Category Archives: Techniques

HDR Techniques

Light Study (II) – Flashes and Macro shooting

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My personal study of light continues and this is the third post, which I am writing after another several hours of playing with light. My first post on this is “Patterns and Light Study” and second is “Light Study (I) Working with flashes”.

This time I was inspired by some abstract photographs I saw on the net, and wanted to try and do something abstract (or almost abstract 🙂 ) myself. For this shoot I used Canon 100mm F2.8 Macro lens, and two flashes with gels on them. The colors that you see on the final photographs were not edited in photoshop. I achieved them only by lighting, and of course this Canon macro lens is great!

As I said I wanted to achieve abstract photographs with certain aesthetic value main goal being my personal study of light techniques. First of all I needed a texture, so I walked around my apartment and searched for something suitable. Eventually I found a big blue plate with interesting ornament. Then I filled it with water (since the plate wasn’t deep, I had to be careful not to spill). Finally I had to decide on lighting. Because the plate was blue, I decided to choose a matching blue gel on my main flash to the right of the stage. I also wanted to have more than one color in the frame so I added another flash with pink-red gel to the left and a little behind the stage. I set the second flash to lower power than my main flash. Both flashes were with gobos (if you don’t know what gobo is, read my previous post).

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The first photograph (from the left) is simple this plate with water (which is not seen). You can see that the strong foreground blue color slightly changes to purple towards the back due to the second flash coloring. And also because I was using a macro lens from close distance, the depth of focus is pretty low.

Then I thought of making some splashes in the plate and see what happens. Everybody saw at least some photos with water drops and ripples, so I thought that I can also try some of that, and my second photo shows one of the many interesting pictures I got.

When I had enough of playing with splashes, I added a sunflower petal to the picture and dropped a small water drop on it. Now I had to change my secondary lighting because the petal was yellow, and red light didn’t do it any justice. After experimenting I finally decided to put very light green gel on my secondary flash, and it resulted in emphasizing the yellow color of the petal with light and gentle shades of green. Third and fourth photos were taken with this setup (left flash on low power with light-green gel and right flash with blue gel).

And finally the fifth photo was taken using only the left flash with light-green gel on it. I worked on this photograph for quite some time to achieve the deep interesting shadows.

As always any comments and your own experiences are welcome!

Light Study (I) – Working with Flashes

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Finally two additional flash units that I ordered on e-bay arrived and I could experiment with more than a single light source. Now I have one Canon flash (430 EX, bought second hand) and two Yongnuo flashes. Yongnuo (full name is Shenzhen Yong Nuo) is a Chinese company, which makes photographic equipment. They sell many products, which can be cheap replacements for the branded expensive Canon or Nikon stuff. For example these two new Yongnuo flash units cost me less than one Canon 430EX second hand! Anyway I’ll talk about the equipment in another post.

Basically what I was doing in this photo-session is placing light sources differently, shooting the picture, and looking at the result. My aim was to be able to predict how the image would look like so in the future I will be able to first visualize in my mind certain composition and then consciously achieve it using my light sources.

At first I couldn’t get any result that would satisfy me, my light was too scattered around and uncontrollable. Then I understood that I need more directional light, so I created gobos. This is something I learned from Strobist. You know that website right? If you don’t and interested in light, you definitely should visit it.

Anyway gobo is a simple cardboard rectangle box that you can do yourself. You then place it on your flash so it directs the light from it in one direction. And this helped a lot in achieving more predictable and neat results.

In addition I used colored gels on my flashes. Gels are transparent colored plastic stripes that you put on the flash to make its color different from daylight. By the way, there is one trick I learned myself in the process: if you use these gels, and work with auto white balance, your camera may try to adjust its white balance incorrectly since there is too much colored light in the scene. My solution was to put the white balance to “daylight” and that solved it.

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And now to the results I received, and what I did to receive them:

In the first photo (from the left) I used two flashes. Both flashes were with gobos. The flash on the right side was without gel, and I pointed it more to the “base” of the light bulb. The flash on the left side was equipped with red gel and gobo, and was pointed a little above the lamp. This way I got less specular highlights on the light bulb. Both flashes were on manual control and placed approximately at the same distance from the subject, but the power of the left flash was weaker. This way I tried to achieve the feeling that the light bulb is glowing with red light.

In the second photo the setup was essentially identical to the previous one. I just added blue gel to the right flash. While this added interesting color to the photo I tend to like the first photo better because in my opinion it better achieves my goal – getting the light bulb to glow with red color.

Next two photos are of a champagne glass lighted with the same two flashes (still having gobos on them) left flash with red gel and right flash with blue gel. The difference now is that I put the left flash on minimum power so there would be much more blue and only a touch of red. Of course I achieved the result you see in the photos by trial and error.

One more thing to notice is that the background is almost completely black. This is not because I had a black backdrop. Actually my background was plain white wall, but all my light was directional (thanks to gobos) and none of it got spilled on the background. And since I worked with exposure settings that were too “low” for the ambient light in the room, as a result the background was heavily underexposed. If I wanted to have a background, I could use my third flash to light it.

That’s it for today’s photo-session. If you have any questions or comments, please feel free to leave comments here or drop me an email and I will be happy to get back to you. And, of course, your own experiences will be highly appreciated!
Just one more thing – don’t forget to visit the Strobist web site – I learned a lot there and sure that you would too!

How to create HDR image in Photoshop

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Recently I have seen many HDR images that were too exaggerated, making them completely unrealistic and in some cases even unpleasant to watch. Programs such as Photomatix make it very easy to create HDR images but they are also tend to lead people to create very exaggerated HDR images, maybe because it is very easy to accomplish in these programs.

I have nothing against using HDR techniques in creating artistic imagery, but I would like to remind you that the original intention of the HDR was just to increase the dynamic range of the photograph.

However with a little knowledge of Photoshop, you can do that – you can create an HDR image that will look very realistic but still show all the detail that you want it to show.

I created a pretty simple tutorial that shows how to manually create HDR image in Photoshop. In this tutorial I used two photos taken at the same location (using tripod), one exposed for the bright sky and the other one exposed for the darker lower part. Though I used only two photos, you can use as many photos as you like revealing detail in any part of the scene according to your preferences.

There is one point of this tutorial that I would like to stress out one more time – use large brush with soft edges and opacity around 50 to 60 percent. It is important so that your final image won’t have these “white glow” edges that can be seen in so many HDR images.

If you are new to the whole HDR thing, you can read my previous posts on the subject: HDR – Introduction and What is Pseudo HDR image?

If this tutorial helped you to create your own HDR images I would sure like to see them! But if you don’t have Photoshop, but still want to create HDR images, you might want to try Photomatix.