I watched eBay auctions for Nikon D3100 cameras for a day, then started watching auctions for D5100 cameras. I assumed that the upgrade from the Nikon D40’s six megapixels had to be at least to 14 megapixels to make a noticeable improvement in copies of old Plus-X film, and I assumed that to really record the film grain, the D5100’s 16 megapixels would be required. But the D5100 was $100 more, and the raw files it makes are 20 MB, compared to 15 MB for the D3100 (and 5 MB for my old D40). The D5100 is also bigger and a bit heavier. After several D3100 auctions completed, I ordered a refurbished one from Adorama for $350, about the price used ones were going for on eBay with a kit 18-55 mm VR lens. This gave me a 90 day warranty and it was easy to order a couple of spare batteries. It arrived in 1.5 days for $6 shipping, way better than most eBay deals. Continue reading “Copy that”
Click photos to enlarge.
Digging around for 40 year old negatives last week turned up a couple of even older things. I found a little T-shirt, and a couple of copies of the Sunday rotogravure section from The Baltimore Sun for August 21, 1960, 53 years ago today. The brown section had been archived because it included photos of my entire family in a two page spread about Soldiers Delight. We were honored to be pictured in this article because the photographer was A. Aubrey Bodine who had worked for the Baltimore Sun since 1920. We were chosen to be the models for this photo shoot because my parents were advocates for the preservation of the undeveloped tract of serpentine barrens near our home in Owings Mills, Maryland. Also because we were really cute. Continue reading “Convergent artifacts”
Click images to enlarge.
In the 1970s I exposed about 400 rolls of black and white film. Most of these were 36 exposure rolls of 35 mm Kodak Plus-X which I bulk loaded and developed at home. I made an 8 x 10 inch contact print of each roll, and put an accession number on the contact sheet and the glassine envelope with the negative strips. I still have all 14,000 of these negatives and contact prints. If you think that preserving this collection suggests that I am farsighted, consider that I never put a single date on any of this material. Continue reading “Negative space”
This Google Earth embed did not work well with all browsers so I was testing it here. You can learn more about this project here.
The Lytro camera is probably the most interesting advance in photographic technology this year. An array of microlenses allows the sensor to capture information about the exact direction from which light is coming, and that allows software to focus every part of the scene regardless of it’s distance from the camera. To highlight this advance, the company’s first camera produced interactive online images which could be refocused by clicking anywhere in the scene (see some here). We have all looked at photos with out-of-focus parts, and it is a novel experience to be able to click on or touch the fuzzy places and have the crisp focus shift as if a focusing ring was being turned. But it has also been maddening to know that the captured data would allow the entire photo to be in focus all at the same time, yet this was not an option for any Lytro photo. It was a clever marketing approach, because modern digital cameras with tiny sensors have very good depth of field, and many of the photos we take now already have everything in focus. Allowing the viewer to “focus the photo after it was taken” highlighted how new this technology was. Continue reading “Lytro Schmytro”
In the late nineteenth century, hand drawn “bird’s-eye maps” were a revelation to earthly New Englanders. When exotic hot air balloons were the only way to gain such a perspective, enterprising artists just imagined what a bird might see. The customers for these maps lived and worked in the buildings depicted, so these are probably placed with some accuracy, relying on existing maps for data. It is the details of the rest of the landscape that were recorded nowhere else. In the 1889 drawing below, cleared fields, orchards, and shrubby growth nearly to the top of Hogback Mountain confirm the wisdom that in 1850 the entire slope, like others all over Vermont, was probably cleared of trees. Today, the young ages of the trees tell the same story, but an old bird’s-eye view is still a revelation. Continue reading “Kite’s eye view”
My town’s cemetery committee would like to have maps of the grave stones in the three town cemeteries. The late Fletcher Brush cataloged the headstones in each cemetery in the 1990s, and probably made hand drawn maps, but it would be nice to have more official versions. I was asked on Thanksgiving about helping with this mapping, and the next day was beautiful AND had a nice south wind. Flying a kite over the cemetery in the village requires a south wind, and the row of overhanging locust trees along the edge makes late autumn the best season to image all the headstones from above. So I couldn’t resist exploiting what might be one of the last good opportunities to image this site for a long while. Continue reading “Grave images”
The winds have been light this week as the peak colors have been waning and my KAP pack has been poised by the door. I finally had to ignore the “4 mph” reports at WeatherUnderground and WeatherSpark and just go. I went to the hay field south of the Salisbury village where the south wind might push the kite toward the village center. There were some gusty spells that lifted the KAP rig just high enough so that I had to frantically reel it in when calm returned. Attaching and detaching the Picavet in a hurry requires more practice than I have had, and I surpassed my own record for making nasty tangles that included Picavet line, kite line, and alfalfa. At one point I didn’t have time to take off the Picavet as I wildly pulled the line in hand-over-hand, laying it across the field. After untangling (not my favorite thing), I called it a day, disassembled the Fled, and headed back across the field to the pack. When I got there the wind had picked up, so I assembled the Fled, threw it into the air, and had the rig attached when I noticed that I had left the RC transmitter out in the field — out in the huge field of alfalfa and grass that is at places a foot taller than the transmitter (the thing around my neck in the photo above). Continue reading “Practice”
Last month I went to the Middlebury Farmers’ Market at Marble Works for the first time ever. My garden had been suffering some scurrilous blight and I was about to feed 10 people for the LEAFFEST weekend. I looked along the row of vendors to the steeple of the Congregational Church beyond some trees and realized there might be enough space to launch a kite there. A west wind would take the kite the length of the lawn and then over toward the church on the “Green,” the village commons. This could offer a unique view of the village center. But the wind almost never blows from the west here due to the north-south trend of the Champlain Valley. Other wind directions would make the flight less rewarding and the launch and landing more risky, and I had never flown a kite from such a small area surrounded by so many power lines, buildings, trees, river banks, and busy roads, so I assumed I would never fly there. Continue reading “Over Middlebury”
I think it is time to upgrade the technology I have used for 14 years to monitor the temperature of my compost pile.
The graph below is live, as long as I keep going out and reading the temperature and coming back in and updating the Google spreadsheet. In 1998 I inherited the old YSI thermometer device and found a 7.5 volt mercury battery for it. The battery is still good, and I even have a spare (also 14 years old). I hope that the participants at LEAFFEST can help me find a replacement technology for the beast.
The featured pile was built on September 10 from a three month accumulation of kitchen, garden, and yard waste, some old hay mulch, freshly cut alfalfa, 100 chopped corn plants, a quart of organic fertilizer (5-3-4), and 20 gallons of spent tomatoes, cucumbers, peppers and cabbage. The pile was turned on October 7.
Twice this year I walked around for more than an hour flying a kite-lofted camera that I thought was taking photos, when in fact it was just fooling me into getting exercise. On the first occasion the shutter controller battery died, and the other time the camera just got confused and stopped shooting. I think I sent radio commands to shoot too frequently and it decided to take a nap. This happened another time as well but I happened to reel everything down after only 20 minutes of not taking photos while I was jogging here and there. I have modified the controller so the battery lasts much longer, and I have learned to be patient when sending radio commands, but I am certain that the rather fragile KAP rig electronics will surprise me again with their unexpected inactivity. So I have been looking for a way to monitor the camera operation from the ground. I have been brainstorming with some friends about how to do this, and Don Blair, a physics graduate student at UMass has been prototyping an alert system based on a $20 pair of walkie-talkies. I couldn’t stand hearing about all the fun he was having in Amherst using MOSFETs to remotely push the walkie-talkie PTT button, so I decided to build my own solution. Continue reading “Downlink”
It has been 14 years since we set up our first study plots south of the Alaska Range. I just returned to Fairbanks from a week-long trip to re-census the plots located above the upper forest limit at the Canyon Creek and Monahan Flats sites. There were a few scattered spruce trees and a total of a few dozen spruce seedlings marked with numbered tags in the quarter-hectare plots in 1998. The trees have not changed much, and only 8 to 10% of the seedlings have died. The surprise was the number of new spruce seedlings that have established in 14 years. Seedling density increased by a factor of 2.9x at Canyon Creek and 2.2x at Monahan Flats. The similarity between the two sites suggests that the seedling invasion may be widespread. These seedlings have a lot to endure before they become trees, but if similar numbers of seedlings continue to establish and many of them become trees, these plots will no longer be above treeline in 50 years.
I was able to get some aerial photos of most of the plots after I had marked each seedling with pink flagging. I flew a dual camera KAP rig with normal and infrared-modified cameras lofted by a kite. I will be experimenting with false color IR (NRG) and NDVI images which can be created with information from both cameras. Continue reading “Sprucing up the hills”