greg_downing

I have an even worse case of what I think is the same artifact. I shot it from the peak of Corona Heights in San Francisco. There is not a cell tower or other visiible radio transmiter on the hill. The example I have uploaded is downsampled, not a crop.

Everything I shot from that location w/ my 5D and the 400mm "L" at iso 160 and f/6.7, I took a shot moments before from the same location w/ a 20mm lens and it did not have this artifact. Everything I have shot w/ the 5D and the 400 same iso and apeture earlier in the day and the next day did not exhibit this artifact. I also did search corona heights on flickr, not one of the photos exhibit the artifact. It is still a mystery.<div></div>

Hi Guys,

If you would like see the full image of about the same resolution on the web you can take a look at a project that I just completed http://www.xrez.com/ Now I know that this is not a large format film project precisely and you are all large format film guys but if you are interested in seeing more detail in an image you will probably enjoy this. Our hero shot was taken from the diving board in Yosemite, very near the spot that Ansel Adams shot "Monolith, Face of Half Dome" we timed the shot so it was half in shadow as it was when Ansel shot it but we also captured the rest of the valley. The final resolution of the image is 3.8 gigapixels and I split the image into 100,000 256x256 jpgs and delivered it via a google maps hack. This might be a method to show large format photographs on the web as well. I hope you like it!

-Greg Downing

http://www.xrez.com/