better).

4. The resolution.

To the Effective Time to buy a digital camera, we often hear people say that this is 3 megapixels 4 megapixels, but the resolution of the image sensor. Actual size is less than that. See specifications in the manual or brochure for the Effective This is a picture really is a brochure that 5.24 million pixels, but the specs indicate clearly that the size of the largest is 2560 ?. If by 1920 pixels, it will have 4.9 million pixels.   5. Interpolate.

Some types of cameras. If we look at an image size of the surprise factor out of it. Resolution than the CCD 3 million pixels, the image size up to 6 megapixels is because they use certain technologies to increase the resolution to increase it, such as the Super CCD's Fuji or HyPict of EPSON, but the quality is not equal. real resolution of the CCD, however, it can be considered enhanced by a better technology to help. With the image resolution with Microsoft application software such as Adobe Photoshop, the quality will deteriorate significantly increase the resolution to 1 foot this way, we are often called Interpolate the camera with sound. these functions. The menu, select whether to use or not.

6. To reduce the image size.

The camera has a resolution that is good, but do not forget that the file size will be. It is very much a New Maureen card. If the 16 MB capacity card at a 3 megapixel camera to shoot a few pictures, it is full. The high-capacity cards. Sometimes we just want to send a reminder email or otherwise use the site, which have lower resolution with Photoshop or other programs to just 640 x 480 pixels or smaller. However, most digital cameras is the image in various ways. To suit the work to be used, such as the Olympus E-20 to 5, with the smallest size at 640 x 480 pixels and so on.

7. A response, or Response.

This is almost all digital camera is not listed in the specification of the camera itself, but if I have a camera, Canon EOS-1D or Nikon D1x will be featured. I do talk to the brochure. Both of these responses from the switch, ready to hit the camera and shoot Peter Sutton. It takes less than a second, almost equal to the camera's autofocus 35 mm film ever. (Faster than compact cameras, 35 mm) makes it feel like a digital camera or film.   8. Buffer.

The more the better. The buffer memory in the camera or other photography will allow. Is a constant that is, after we press the shutter to take pictures. Image data through image niobate is put into place before the next card. (As I often use green or red flashing warning to the plane), this method allows us to capture it. Do not wait to finish record card before. If the buffer, it will take to it quickly, and multiple images the same as the specification cameras that capture the fast 3 frames per second consecutive straight 10 This means that if a 10 will hit Sutton. later, did not. Because the buffer is full. I have to wait for the card. When there is enough space for another shot. Without waiting for a full 10 card images in the camera before Nikon D1x and the Canon EOS 1D buffer excessively Peter Sutton on the image to be magnified view different parts of the image, or delete it immediately. I do not have to wait. Some brands may have to wait for a minute before playback.   9. File Format RAW.

If you have a good high-end cameras have high resolution. The forum format called RAW to choose from JPEG or TIFF because in format RAW to store the color depth is better than the Nikon D1x format in RAW is 12 bits. / I is a JPEG is only 8 bits / color, etc. They also have a smaller file. The quality is not reduced. However, the images must be used with Microsoft's software that comes with the camera. The images in RAW format images can also be customized or modified so as to shoot again. For example, the image brighter or darker. Adjusting the white balance, etc.   10. White balance or white balance.

This function is available in digital version. The past, we will make good white balance in camera, which uses a CCD camera as well. Most have automatic white balance. The photos are colorful. The outdoor shooting or other low light conditions. With different color temperatures. If a film camera, which is balanced with a light lunch with a color temperature of 5000-5500 degrees Kelvin, the images with accurate color. When shooting with a light lunch or a light flash only. If the indoor temperature will be higher with a blue tone. The evening will have a low color temperature orange-red color. The camera will correct color, and has always set the Preset to various lighting conditions. The model chosen is not the same as exposure to sun light, indoor light, Power Blue Orange Senses indoor lighting, tungsten, etc., some cameras have a bracketing White balance is to shoot 3 or 5. consecutive images, each image has been changed to different color temperatures. Then, select a specific image with the most realistic colors. The color temperature is adjusted by the user application software supplied with the camera.

11. Small digital compact camera.

Save to a 35 mm single lens can zoom up to 2-3 times it will zoom the 35-70 mm or 35-105 mm and so this figure is compared to a 35mm camera. m not really looking at the lens. It identifies a number less than the CCD is much smaller than the film itself, like the Minolta Dimage 7 7.2 to 50.8 mm, equivalent to 28-200 mm lens is a zoom lens with wide angle than most. Is useful to have a better start to narrow 28 mm or 30 mm

12. Digital zoom.

Features that it does not matter what time of Advertising Digital Zoom Optical Zoom, see how little is mentioned in the specification, such as 3x is 3 times as wide as the range of 30-90 mm lens. And I say that with 2x digital zoom and a 6x zoom and a 30-180 mm, but in fact, the digital zoom range up to 180 mm, the size is smaller with a 3-megapixel resolution. Digital zoom is only 1.5 megapixels, zoom, etc. It is not that good. The resolution is the same if you use the Optical 3x zoom camera with 3 megapixel camera and remove the crop or crop the remaining 1.5 million pixels of the image was taken with a zoom lens, 6 as well, but if used. Digital zoom in the first place, it is more convenient in that it does not need trimming later. When using the digital zoom and camera quality is not reduced. (Reducing the image size) with a video camera. The digital zoom is much more rough. Because the image is then enlarged it.

13. LCD monitor.

It is known that the device consumes battery power. This is because the energy from the battery to reboot. Size does not apply. Turn left at the Oval, not long battery purchased a new or fully charged, it runs out quickly. A good digital camera to adjust the brightness and color is natural. This enables the color management on your computer. The color printer is a smooth match. View Monitor the distortion. (Although this is the correct color on the computer) then I would think that the frustration will come out distorted on the screen. Do not forget that the concert has a zoom function to be taken or not. And zoom much. The more the better, up to 100%, it is best to see the full picture. Contrast that to each point of it. Depth of cover up or not. If not, it has taken some new models like the Sony DSC-F707 camera, designed to turn the camera lens. Result in high or low angle shots. Some turn to spin around like a Canon G2.   14. Optical Viewfinder.

The image on the monitor consumes battery power, we should see an image of the optical instead. Because only a small amount of energy relative to the focal length of the zoom lens of a camera, but some have a viewfinder, so this should make a good concert. The disadvantage of the optical viewfinder is not looking through the lens. The shooting occurred near the disparity between the image above without exceeding the limits shown. If you take pictures of monitors instead would be better. However, some cameras have a monitor for your picture taken with the menu only.

15. Record audio into the image file.

This feature is only available on some camera models. But very much. The recording time is 5-15 seconds which was enough to remind me to talk about such place, date, time or other as required. You can listen to the playback mode of the monitor or computer.

16. Video clips.

Some digital still cameras shoot movies with a similar pattern with the camcorder. However, most have very small as 320 x 240 pixels, but some models like the Fuji FinePix S602 video size is 640 x 480 video online. Some movies only. However, some models can record sound. Format images in both MPEG and QuickTime by shooting at a speed of 10-15 frames / second video, so I look a little jerky. The file size is very small. Ideal for sending pictures by email. If the view of television cameras, not a small version of a software format MPEG EX video clip for a limited time. Depending on the card.   17. Focus.

Almost all digital cameras is auto focus. Work and some do not vary much with a particular focus in the center of the image, but some have three or five points across the image. No matter the style or whatever you want to be in any position. The precise focus. The camera will automatically select the focus point. Or choose your own, but sometimes we need to use manual focus. For some special effects. Manual focus is available with a specific focus distance. The error-prone. Some cameras have a rotating focus ring would be more precise. This is similar to the SLR camera to infinity mode. (Mountain symbol) for shooting at a distance. The camera will shoot up because they do not need to adjust the focus. And should consider whether or not the macro mode. Although some cameras shoot close to a few centimeters. But the shooting range, wide-angle zoom. (The video) is not very good as the tele macro. The zoom lens at the telephoto camera's view. See how much.   18. Flash.

Most digital compact camera with a built-in compact flash. When the light is too small and has a flash and slow shutter speed. Makes use of flash photography at night behind a solid black shutter or flash, the second to the motion picture special effects. Flash with red-eye reduction when using a straight shooting people at close range. It is great if you use an external flash, the camera models from manufacturers such as Canon Minolta and Nikon film camera with flash with hot shoe connector. The flash of the camera for 35 mm using a high efficiency of up to

19. Cameras System image.

For functional imaging, it is not much different from film cameras, mostly. The system is automated. The camera selects the appropriate shutter speed and aperture. If the light is adjusted to a higher sensitivity. (Sensitivity auto mode), it is easy to use. If you have knowledge of imaging techniques may be used auto-shutter mode. Auto or manual exposure. The system also features automatic compensation. If you have pictures or historical images of light are fitted. There is also a bracketing system. The cameras will shoot the 3 or 5 frames in each image with different exposures, as specified. Some models have hidden bracketing system to create something special.   20. Sensitivity.

ISO digital camera or film camera with a significant advantage in terms of setting. The EV. If a compact digital camera that is cheap. There may be sensitivity to ISO 100, however, like almost all digital cameras will adjust the ISO 100-800 sensitivity as well as an auto when shooting in low light conditions. Camera sensitivity is higher. The shooting without a tripod. However, the high sensitivity of the overlap of the Noise increasing, respectively. Some models have a listen to it with a Noise Reduction Noise Redution or you can adjust the sensitivity to the manual one.   21. Battery.

Digital Still Camera. Require more energy than film cameras several times because the system is electronic. Controlled by a computer and a monitor for viewing and playback power consumption is quite large. For users who are not familiar might be surprised when the new battery. shoot a few dozen pictures battery out and then restart it. If the camera is to use a AA battery, which is a series of alkaline and lithium. It is recommended to use rechargeable batteries and Ni-MH to work longer. And should be a kind of power, such as 1800 or 2000 mAh batteries are rechargeable tree species from 500 to 1000 times more than the savings. The camera, Battery Pack, MA Li-MH or Li-on supplied with the camera works great, but it is a battery-backed one or more pieces. In case of emergency. Switches to battery power is generally not the same as the camera batteries Three AA.

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