Tag: juvenile

Posted on

Right Tool For The Job – Full Frame Vs Cropped Sensor

Recently I was asked by a prospective digital camera buyer about my opinion on full frame verses cropped sensors. The answer is actually not very simple, so I thought I’d expand on my thoughts in this post.

For those who aren’t familiar with these terms, full frame refers to a digital camera that has the same sensor size as 35mm film. This became the prevailing film standard, and most of today’s digital SLR lenses use this size to calculate their relative lens magnification factor. A cropped sensor camera is a digital SLR that has a sensor smaller than 35mm film. These cameras use the same lens focal length scale, but apply an additional “magnification factor” to the 35mm numbers. For example, Canon’s cropped sensors apply a 1.6X magnification factor to lenses as compared to 35mm-sized sensors. If a full frame camera used a 50mm lens, the perceived magnification factor using the same lens of a cropped sensor camera is 50mm X 1.6 = 80mm. In other words, in the resulting photos, it appears as if the camera was zoomed into 80mm when using a 50mm lens on a cropped sensor camera.

So which is better? As with any tool, it depends on the job. I use both full frame and cropped sensor cameras regularly in my photography. When I’m shooting landscape, architecture, or macro, I typically use a full frame camera. My current workhorse is the Canon 5D MkII (now practically a dinosaur of a camera!), which allows me to use a full range of lens focal lengths, including my widest. In these shooting conditions, camera features such as auto focus and frame rate are not as important to me as pixel count and low digital noise. With this camera, I shoot from a tripod most of the time and work slowly and methodically through the scene, getting as much right in camera as possible.

Barrel cactus is just starting to bloom in the Alabama Hills, Lone Pine, CA
Barrel cactus is just starting to bloom in the Alabama Hills, Lone Pine, CA

The photo above is an example of using a full frame camera with a wide angle lens. Here my 17mm lens truly gave me the wide angle using my full frame sensor, instead of the appearance of a 27 mm lens (17 X 1.6) if I used a cropped sensor. I worked from a tripod, manually focused, and shot at ISO 100.

When I’m shooting bird and wildlife photos, I always use a cropped sensor. This gives my long lenses that extra reach, and cropped sensor cameras tend to have slightly lower pixel count, which allows for faster frame rate. My cropped sensor workhorse is the Canon 7D, which has my most important traits for these shooting conditions – fast auto focus and high frame rate. While low noise is always desired, here the highest pixel count is not as important, as wildlife and bird photos typically don’t end up in huge prints. Pairing this camera with a 400 mm lens allows me to handhold while photographing giving me lots of mobility. When I use it with my 800 mm lens, I get the equivalent of 1280mm due to the lens multiplication factor. This gets me in close to my subjects without needing tele-extenders, which reduce auto focus performance.

Crouching down and ready to strike, a juvenile green heron watches the surface of the water for movement
Crouching down and ready to strike, a juvenile green heron watches the surface of the water for movement

The photo above is an example of using a cropped sensor camera with a long lens. Using the equivalent of 1280 mm (800 X 1.6) allowed me to be far enough from my subject to not disturb it from its normal behavior. I was also able to shoot many frames per second to capture the perfect body and head position while the green heron was fishing.

Just as a carpenter wouldn’t just use one type of hammer, a photographer won’t resort to just one type of camera. If you are just dipping your toes into the world of digital SLRs, think first about what type of photography you’d like to explore first. That will likely help you list your desired features and point you to the right tool for the job.

Posted on

Pelican Palooza

Several american white pelicans swim together, alternately dipping their heads under water to pull up a bill full of fish
Several american white pelicans swim together, alternately dipping their heads under water to pull up a bill full of fish

I stopped at one of my local spots to photograph birds and was rewarded with an abundance of not only one pelican species, but both species that are regularly seen in California – the American White Pelican and the Brown Pelican. Usually I don’t see both in one area, but here they were at Shoreline Park in Mountain View, each doing their own thing.

First, I saw a half dozen white pelicans swimming together, and fishing simply by dunking their heads underwater and scooping up great billfuls of water. In this way, they were able to catch small fish, but on a fairly regular basis.

A fish attempt to flee the confines of an american white pelican's bill.
A fish attempt to flee the confines of an american white pelican’s bill.

Most of the time, at least one pelican would remain above water while the rest would go for fish. They would rotate this way, dunking, scooping and eating. At some points however, I saw all pelicans in the group go under at the same time. I waited to see if I could get them lined up, and finally I saw a moment of symmetry in order to capture this photo.

Four american white pelicans line up, all of them fishing at the same time. There was a nice symmetry to this image, which was calling very strongly to be rendered as a black and white fine art photograph.
Four american white pelicans line up, all of them fishing at the same time. There was a nice symmetry to this image, which was calling very strongly to be rendered as a black and white fine art photograph.

Next it was on to the brown pelicans, who were circling above Shoreline Lake, and going through much more effort to fish. A pelican would circle for a while, keeping a close view of the surface of the water.

A brown pelican circles through the air above a lake, looking for fish to dive for
A brown pelican circles through the air above a lake, looking for fish to dive for

When it saw a movement of fish in the lake below, it would stop its forward flight and sort of hover in air.

A brown pelican circles through the air above a lake, looking for fish to dive for
A brown pelican circles through the air above a lake, looking for fish to dive for

At this point, it would plummet to the water surface in a dive, completely submerging its entire body underwater. The success rate of fishing this way seemed lower than the white pelicans, but perhaps when the diving did work, it rewarded them with bigger fish. It was fine by me, because their activity rewarded me with many flight shots and photographs of the birds on the surface of the water.

A brown pelican flies low and flat over the surface of the water after it takes off from the surface
A brown pelican flies low and flat over the surface of the water after it takes off from the surface

After a dive, the pelican would drain its bill of water, and swallowing any fish it caught. Occasionally, I was rewarded with a vigorous head throw.

After diving for fish, a brow pelican dries its feathers with a vigorous head throw.
After diving for fish, a brow pelican dries its feathers with a vigorous head throw.

After a couple of hours of shooting, I was pretty pelican’ed out and I packed up to leave. But it was great to see both species side by side on a single morning.

Posted on

Black-necked Stilt Chicks

For my New Year’s post this year, I added an image of a black-necked stilt chick and its mother. I have finally processed additional photos from that day of the same chick and its siblings (there were three altogether).

A black-necked stilt chick wades through shallow water looking for food
A black-necked stilt chick wades through shallow water looking for food

I found this family at a popular birding spot near my home. While I had heard reports that nesting activity had occurred here in the past, I had never seen stilt chicks here myself. It was a joy to watch these little guys stumble around on shaky legs until they got tired, and had to take a break by sitting down on the shoreline.

A black-necked stilt chick takes a rest on the shoreline next to a still pond
A black-necked stilt chick takes a rest on the shoreline next to a still pond

Soon enough, they would recover and bounce back into action. One of the three was more adventurous than then others, venturing away from the shelter of the brush in search of food.

A black-necked stilt chick is reflected in still water as it looks for food along a narrow island
A black-necked stilt chick is reflected in still water as it looks for food along a narrow island

It was fun to watch them interact with each other. I could imagine talking to each other in their own little language, telling each other where the best food could be found.

Two black-necked stilt siblings stand close together in shallow water
Two black-necked stilt siblings stand close together in shallow water

When one chick would wander off too far, the mother would swoop in and corral it back to the others. Hopefully this family had good luck and all of these chicks made it through the nesting season. I look forward to scoping out this spot in the future for more nesting activity and a close up view of parents bringing these little ones into the world.

Posted on

Dreaming of spring

A mallard duckling swims close to its mother, who keeps a close eye on her chick
A mallard duckling swims close to its mother, who keeps a close eye on her chick

As I sit here in the pre-dawn morning, I can’t help but think of longer (and warmer) days. Although winter is a fantastic time for birds (at least around the SF Bay Area), I get tired of gearing up for the cold every time I want to go out for photos. This is the time of year that demands real dedication. The time of year that only sees the most dedicated of their fields up and outside in the cold darkness.

Soon enough however, buds will be forming, light will stay later, and little ones like this hatchling will start gracing us with their presence.

Copyright 2017 Hank Christensen