Some General Links
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A really nice description of chromatic abberation, complete with some math and everything... :-)
Software for Freelance Photographers
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Some software for photographic freelancers:
FotoBiz looks pretty comprehensive, with a FotoQuote stock pricing module. It's written in FileMaker and is extensible. $229.
Digital Image Archive Management
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I've been trying to find some relatively easy software solutions to the problem of tracking photography submissions to various publishers. There are a bunch of options for freelance writers, but none I can find for photographers.
Cult Classic Lenses
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I doubt whether it's right to call them 'cult classics,' but this web page does a great job of telling you which third-party lenses are worth checking out.
Digital Image Editing
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A variety of topics dealing with editing digital images.
L*a*b Color Space
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I've recently been learning a lot about the L*a*b (or Lab) color space, for image manipulation.
To see why, here's a simple experiment you can do: Open up an image in Photoshop and convert it from RGB mode to Lab Color mode. Add a Curves effect layer (or just edit the curve) and tweak the a and b channels. Choke them down so that a 90% input equals a 100% output, and a 10% input equals a 0% output.
Now compare the original image to the tweak. You can't do this by simply turning up the saturation, either...
Tamron Professional Learning Center
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The Tamron Professional Learning Center isn't so professional as you might think, but it's also a whole lot of useful information.
A Simplified Zone System
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A Simplified Zone System For Making Good Exposures
Norman Koren walks you through the basics.
DIY Pentax Cable Release
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I'm a sucker for a DIY project:
Build a Pentax Cable Release F out of spare parts.
And to replace the CS-205:
Tamron Adaptall For Pentax
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A while back, I got ahold of a Tamron CF Tele-Macro 80-210mm f/3.8-4. It was my first experience with a Tamron Adaptall-2 lens.
I like the lens. The bokeh's a little harsh, but it's very sharp, built like a tank, and can focus down to just under a meter. However: It came with a plain-Jane Pentax K adaptor.