photo technique magazine: Variations on the Photographic Arts Current Photographer Megapixels for Digital Photo Printing at 200 Pixels Per Inch (ppi) How many megapixels (MP) are necessary to produce a high quality digital photo print? Though several factors affect print quality, this page focuses on image resolution, providing answers for questions such as: How many megapixels do I need for a 4x6", 5x7", or 8x10" print? If you are not familiar with the term megapixels, you may want to start with our How Many Megapixels Do We Need? Recommended Image Resolution Before we can answer the question of how many megapixels a digital camera should have, you must decide what print quality is acceptable to you. Print sizes up to 8x10" Common photo print sizes like 4x6", 5x7", and 8x10" are generally viewed at an arms length, requiring a higher resolution image for satisfactory results. 100 ppi - Poor to Fair 150 ppi - Fair to Good 200 ppi - Good to Very Good Recommended 300 ppi - Excellent Poster size prints Prints larger than an 8x10", also called poster size prints, are intended to be viewed from a few feet distance. Camera Sensor Shape
Camera Lens Care: Cleaning, Servicing & More From purchasing a camera to acquiring additional accessories, photography equipment is a pretty large investment for any photographer and it’s important to take care of your stuff. Keeping your lenses in top shape will make sure you continue to get great images out of them for many years to come. Lenses should last a very long time if properly cared for 1. Buy a UV filter As soon as you get a new lens, immediately buy a UV filter that will fit the front element. In the days of film, UV filters blocked ultraviolet waves, preventing images from having a blue color cast. Many things can happen to the glass on a lens, from scratches to greasy finger prints. 2. If you are using your lens outdoors, you will likely accumulate dust on the glass. Do not use any old cloth or a shirt tail. Typical cleaning supplies 3. Better lenses have some sort of weather seals to keep water and dust out. 4. 5. Trying to take a lens apart to clean it if you are not experienced in that sort of thing is a bad idea.
Aperture Foundation | Home page Irish Photographers Mirrorless Camera Lenses When it comes to mirrorless camera lenses, you've got options. The main reason that you've got options is that you actually CAN change the lens on a mirrorless camera if it suits your mood. From wide angle panoramic views to detailed close-ups, you can select a lens that goes along with your photography style, or to capture a specific type of subject. With the right lens adapter, you can also make your mirrorless camera work with a huge number of standard DSLR lenses. Since you do have so many options, it helps to have a basic understanding of lens jargon before you dive in. Focal Length The first mirrorless camera lens feature to pay attention to is something called focal length. Here's what focal length is all about: It should be noted that telephoto lenses also ENLARGE distant subjects. Here are some examples of different lens focal lengths: Most mirrorless digital SLR cameras come with a "kit" lens. Maximum Aperture The wider a lens can open, the more light it lets in. Lens Choices
Black & White Magazine Strobist Lighting101 (Photo by Strobist reader Sam Simon) Welcome to Lighting 101. You may not realize it yet, but you have just stepped through a door that may change your photography forever. Over the past few years, over four million people from nearly every country in the world have begun their lighting education right here. Photography is literally writing with light. You'll learn how to take the removable flash that you probably already have on the top of your camera and use it off-camera to make beautiful, more three-dimensional photos. The Good News: The Gear Doesn't Cost Much Basic lighting gear is also refreshingly inexpensive. You can even make a lot of light modifiers yourself for next to nothing. For the most part, it's the location of the light that is most important. Click on a reader's picture to learn a little more about how it was made. (Photo by Strobist reader Ken Brown) The difference between their photos and yours is that they already know how to use their flash off camera.
Depth of Field - Digital Photography Tutorial - Focal Length - Opinion The perspective-flattening of long lenses can also be used in other circumstances, because they also have the effect of reducing depth of field. You can use this to isolate a subject against its background by blurring it out, as in the shot below. Compare this with the same shot but taken with a wide angle lens from a much closer range. The relative size of the statue is the same in both shots, but due to the increased depth of field in the wide angle shot, the background, although apparently more distant, is much sharper. Because of this reduced depth of field, careful focusing with a long telephoto lens can pick out individual subjects amidst cluttered surroundings, such as a single person in a crowd. The same scene shot from the same position using a wide angle lens shows the street (High Street in Exeter) in a very different way.
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