Digital Photography: In Focus
Imagine taking pictures and printing those moments later. Unleash the power of digital photography and this is what happens. All that are required for taking a digital photograph is a digital camera, a PC, a USB connection to the computer, a printer and a photo-editing program. The first step in taking a digital photograph is to familiarize yourself with the digital camera. Now, do not get frightened! Here is how you can deal with it.
All about a Digi Cam
Pixel
This is short for picture element, the smallest piece of a digital image. A pixel is also referred to as a single point in a graphic image. These elements are the building blocks of your picture, similar to floor tiles or the squares in a mosaic. Put millions of these tiny squares together and you have a digital picture. In fact, “megapixel” is a simple way of saying one million pixels.
Resolution
This refers to the number of pixels in an image. The more the pixels in a digital photograph, the more detail the digital photograph can contain and better the image quality. It also refers to the sharpness and clarity of a digital photograph. It is measured in Mega pixels. One Mega pixel is equal to one million pixels. A low resolution refers to less than 1 mega-pixel, high-resolution refers to greater than 1 mega-pixel and advanced high resolution is 4 mega-pixels or more. In Digital Photography the resolution of the camera is the most necessary feature to produce first class photographs.
Auto Focus
A good choice for general picture taking is auto mode. This setting, allows your digital camera to automatically set the exposure, the focus, and the flash. With auto mode, you may override the automatic options of the flash and choose to turn the flash off, use fill flash, or red eye reduction.
Digital Zoom
This crops your image and magnifies the result of the cropping. This magnification process is called interpolation. Sacrificing image quality to capture the moment is more important than not getting the picture at all.
Optical Zoom
This physically tends to magnify the subject. A motor controls the lens movement. When you press the switch to W or T, the subject is either magnified or reduced in size. They are wide-angle (reduce) and telephoto (magnify) respectively. This allows you to view the subject before taking the picture.
Memory
It denotes the number of images stored in the camera.
What is up next, regarding the components that are drawn in with digital photography?
Items associated with Digital Photography
Computer
Keen to know the task of a computer in Digital Photography! The Computer is the vital component in Digital Photography. It does the most important task of storing and displaying digital photographs from the digital camera. It allows those digital photographs to get printed onto an array of digital printers that are available.
The display monitors
The display monitors shows you the images in a broad range of colors. However the image can be seen in different looks when viewed on various display monitors. It is for this reason that it is advised to set the settings of the monitor to the default values as set by the manufacturer.
Printers used for Digital Photography
This prints the image on a photographic paper. Inkjet, Dye sublimation and Thermo Autochrome are few of the Printers used in Digital Photography.
Now you know it all. Digital photography is no longer a stranger!! So, start clicking away.
John Darby
http://www.articlesbase.com/technology-articles/digital-photography-in-focus-63293.html
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I can’t get 100% focus in digital photography?
Hi, before I used two different Canon Rebel XTs with different lenses. And Now I use a canon 30D. I can not get 100% focus with group shots. I also have a hard time landescape.. basically anything but close portraits. Why is this happening. How can I fix it?
Sounds like a depth of field problem if some parts are sharp and others out of focus
It could be you are becoming more critical of your own work, a good thing.
Try using a smaller aperture.
Lens performance also trends to drop off towards the outer edges.
References :
http://photography.suite101.com/
Most digital cameras have auto-focus. Check your instruction manual or the menu to make sure you have this feature turned on.
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Nobody really "gets" digital "100%"; It has kind of been forced on us…like Chinese pet food and $3.45/gallon gasoline.
Make do and carry on if you can.
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a new camera will solve EVERYTHING!>.
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Virtually all small format digital cameras require some sharpening in post process and that inlcudes the Canon’s I shoot with, which cost thousands more than the Xti. It’s because the processing done in camera softens the image. A slight amount of sharpening will help with this, since it isn’t a lack of focus, but a lack of local contrast.
Another problem may be that your lens has a backfocus or forward focus problem. Backfocus is the most common, but both can occur. It’s rare with Canon lenses, but it can occur with them just like it can with any other lens. It is much more common with third party lenses like Tamron, Sigma and to some extent Tokina (all of which make some excellent lenses). The only thing that can be done if this is the case is to send it in for service. All of the companies are pretty good about correcting this problem. You can lookup backfocus using google and decide from that if you have a backfocus problem.
The 30D should give you a higher quality image than the XT’s since it’s basically a 20D with some bells and whistles added. Unless you are doing something wrong, it sounds like your focussing system is out of alignment if it’s not a matter of sharpening the image.
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If you are using auto or program stop. You need to go manual or aperture priority for more DOF. Groups try for an f11.
A sharpening solution in PS might be a high pass filter overlay of about 3.
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I believe you’re having some exposure issues, rather than focus… try using a tripod.. use the AV setting and set your camera to f22…. shoot your landscape, and see if you have 100% focus then.
I’d suggest getting the book "Understanding Exposure" by Bryan Peterson. It will explain everything you need to know about exposure and foucs, in easy to understand language.
For your group shots, I’d suggest using a setting somewhere between f11 and f16.. use M mode and adjust the shutter speed til the exposure is correct. Use your flash and see what your results are.
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Technically it’s absolutely impossible to get 100% focus. Now I’m not going to go into a long explanation about that, but what I think you mean is that your having depth of field problems.
Stop the lens down. If you want everything in focus put the lens at f/22, and make sure the shutter is above 1/125.
That should solve your problem. If it doesn’t you need to get a new lens…seriously because that ones broke.
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Perki has the right idea. Your DoF (depth of field) is too shallow. Change your aperture, in either aperture priority or manual exposure modes to f/8-f/11 and your lens will have a DoF long enough to keep objects on the same linear plane in focus.
By the way, f/22 is not neccessary for group shots, only when you want both the background and foreground to be in perfect focus. What you want is to still be able to separate your group from the background, for less compositional clutter but still retain a DoF long enough to have focus on one linear plane at a specific distance from the camera. You stop down to f/22 and the background will distract from your subjects and it will look more like a snapshot than a nice group photograph. That’s my opinion.
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First of all, you need to know that it is absolutely impossible to get perfect focus in digital photography. Even if you can focus perfectly in the camera, you still have to sharpen in post-production.
Second, this shounds like a depth of field problem. Higher apertures (f-stops) have more depth of field. Use the highest aperture that you can.
The apertures are: F1, F1.4, F2, F2.8, F4, F5.6, F8, F11, F16, F22, F32, F45, F64, F90, etc.
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