View Other Recent Articles from Bob Atkins
|
| Article Title & Description |
Updated |
Background Blur and Bokeh - an Optical Blur Calculator
"This is a small Windows program written in Visual Basic which performs an number of functions related to calculating the degree of image blur you can expect for various amounts of defocusing. Basically you can calculate the sharpness of the image outside the traditional "depth of field" limits. This is useful if you want to compare various lenses ......
|
02/27/06 |
Image Stabilzation - Does it work? Is it Worth it?
One of the most popular questions asked on web photography forums is some variation on "what should I buy" and "Is it worth it". This article addresses some aspects of the issues of which 300mm lens to buy and whether IS is worth it!
For those who don't know about IS lenses, they contain small gyro sensors and servo actuated optical elements ......
|
05/05/05 |
Optimum Aperture - Format size and diffraction
From time to time you see statements posted on web forums complaining about the performance of lenses on DSLRs when they are stopped down to f22 or smaller apertures. Such apertures are often used in macro work in order to maximize depth of field.
So why the complaints? Are these just bad lenses? Are the results of stopping down worse on DSLR......
|
05/04/05 |
Canon Speedlites: A well needed explanation
The Canon speedlite system is a source of confusion to many new (and quite a few old!) Canon EOS users. This has been made somewhat worse with the introduction of DSLRs as they are not really compatible with early "EZ" series Speedlites. DSLRs require newer "EX" Series speedlites in order to provide a reasonable degree of automation and allow autom......
|
04/08/05 |
Measuring Focal Length
Unless you're testing and calibrating lenses, I'm not sure why you'd want to know the exact focal length of a lens other than simply to satisfy your curiosity. It's just something that some people want to know. If you pay for a 400mm lens, it's nice to know you have a 400mm lens, not a 370mm lens I guess. In fact most lens makers will tell you that......
|
01/20/05 |
Digital Sensor Size: Why it matters
There's a lot of attention paid in the digital camera world to pixel count. Cameras are often categorized by the number of pixels they have in their image sensor. However not all pixels are equal and, as in many contexts, size matters!......
|
01/03/05 |
Digital Photography Help
So you just got a digital camera and now you're confused by it. Not only are there so many menus and buttons that you can't figure out what does what, but you don't even understand the words that the instruction manual uses.
Welcome to the wonderful world of digital photography!
The purpose of this short article is to collect together......
|
01/03/05 |
Free Photo Calendar
From Bob Atkins Photography: Thanks for your support of this website over the past year. As a New Year's "gift" here are a couple of free Photo calendars for download! ......
|
01/03/05 |
Picking Lenses for your Canon Digital SLR
The first question a lot of new EOS 300D Digital Rebel and EOS 20D (or EOS 10D) owners will ask is "what lenses should I buy?". If this is their first digital SLR, perhaps even their first SLR or digital camera, this is a reasonable question. Those with previous experience with the Canon EOS system will probably already have a bag of lens, or at le......
|
12/10/04 |
Canon Rebates 2004
Starting on October 15th 2004 and lasting through January 31st 2005 Canon are offering significant rebates on many of their lenses and on the EOS Digital Rebel. As they have done before this will be a "multiple discount" scheme. What this means is the more you buy, the bigger the rebate on each item becomes. It works like this:......
|
11/02/04 |
Using Manual Focus Lenses on Canon EOS Bodies
A common question is whether older manual focus lenses from other manufacturers can be used with a Canon EOS body. The answer is a qualified "yes" in many cases. Of course you don't get ......
|
10/24/04 |
Canon Rebate Rumors Are True
Looks like the rumor of rebates that I reported back in September is true. Though there's been no official announcement yet, it appears that Canon will be offering the following rebates for products purchased between October 15th 2004 and January 31st 2005. I'm sure the rebate forms will be widely available after October 15th. ......
|
10/14/04 |
Canon Rumors
In a recent interview, a Canon executive confirmed that there are no current plans for a mid-level pro DSLR ("digital EOS-3"), and that for the forseeable future they are happy with CMOS sensors and three different sensor sizes (1x, 1.3x and 1.6x). For an interpretation of a Japanese to English machine translation of the original text, see Canon's ......
|
10/05/04 |
Canon EOS-20D Rumors
"I'm hearing things from sports and advertising sources that Canon may be releasing a new Ad campaign at the end of August to coincide with the US Open tennis championship. Canon have had a relationship with Andre Agassi since around 1990 and he's been their "spokesman" for the Rebel line of cameras. There may be some new Rebel announcements made w......
|
08/12/04 |
Canon EOS-10D Replacement Rumors
Well the rumor mill is now getting pretty fired up. All sorts of claims appearing and even a few badly done PhotoShoped images of "new cameras" which are obviously bogus! Taking it all in and making my best educated guess, here's my prediction: ......
|
07/28/04 |
