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.. Pro Digital Hard Lens Hood For The Sony ALPHA DSLR-A900, DSLR-A700, DSLR-A350, DSLR-A300, DSLR-A200, DSLR-A100, Minolta Maxxum 5D, 7D Digital SLR Cameras Which Have Any Of These (16-105mm, 18-200mm, 70-300mm, 24-105mm, 16-80mm, 18-250mm) Sony Lenses $9.95 The Lens Hood is one of the most important accessory you need for each lens you own.A lens hood provides multiple functions: preventing image-degrading lens flare by blocking stray light from striking the surface of the lens, it enables your lens to give you the sharpest photographs with the best contrast and most vivid colors, in inclement weather, it can assist in keeping moisture or wind-blown … |
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Sigma 17-35mm f/2.8-4 EX DG IF HSM Aspherical Super Wide Angle Zoom Lens + Hoya 77mm UV Haze Protector Glass Filter + 6-Piece Cleaning Kit + Spudz Microfiber Cleaning Cloth – for Konica Minolta Maxxum 7D & 5D and Sony Alpha 100, A100, A100H & A100K Digital SLR Cameras Kit includes: 1) Sigma 17-35mm EX DG IF HSM Aspherical Zoom Lens; 2) 6-Piece Cleaning Kit; 3) Sigma Spudz Microfiber Cleaning Cloth; 4) Hoya 77mm UV Protector Filter. ♦ Sigma 17-35mm Lens includes: Front & Rear Lens Caps; Lens Hood; Instructions; Sigma USA Warranty. ♦ The Sigma 17-35mm has an internal focusing system which eliminates front lens rotation. This makes it easy to use with … |
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GSI Deluxe Lens Cleaning Pen System, Cleans all Camera Lenses, Telescopes, Binoculars, LCD, Plasma, Screens, Watches and Flashes from Dust, Dirt and Fingerprints – Pocket Tool. $0.35 The GSI Lens Pen Cleaning Pen System is a great accessory for any optics user, making it great for maintaining your digital or film camera, binoculars, telescopes, or spotting scopes. The soft retractable brush removes fingerprints, dust and other debris that may compromise your lens. The small, pen-style design easily fits in any camera bag, as the soft brush retracts into pen body to stay clean…. |
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Minolta DiMAGE Scan Dual II Film Scanner $595.00 If you’re serious about image scanning, don’t give the job to just any old scanner. With its high resolution, 12-bit analog-to-digital conversion, and a 2,820 dpi maximum resolution, Minolta’s Dimage Scan Dual II is poised to render sharp, satisfying images from a wide range of film types. Give it positives and negatives in either 35mm or in the Advanced Photo System format–or on mounted 35 mm fi… |
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Minolta Dimage Scan Multi Ii Film Scanner $2,395.00 Combining impressive hardware technology with versatile software applications, the Minolta Dimâge Scan Multi II film scanner is indispensable for both imaging professionals and avid amateurs. Its software driver offers nearly 600 automatic settings in nine categories with additional customization easily possible. Working with a variety of Macintosh operating systems, it functions equally well on … |
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Minolta Maxxum 7 35mm SLR Camera (Body Only) $599.99 Maxxum 7 35mm SLR Camera Body (Lens Not Included) ***OPEN BOX*** This NEW product you are browsing has been inspected by our certified technicians to ensure that it meets factory specifications; it is guaranteed to be in perfect working order.The Equipment is sold in AS IS condition and returns will not be accepted so please contact us with any questions BEFORE placing an order at 1-800… |
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Tamron AF 70-300mm f/4.0-5.6 Di LD Macro Zoom Lens with Built In Motor for Nikon Digital SLR $199.00 The Tamron 70-300mm f/4-5.6 Di LD Macro Autofocus Lens is a quality, compact ultra tele zoom which covers the 70mm to 300mm telephoto range, with a macro magnification ratio of 1:2 (1/2 life size) at the 300mm setting — ideal for shooting subjects that are difficult to approach such as sporting and theatrical events. This lens also features a built-in motor for use with Nikon Digital SLR Cameras…. |
Minolta X-700 35mm SLR Camera & Lens 50 mm, 1:2
Minolta SLR Camera Lenses
How Do I Know What the Hyperfocal Distance Is?
I assume you’ve read last week’s newsletter, but in case you want the digest version, here it is: The hyperfocal distance is where you can focus the lens to get the greatest possible depth of field.
Now that you understand the basic concept, you’re no doubt wondering how to apply it. After all, knowing that the hyperfocal distance will enable you to capture uniformly sharp photos is pointless if you don’t know how to determine the hyperfocal distance to begin with.
Well, I have some good news and some bad news. The good news: This information is readily available. The bad news: You might have to work a bit to get it.
It can help to understand some photography history. Old SLR film cameras used to have depth of field information inscribed right on the lens barrel, making the hyperfocal distance easy to determine on the fly. Check out this photo of my trusty old Minolta 55mm lens, which my dad handed down to me for my first film camera. This lens was probably manufactured in the 60s, making it as old (or older) than me. As you turn the barrel to focus the lens, the diamond-shaped marker showed you the actual focus distance–in this case, it’s 10 feet, or 3 meters.
Surrounding the focus diamond are lines that show the depth of field at different f-stops. As you might expect, bigger f-numbers correspond to deeper depth of field. At f/16, you can see that everything from about 7 to 20 feet will be in focus. At f/8, you only get about 8 to 14 feet of sharpness. (It’s hard to be precise when reading numbers marked on the side of a lens. I’m approximating.)
Finding the hyperfocal distance on these older lenses was a snap. Focus the lens until the distant depth of field marker for your desired f-stop just touches infinity. That’s the greatest possible depth of field this lens can muster at this f-stop, and thus is the hyperfocal distance. In this example, if I focus around 20 feet, the depth of field at f/16 will go from 9 feet to infinity.
I think using these older lenses to visually demonstrate hyperfocal distance is a good way to learn, because it graphically shows that the hyperfocal distance at any given aperture setting is the minimum possible focusing distance at which the depth of field extends to infinity. Obviously, you can still set the focus farther away if you choose to, but if you do that, the range of sharp focus can’t get any bigger, and so you’re just wasting depth of field “beyond” infinity.
Modern Hyperfocal Cheats
That’s nifty if your camera lens has depth of field markings on the barrel, but I am afraid those days are pretty much gone. So how do we figure out the best focusing distance using modern cameras?
Thankfully, there are a few tools at our disposal. You might start with an online depth of field calculator, like the excellent one at DOFMaster.
To use this site, start by entering your type of camera–this step is critical because the size of your camera sensor affects the effective focal length. Then, set the details about the lens you’re using, including the focal length and f-stop. Now you’ll need to do some fiddling. Enter a subject distance and check the near and far limit on the right side of the page.
If the far limit is not infinity, make it bigger. If it’s already infinity, make it smaller. Try a few values until you just hit infinity. Now you know the distance you should focus on to get the best possible depth of field. You can also note the near limit of the depth of field, so you can be sure to position yourself for ideal sharpness of all the important parts of your photo.
Of course, you’re not always taking photos within easy reach of your computer, so you can check out an online depth of field guide. If you have a smartphone, there are a wealth of free and inexpensive depth of field guides you can get as well. Recently, I searched for “dof” in my iPhone’s app store, for example, and found a dozen candidates. I personally recommend the $2 DOFMaster, from the same folks that bring you the Web site I mentioned earlier. Not only does the program tell you the depth of field for any focusing distance you enter, but it can also display the hyperfocal distance with the tap of a button.
Leap of Faith
Shooting photos the hyperfocal way can be a little scary the first few times you do it. It’s a bit of a leap of faith to take a photo when you’re not focusing on either your near or far subject, but rather at some indeterminate distance in between. Intuitively, it feels like you’ll just end up with an out-of-focus shot. Don’t forget, though, that if you’re shooting with a digital SLR, you probably have a depth of field preview button that you can use to ensure your photo will be sharp before you take the photo.
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The World of Digital Cameras
A digital camera is a camera that captures images on a light-sensitive sensor. It can record video or still photograph, or both. It has many features that are not available in film cameras such as displaying an image on the screen right after it was taken, the capability to save thousands of pictures, the ability to revise and delete images, and record video with sound. Nowadays, digital cameras are integrated in almost every high-tech gadget like PDA’s, notebooks, mobile phones, and even astronomical equipment.
Nearly every digital camera uses some kind of storage device to store image data. Some of the most common removable storage tools include CompactFlash (CF-I), Memory Stick, Microdrive (CF-II), MicroSD, MiniSD Card, MultiMediaCard (MMC), Secure Digital Card (SD), SmartMedia, USB flash drive, and xD-Picture Card (xD). The general data formats for digital camera images are the Tagged Image File Format (TIFF) and Joint Photography Experts Group (JPEG). Though there are a number of cameras, particularly DSLR cameras, that support a Raw format. A raw image data is an unprocessed set of pixels found from the camera’s sensor. Some manufacturers have their own formats to save raw data. Nikon has NEF type, CR2 or CRW for Canon, and MRW for Minolta. If you are planning to buy a digital camera or already have one, you may want to check the types of digital cameras listed below. The more you know about your gadget, the better you can take advantage of its potentials.
Bridge Also referred to as SLR-like cameras, bridge types are high-end cameras that are sort of the combination of DSLRs and compact cameras thus called “bridge”. Models of bridge cameras currently out in market include the Fujifilm FinePix S100fs, Canon PowerShot S5 IS, Panasonic Lumix DMC-FZ50 and Olympus SP-570UZ.
Compact Digital For informal and “snapshot” uses, compact cameras are highly recommended. They are small and very handy but the disadvantage with this type is some functionalities are compromised. Mainly all compact cameras have built-in flash typically of low power, restricted capability for motion picture, and macro capability.
Digital Single Lens Reflex (DSLR) It is a type of digital camera that applies an automatic mirror mechanism that guides light from the lens all the way through the viewfinder eyepiece. One of the reasons why DSLR has so much popularity despite its very high cost is its ability to replace and attach specialized lenses based on one’s photographic requirements.
Digital Rangefinder A camera equipped with a rangefinder is called a rangefinder camera. It uses a focusing mechanism that permits the photographer to gauge the distance of the subject before taking the shots that are in sharp focus. This is in contrast with most digital cameras that have automatic focus. The first ever digital rangefinder camera is the Epson R-D1 which is the result of Epson and Cosina’s partnership.
Video Camera This type are used to record images in motion such as professional video cameras (used in TV and movie production); camcorders (used by beginners and includes a microphone to record sound); and webcams (for people chatting over the internet).
About the Author
Dori Kelsey
A Website www.instructionsmanuals.com where you can find and download instructions manuals for anything and everything.