Mitch Seavey crosses the finish line in Nome, Alaska, at 11:30PM, March 28, 2008, setting a new record time for the All Alaska Sweepstakes. Jeff King came in second, at 11:40PM. Lance Mackey took third arriving at 1:59AM on the 29th.

Mitch Seavey crosses the finish line in Nome, Alaska, at 11:30PM, March 28, 2008, setting a new record time for the All Alaska Sweepstakes. Jeff King came in second, at 11:40PM. Lance Mackey took third arriving at 1:59AM on the 29th.
Posted by
Patrick
at
12:38 AM
0
comments
Labels: Dog Mushing
Posted by
Patrick
at
9:48 PM
0
comments
Labels: Dog Mushing
Posted by
Patrick
at
10:21 AM
0
comments
Labels: Dog Mushing
Posted by
Patrick
at
1:57 PM
0
comments
Labels: Dog Mushing
"These are interference fringes due to the parallel faces of the filter and to the narrow spectral emission at 5577 Angstroms in the aurora. That green, atomic oxygen emission line is the strongest emission in the aurora near our film and eye peak sensitivity, so it shows up first when there is any device in the optical path which sorts out the spectral emissions."Harry Manos, a physics teacher from California who gave a lecture on aurora photography (and consulted Charles Deehr for material review) describes it this way:
"A haze filter in front of the lens acts as a Fabry-Perot interferometer on the 1S auroral green emission line of oxygen, creating green concentric circles"So what does that mean exactly? This is a good interpretation: just take your filter off!
Posted by
Patrick
at
1:54 PM
0
comments
Labels: Aurora borealis, Technique
Posted by
Patrick
at
3:16 PM
0
comments
Posted by
Patrick
at
2:17 PM
1 comments
Labels: Birds
In switching from the 1Ds Mark II to the Mark III, one should really read the camera manual. Now how many people actually do this? I glanced at it, but must admit that I feigned an entire read. Until, I ran into a few odd discoveries, which prompted further exploration. Most notably, was the reduced frame rate, about 2 frames a second even in the fast mode. It turns out that having the High ISO digital noise reduction turned on slows down the frame rate due to software processing for noise. With the Mark II, I left it on all the time and it did not seem to make a difference. Make sure to turn it off for maximum speed.
Additionally, with custom functions buried in 4 different categories, it is hard to remember what is where. A helpful feature of the Mark III lets you tag your most often used custom functions and register them to show up under the "My Menu settings". This can provide a much quicker access to custom functions that you change often, like LCD Brightness, Mirror lockup, etc.
Posted by
Patrick
at
2:30 PM
0
comments
Labels: Camera and Lenses
Posted by
Patrick
at
9:56 AM
0
comments
Labels: Dog Mushing, Travels
Posted by
Patrick
at
4:29 PM
0
comments
Labels: Travels