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April 28, 2004 |
INSIDE THIS ISSUE
What's an SLR?
This week's news |
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PHOTOGRAPHY BASICS
What's an SLR?
By James Booth
You may have heard the term "SLR" tossed about, or seen it in an article and wondered what it meant. Well, sit back and I'll try to explain what an SLR camera is and why I think an SLR camera is far superior to point-and-shoot models -- whether we're talking digital or film.
The mystery revealed
So what is an SLR? SLR is an anagram for Single Lens Reflex. What this means is that the camera uses one lens that reflects the image to a viewfinder by means of a mirror.
You may think, "Well, duh, every camera has a single lens." Yes, these days, every camera you see has only one lens, but there was a time when TLRs, or Twin Lens Reflex cameras were very popular. That's right, two lenses. One lens was for viewing and composing the image, the other for actually taking the image. The most popular model was the Rolleiflex shown in Figure A. But now though, for the most part, cameras just have a single lens for both viewing and taking the picture.
FIGURE A
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The Rolleiflex TLR was the first reflex camera. Click picture for a larger image.
How it all works
How does all this reflecting work, and why is it better? Well, it all works out like this...
Light enters the front of the lens, passes through and hits a mirror. The image is then reflected up to a ground-glass focusing screen for viewing, and sometimes to a five-sided pentaprism and to a viewfinder. When you release the shutter, the mirror flips up out of the way, and the film or image sensor is exposed. Figure B illustrates how an SLR works.
FIGURE B
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My crude drawing shows how an SLR camera works. Click picture for a larger image.
The biggest advantage to the Single Lens Reflex camera is that you see exactly what the lens sees. What you see is what will be captured on the film or image sensor. When I got my first SLR, my dad explained it to me by saying, "What you see, is what you get."
To continue your SLR education, tap your mouse button right here.
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CONNECTED PHOTOGRAPHER NEWS CENTER
This week's news
Want to get the very latest photography news? The Connected Photographer News Center is updated every day with news of product releases, industry info, tips, techniques, and pointers to great photography resources on the Web. Here's this week's news:
Wacom PenPartner
Wacom's PenPartner is a compact pen tablet that allows you to navigate Windows and make handwritten notes using a pressure-sensitive pen. Targeted primarily at laptop users, PenPartner offers an alternative way of inputting data compared to a regular mouse.
Minolta DiMAGE Xg
Dave Etchells of Imaging Resource offers his quick review of the new Minolta DiMAGE Xg subcompact digital camera.
Mitsubishi digital color thermal printer
Mitsubishi is expanding its line of Digital Color Thermal printers with the new CP-9500DW, offering a print size up to 6x9 inch.
Hybrid RAW conversion
Jonathan Wienke of Luminous Landscape explores how to utilize a combination of RAW conversion techniques to produce images with expanded dynamic range.
DVD double layer burning
Roxio has released a downloadable update to its Creator 7 suite that will immediately enable DVD Double Layer (DL) data burning capabilities and allow consumers to nearly double the amount of valuable personal data they can record to a single DVD +R DL disc.
X3F Raw File support
Foveon announced that Adobe Systems now provides Foveon X3F raw file support with the free plug-in update for Photoshop CS reported on yesterday.
EOS-1D Mark II added to database
CompactFlash and Secure Digital write speed results for the Canon EOS-1D Mark II have been added to the CompactFlash Performance Database on Rob Galbraith's site.
Nikon Coolwalker review
Digitalreview.ca has a complete review of the Nikon Coolwalker, a portable storage and display device with a 30GB hard drive and 2.5 inch LCD display, suitable for storing and viewing roughly 10,000 6 megapixel JPEG images.
Pixort by JottoSoft
Pixort is a FREE tool for reviewing, comparing, sorting and culling photographic image files. It's dedicated to the initiation of a digital photography workflow where a photographer reviews their photos from the latest assignment.
Norman Phillips heads seminars
Norman Phillips, an internationally recognized master with over 170 awards from numerous Professional Associations and Societies, will be hosting seminars covering such topics as Posing, Lighting, Marketing, Photographing Weddings, and Photographing Children.
Email-sized Photo Album
AvailaSoft announced the availability of Photo2Album, new software for Windows that lets users design a 3D digital photo album that can store over 100 photos in less than 1MB for easy sharing via email.
New generation of scanners
BenQ announced the release of five new scanners, the 5150C, 5000, 5550, 6550T and 7550T. Following the heels of the BenQ 5250C, these five new models continue BenQ's tradition of bringing consumers stylish scanners, with functionality.
Photographer gets five months
Mark Ingram was jailed for five months by Southampton magistrates' court after pleading guilty to causing harassment without violence, unauthorized modification of computer material and an offense under the Computer Misuse Act for a 10-month hate campaign after a fellow photographer's pictures received more compliments on ePHOTOzine's user gallery.
Adobe Camera Raw update
Adobe has released version 2.2 of its Camera Raw plugin for Adobe Photoshop CS. More complete information can be found on Adobe's Photoshop product site under the Downloads section for your Operating System.
JPEG patent-infringement
Patent infringement issues surrounding the JPEG image standard resurfaced on Thursday after a small software vendor filed lawsuits against 31 companies ranging from Adobe Systems and Apple Computer to IBM and Hewlett-Packard. Forgent Networks has filed two separate patent infringement lawsuits in U.S. District Court for the Eastern District of Texas, seeking injunctions against the use of its patented technology as well as damages.
OptiSize for the Palm
Creative Algorithms announced the latest release of their OptiSize software for the Palm OS, an electronic version of a Photo-Mechanical Transfer whiz-wheel. This program is a calculator for resizing, scaling and reproducing photographs, images, documents, or any two-dimensional object.
Fujifilm Photo Day 2004
Fuji Photo Film is once again giving baseball fans across the country the unique opportunity to fulfill baseball dreams through photography. Kicking off on April 25 in Arizona, Fujifilm Photo Day allows fans to "take to the field" and photograph their favorite home team players and coaches.
Online photo coverage of Kentucky Derby
The "On The Road Again Live" Series, features live photo coverage of the Churchill Downs Collegiate Sports Seminar and the 2004 Kentucky Derby. To capture all the action, NikonNet and Photo District News (PDN) have assigned some of the world's foremost sports photographers to provide hands-on assistance to aspiring photojournalists from across the country.
Sigma Four Thirds Compact-Lightweight zoom
Sigma Corporation is pleased to announce the launch of the new 18-50mm F3.5-5.6 DC for the Four Thirds Digital SLR Camera System. Digital Photography Now has more information on this new lens from Sigma.
Sigma Four Thirds Telephoto Zoom
Sigma Corporation is pleased to announce the launch of the new 55-200mm F4-5.6 DC for the Four Thirds Digital SLR Camera System. Digital Photography Now has more information on this new lens from Sigma.
CD-R Lifetime
Are we putting too much faith in the CD-R? An investigation by a Dutch personal computer magazine, PC Active, has shown that some CD-Rs are unreadable in as little as two years, because the dyes in the CD's recording layer fade.
PhotoMix 5.2
PhotoMix is a new way of organizing photos into thematic collages, rather than distinct, unrelated pictures.
Photography business seminars
Speakers from all parts of the imaging industry will provide a high quality look at how the school photography business is changing when the Professional School Photographers Association (PSPA) holds its biennial UK Conference on July 14 and 15, 2004, at the Hilton Hotel, Coventry.
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