After a day at Yellow River Game Ranch, Alicia asked me to help her pick the better of two photos which led to a discussion about “working” the depth of field setting can help to remove foreground distractions such as fences.  I told her I’d post a few photos to demonstrate this.

Alicia, as discussed, the following three photos were taken using a tripod set in the exact same spot, with the camera pointed in the exact same direction.  However, the point of focus is different in each so that you can see how much “working” the depth of field can affect your final photo.  These were all taken using a very narrow depth of field, ie. a wide open aperture (smaller number remember) on a telephoto lens.

This first picture is focused on the grass that is right in front of the camera (about two feet away).  You can see (blurry) the two cows in the middle and the mountains in the background.

This picture is focused on the barbed wire fence about 15 feet from the camera.  As you can see, the cows are in much better focus already, so much so that you can tell what the picture actually was.  If you look closely, you can still see the grass in front of the fence but it is already getting lost.

Finally, I focused on the cows about 50 yards away.  As you can see. even the mountains are in pretty good focus but the fence is only slightly visible and the grass is “gone.”

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So like we discussed, the closer you can get to the foreground fence you want to make disappear, the better, and the greater the distance between your subject (the cows) and your foreground (or background) distraction, the blurrier it will get.  Note in the last photo how the grass gets blurrier and blurrier as you get closer to the camera, but everything past the cows is in focus.  This is because the cows were already quite far from the camera so the difference to the mountains didn’t much matter!  Note how even the fence just 15 feet away is too blurry to make out in the first picture because the grass was so much closer – relatively speaking.

OK, so the giraffe photo I told you about…  Notice how the left side of it’s face (right side of the picture ) and it’s nose looks sort of hazy compared to the other side?  If you zoom in, you’ll see that both eyes are in perfect focus as evidenced by the eyelashes.  The “haze” is caused by a light pole that came between us (the tram was moving) just as I took the picture.  Because the light post was so much closer to me than the giraffe, even the six inch or so wide post nearly disappears!

OK, so it still ruined what would have been an awesome shot, but it does make for an interesting depth of field example.  LOL

Another project would be to take the same sort of pictures without moving the camera, focusing on the same subject for each, but changing the aperture two stops each time and going from the largest to smallest opening.  Then compare the photos like this to see the difference the various apertures make on what is otherwise the exact same subject.  How ’bout you try that one? 

So overall Im not overly impressed with my firework shots either… The fireworks were very low and I did not have a lot to work with framing wise where I could also see the fireworks since they were so low.  =(

I really think this firework was interesting and I like how it shows that I was able to get it into better focus with the tripod. I used the same settings I used the night before. (I forgot to mention that I used manual focus sorry dad.) As far as I know I am unable to increase my fstop up to f16 at the same shutter speed. I did not try at any different shutter speeds because I did not want to miss any possibly good photographs. =)

I really like how I was able to capture the burst in this photo and how it created the shape of a star. I thought it was very original!

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I was also able to capture a number of pictures where the firework was just exploding, it created a very nice effect. I definitely feel as though I could crop this picture down to focus in on that.

Lastly I thought this was a perfect exposure time for the finale! I was able to capture multiple burst and it not bee too bright like dad said he encountered.

I think Alicia may have won the challenge.

At Aunt Jan’s , the fireworks were launched pretty much right behind the palm trees.  While that worked pretty well for some shots, it was hard to frame a good burst without either cutting off the tops of the trees or having only the tops of the trees in the bottom of the frame.  On top of that, the camera had trouble with auto focus and manual focus was hard to get right.  I tried f22 to offset focus problems, but that didn’t allow enough light in.  Finally I was able to manually focus on a burst and then leave it set that way.  I had to use f4.5 with a 10 second shutter speed to get multiple bursts because there was a lot of delay between shots.  I also had to just frame the palm trees and keep the shots that burst in that frame.

The worst part is that the breeze that always blows in from the ocean was carrying all the smoke toward us so many of the bursts were behind the smoke.

Below is my best entry into the challenge.  I like it mostly because the burst looks a little bit like a larger, lighted palm tree.

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Lessons learned:
– Manually focus on the first burst and then leave it.
– f4.5 works well at 10 seconds except when they did do rapid fire.  Then you end up with way too much light.
– ALWAYS find a place to watch up wind.  In this case that will always be from a boat which would prevent long exposures because of the rocking of the boat!

This is one of Alicia’s entries from the “qualifying round” with a little bit of cropping.  I think it wins… until she posts something even better from the final round!

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Happy 3rd of July! The Prelude to the 4th was a perfect opportunity to practice taking pictures of fireworks. These are my favorite 7 of 60. I used a shutter speed of 4 or 5, and an aperture of f8. Overall I think they came out really well. One thing I did notice is that I might need to invest in a tripod.