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November 09, 2008

The Lensaholic (New Reviews, diffraction, focus-shift, a book, and more)

Welcome to a new edition of the Lensaholic! For more lens coverage, be sure to check the Lenses mini-blog.

Lens Reviews
PhotoZone has just posted their review of one of the top Pentax lenses, the DA* 16-50mm f2.8 ED SDM. As with all lenses it's a series of trade-offs, namely pros vs cons vs price. So what did they find? If you are in a hurry, the verdict is on page #3.

And now let's start zooming! TWIP has a mini-review of the Sigma 300-800mm f5.6 lens. They also provide an unboxing video so you can get a better read on the size of the lens. What did they find? No spoilers here!

If you want to reach for the stars, perhaps the best alternative to a telescope is the Canon 800mm f5.6L IS USM ;-) Needless to say this is a five-figure lens! So what did find out?

Lenses and Friends
Who says books about lenses can't get an award? Shutterbug has selected the book "Quick Snap Guide to Using Digital SLR Lenses" as one of the top digital imaging books of 2008. Look for the award in the December 2008 edition.

TOP talks diffraction, and mathematical formulas are included. And if you want to learn even more, they provide a suggested further reading.

What is focus shift? offers a brief introduction. This is a free article for everyone. A lot of the premium content at is pay-per-view, but this article is for free.

The Roberts Imaging blog says filters aren't dead!. Are they? Are they not? They blog, you decide!

And in case you missed it, there was a new lens this week, version 2.0 of the Olympus 14-54mm f2.8-3.5, which is a mid-range Four Thirds lens which will sell for around $600 in January.

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