Desert HDR experiments

During my hike in the desert along the Encinas trail, I took some images bracketing the nominal exposure.  The following set were done along with a set of shots through an IR filter (see my earlier blog post: IR in the Desert)  I took 5 images centered on the nominal exposure with 1 stop steps for each exposure.  The first image was the nominal exposure which I thought was a little over-exposed.

The first image was exposed with my 50mm f/1.8 lens at 1/90 seconds and f/8, ISO 400.  Exposure times for the other 4 images were 1/350, 1/180, 1/45 and 1/20 seconds.

This HDR image combine used an Ashikhmin operator in Luminance HDR on my Linux box with equation 2 and a levels adjust before saving the image.

This HDR image combine used a Reinhard '05 operator in Luminance HDR with a levels adjust before saving the image.

Desert hike photography

I took my new Canon 70D out on its first desert hike along the Encinas trail in the Saguaro National Park West on Saturday.  The trail hooks up with a wash and an old dirt road which was active in 1935 when several NGS markers were placed along its length - I used one of them as a location for a Geocache called "Surveying the Desert" that is still active as a virtual - that location was a goal since I haven't been out to that site in quite a few years, but the desert hike always presents lots of plant and sometimes animal life and this time of year is a good time to visit when the desert isn't so hot. Yesterday's blog posts IR in the Desert and Saguaro Moonrise has some more shots from later in this hike.

This multi-armed Saguaro cactus was nicely displayed against the shadowed hills in the distance.  This image was taken with my 75-300mm telephoto at 150mm focal length and an exposure of 1/250 seconds at f/6, ISO 100.  I used the Landscape scene mode while trying to figure out different parts of my new camera.

Did I mention that there are lots of Saguaro cacti and other plant life along this trail?  Not to mention lots of hills and mountains to serve as backdrops for the nearby scenery.  This area is in the northern parts of the Tucson Mountains west of Tucson.  This image was taken at 75mm focal length with an exposure of 1/350 seconds at f/11, ISO 200.

I mentioned that this desert area is a great place to see wildlife or at least the evidence of it.  Here is a deer hoof print in the sandy wash along the trail with the toe of my shoe for scale.  The exposure was 1/90 seconds at f/11 and ISO 200 with my telephoto lens at 75mm focal length.

The "bones" of a dead Saguaro are surprisingly photogenic.  Sad to see the remains of one of these magestic and long-lived desert plants but with at least a few arms, it must have lived a fairly long life, almost certainly more than 100 years.  This image was taken at 135mm focal length with an exposure of 1/500 seconds at f/8, ISO 200.

Saguaro Forest

At the visitors center of the Saguaro National Park West, you can see one of the most dense "forests" of Saguaro Cacti there is.

 With a little bit of telephoto compression it really makes it seem like there's no room for anything but Saguaro Cacti in the desert.  This image was taken with my 75-300mm lens at 150mm focal length and an exposure of 1/6000 seconds at f/5, ISO 200.

There aren't just lots of cacti in this area, but many beautiful multi-armed cacti as well like this one, taken at 75mm focal length with an exposure of 1/4000 seconds at f/5, ISO 200.