Showing posts with label Photographing. Show all posts
Showing posts with label Photographing. Show all posts

Saturday, September 08, 2007

Lessons Learned: Photographing the 2007 Great Reno Balloon Race

The Great Reno Balloon Race is an annual event that attracts over 100 pilots and their crews to Reno, Nevada each year. I enjoyed attending the Great Reno Balloon Race for the first time this year. My main regret is that I wasn't able to move around much or very quickly due to an ankle sprain, but I'm recording additional thoughts here so I'll remember what I'd like to do at the event next year.

The first thing on my wish list for next year will be to try to go to Friday and Sunday events. I attended Saturday this year and after getting up in Truckee around 2:30am and exploring the Reno/Tahoe area until sunset, I was too tired to make it before dawn again on Sunday. Who knows if I'll have Friday free next year, but anything's fair game on a wish list.

For this year's event I arrived by 4:30am and started taking pictures as the balloons that were to participate in the Glow Show were inflating, with a 30 second exposure. I set the ISO up a bit, and the shot turned out surprisingly well, with the contellation Orion appearing in the shot as a bonus.

The 5am Glow Show only had two or three brief times when all four balloons were lit at once, so you really had to be ready for it. I'd like to get a straight-on and a diagonal side angle, so I'll sprint to a new location after the first all-balloon glow. The rest of the time while they're alternating which balloon burns I'll run in and catch shots of the crew and of the propane flames.

For the Dawn Patrol flight, again there were few times when all balloons were lit at once, so plan for your location and framing for those two shots and catch them quickly while you can. I tried some time exposures hoping to get the balloons all lit over time, but the wind moves them too fast and those shots are blurry.

As the balloons were preparing for the mass ascension, I really liked my position by some modest wetlands northeast of the field towards McCarran Blvd. The rising sun cleared the horizon just as the first balloons were airborne, so it was a great angle to get the warm early morning light hitting the balloons. Next year I'll probably start closer to the balloons and get the pilots walking inside to inspect the canopies, get the flames and the inside of the balloons, and get some detail shots of the colorful balloons crowded together, then head back out to get the whole field of action. The cars parked up on McCarran Blvd. however had my same angle but gained an interesting birds-eye view looking down on the field. Some people scooted under the chain link permimeter fence... maybe it would be worthwhile to wear grubby clothes to gain access to that higher perspective for a shot or two. I guess the only other thing I'd like to get around this time would be a shot or two towards sunrise, so I'll have to weigh shooting from the West side 10 to 5 minutes before the sun rises against wanting to be on the East or Northeast side of the field a few minutes later. If it's a boring clear sky I can probably skip sunrise, or maybe I can try both on different days.

Then as the Mass Ascension got underway the wind carried balloons towards the East. The wet area I was near provided some nice reflection shots, but frankly the lighting was not ideal... the balloons were drifting past my position towards the rising sun, and although it was behind a tree the shady side of the ballons lacks color saturation. (The haze in the sky from the Plumas fire also detracted from the overall color, but I'd rather than err towards realistic color than to unrealistically correct or oversaturate.) Next year one thing I can do to react to this would be to move to the far/east side of the large pond that lies due East of the takeoff field. It was calm and would have offered more sturated colors of balloons lit in full sun, plus their reflections. I'll have to move here early in the Mass Ascension because the balloons quickly drift overhead and continue Eastward.

Next the ballons started playing various games and contests, with the key weather change being a change in drift direction westward, so the balloons come back over the field. I can stay down by the pond or continue around the field clockwise, as I see from other pictures that there was a small decorative pond or fountain to the south of the field that might offer yet another reflection site and the sun moves towards the south, following it around and shooting northward can keep the balloons well lit.

One thing I forgot to do after the Glow Show and Dawn Patrol was to set my ISO back down, so my shot from the 6:30am Mass Ascension on are slightly grainy. I did determine some time ago that for hot air balloon photos turning a polarizer to cut glare on the shiny fabric can be critical to getting a proper exposure, increasing color accuracy and saturation, and cutting haze in the sky. The benefit didn't seem as noticeable as usual in the smoke-filled sky on Saturday. I also held a graduated neutral density filter in front of my lens for the reflection shots to bring the exposures of the direct and reflected areas of the scene into balance.

I guess the last thing I'll do in the future is not head down to Virginia City for the International Camel Races, and to take it easy during the day so maybe I can return for the next day's balloon flights.

I had been thinking of heading to Albuquerque for the International Balloon Fiesta Oct 6-14, but I think I may try to return to Reno's event next year instead!

From Virginia City I headed back to Truckee via Lake Tahoe so I could catch sunset from the Sand Harbor area. I arrived back in Truckee around 8:30pm. After being on the move since 2:30am, I was ready for a break.

Thursday, August 30, 2007

Lessons Learned: Photographing the Lunar Eclipse

For the August 28 lunar eclipse I decided to go shoot by Mono Lake, where there would be no light pollution and at an elevation of about 7000 feet there would be minimal atmospheric interference. I spent the previous night in Yosemite Valley and travelled to the South Tufa access point at Mono Lake to spend the night of the eclipse. To plan for the eclipse, here are some links that I used.

Lunar Eclipse Photo Examples and Shooting Advice:
http://www.mreclipse.com/LEphoto/LEphoto.html

Aug 28 Lunar Eclipse Phases & Times:
http://sunearth.gsfc.nasa.gov/eclipse/LEmono/TLE2007Aug28/TLE2007Aug28.html

I really liked the example of a wide angle lunar eclipse sequence in a particular setting, so I set up one camera to leave with one wide perspective, and I used another to capture zoomed shots of the moon at various phases of the eclipse.

I did a fair amount of exposure bracketing, but I had some focusing problems during the darker phases of the eclipse. In my case I had added a 2X teleconverter to my lense which forced manual focus, so I assumed that I simply wasn't focusing accurately enough. Examining the shots on my computer the next day, the stars revealed that the real culprit turned out to be the rotation of the earth. My 70-200mm lens doubled via a 2X teleconverter to 400mm is equivalent to 640mm on a 35mm camera, so in the process of magnifiying the detail of the moon I was magnifying the motion of the moon as well. With the moon 10,000 times less bright during the eclipse, about a 15 stop shift darker, and the 2X teleconverter also cutting my lens's widest aperture down 2 stops from f/4 to f/8.0, I could focus on the moon sharply at any given instant, but the exposure times were simply too long as both the moon moved and my position moved (the surface of the earth rotates at over 1000 miles/hour). As I examine the shots in more detail it'll be interesting to see at what exposure time the motion becomes too great at that level of zoom.

Update: Using the "500 Rule" to determine an approximate maximum exposure before the stars and moon start to "drag", divide 500 by the effective focal length of 640 mm and you get 500/640 = 0.78.  So any exposure time under 0.8 seconds or so will produce a photo without that apparent motion blur.

A different issue I've found related to moon shots and image stabilization is that when I bracketed I wanted to use Photomatix HDR software to combine multiple exposures to really bring out the moon's detail. Unfortunately the IS system seemed to re-acquire a new lock on the moon in between shots, which moves each shot slightly and destroys the alignment of the shots relative to each other. Normally HDR software can attempt to restore alignment across multiple shots, but the information in each shot is so different that there doesn't seem to be enough information for the software to use to perform alignment automatically. I guess I'll have to use Photoshop skills to superimpose, align, and blend multiple shots.

My biggest challenge however turned out to be one that I had anticipated: battery power. What I hadn't anticipated was shooting in yosmite all day then catching a nice sunset in the Mammoth Lakes area before heading over to Mono Lake. I started the night with neither of my cameras fully charged, and having to do a little battery shuffling and charging during the night cost me a couple of key shots from the sequence I wanted to complete. Lesson learned.

The still partially eclipsed moon set over the crest of the Sierras near 13,000 foot Mt. Dana, I enjoyed a nice sunrise at Mono Lake, then I spent another day shooting Yosemite under some nice, dramatic clouds. I started getting a little tired after 36 straight hours of photography, but what a great trip!

With clouds over Yosemite and water levels low and calm on the Merced River, I had a particularly productive time there. Here are a few of my favorite shots.

The turnout opposite Bridalveil Falls is a great place to stop right before sunset as the softening golden light of the setting sun brings out the color in the valley's granite. Bridalveil Falls and the Merced River in Yosemite Valley are at extremely low levels following a winter season of low snowfall.

I wasn't sure if the reflection was going to be strong enough, but as it turned out I really like how the rocky bottom of the river shows through in the darker areas of the reflection. Some people think that all you have to do in landscape photography si show and trigger the shutter, but in this case a circular polarizer at partial strength, a graduated neutral density filter hand-held in front, auto exposure bracketing 3 shots plus HDR processing and Photoshop color adjustment were all needed to create this result

I go to Yosemite a lot, but this was my first visit with a really wide lense. Being that deep in a valley, the extra coverage sure helps, especially if you're trying to double it the Valley's landmarks with a reflection!

I call this photo "PapaBearazzi." Fortunately this bear had plenty of ripe apples to keep him full, but at night the bears roam the campgrounds, like giant dogs, looking for dropped table scraps. I've rarely seen bears wandering around during the day in Yosemite, but on this day I saw 2, and the night before my father stepped out of his tent and almost tripped over one!