Point Reyes Farm and Fog
Often I get questions via email and I think the answer to many of them could benefit others as well, so I decided to introduce my new series From the Mailbox where I will publish a few of the questions and answers. Don't worry, I won't reveal any contact information, so your emails will be safe.
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Hello Andre, Thanks for so much information. Couple questions: 1. Equipment: For your stitching I see you use a 50 prime. Have you tried say 180mm Telephoto lens? 2. I use a mac... What Stitching SW would be good? I've tried PTGui ...seems ok bu the final file is always a smaller than what i get from CS3. 3. The instructors for Photoshop at the UC ext. courses there in Cupertino always said to use Adobe RGB color space. Now I see that people say sRGB might be better. I upload photos to the web and did A-B comparisons and they look very close to me. I've heard said that Adobe RGB web photos have dull washed out reds. Any thoughts? Maybe a tutorial on uploading photos to websites. Keep up the good work.
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Reply:
I just returned from my weekend trip, so I will try to be brief. Don't hesitate to send me some more questions if things aren't clear yet. For the Machu Picchu Image (222 Megapixel Mosaic) I have used a focal length of 200mm. It's really just about how much resolution you want to get. I don't limit myself to 50mm. It was just an example. Stiching: I use PTAssembler on PC. I think PTGui is good. The size you get is probably related to how the control points are calculated and how things are warped (I know thats a poor explanation, but check this link ) About the color space: I use ProphotoRGB for editing and sRGB for output. ALWAYS use sRGB for display and printing, but use something with more Gamut (Adobe or Prophoto) for editing. Convert using the Adobe Perceptual Engine. Most people's monitors and browsers are not calibrated and sRGB will defenitely look better. AdobeRGB contains too much gamut and will result in out of gamut colors on many peoples screens (posterization effects).
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In my hasty response I forgot to mention my article on color calibration, that might be a good source of information. LCD monitors that you buy these days at Electronic Outlet stores are not very good and are over saturated and usually have a cold tint (blue / green). They need to be calibrated in order to render color correctly. Otherwise your prints will not match your monitor output.
The tutorial sounds like a good idea too, maybe spiced up with some general color recaps.
The picture on the left is a quick B/W conversion with some curves adjustments (mainly contrast boosting) of one of the photographs I took this weekend at Point Reyes. During the summer months Point Reyes sees more fog then any other time of the year. Fortunately thats not bad news for us. While most tourists chose not to get out of their cars, I used the chance for soft light.
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