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By:Chris Fastie (cfastie) on
October 15, 2009
Tags:
fofs
,
fastie
,
geology
,
usa
,
vermont
,
salisburyvt
,
300mm
,
epic100
As the Laurentide glacier retreated from the Champlain Valley 13,600 years ago, the ice damned the valley and Glacial Lake Vermont rose to about 170 m (550 feet) above sea level, which is the elevation of the camera. This sand and gravel was carried by an ice-marginal river that built kame terraces until it reached the lake where it dumped fine sediments into the standing water forming a delta more than 4 km long.
This quarry is the source of material that is spread on snow-covered roads in Salisbury. It is being sorted and stockpiled this month.
Notes: I used a Nikon D40 with Nikkor 300mm f/4.5 AI-s lens, f/8, 1/160 second, ISO 200, NEF. 35mm equiv is 450mm. Field of view set to 3 degrees.
Date Taken: October 15, 2009
Date Added: October 16, 2009
Bookmarked: 1 time
Total Views: 408 views
Gear: Nikon D40, Nikkor 300mm f/4.5 AI-s, Epic 100
Snapshots: 7
Size: 0.92 gigapixels
Field of View: 126.0 degrees wide, 16.3 degrees high
Stitcher Notes:
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October 17, 2009 14:41 | Flag as inappropriate |
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Chris, this is very nice. The information content in the image is very high. The Nikon DSLR combination with a quality Nikkor lens is producing images with much more true 'information' than the little sensor cameras can produce. Looking at this image and zooming in to the 300% on the viewer, I beleive its like looking at a 5 Gigapixel image shot by a small sensor digicam. This is quite interesting. What do you use to convert the .NEF format before stitching? I wish I could quantify what I mean by 'information' better- I mean the signal to noise ratio on your D40 source panoramas seems much higher than most digicam panoramas I view on this site. Good job! Posted by odyssey |
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October 17, 2009 15:42 | Flag as inappropriate |
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That’s a good question. Does the 6 megapixel D40 record more useful information than a 10 megapixel Canon SX10 (with a smaller sensor)? There are a lot of variables that make the answer hard to get at, not the least of which is the SX10’s 565 mm lens (equiv). The resolving power of my lesser telephoto lenses never seems to exceed the resolution of the 6 megapixel sensor (so more pixels would not increase the useful information). Which raises the question: With long lenses, does the D40 record any less information than the D90 (12 megapixels, same size sensor)? For $850, I will have at it. Lightroom produces the Jpegs. Thanks for your interest. Posted by cfastie |
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