Photo Extremist: Creative Photography Tutorials, Photoshop Tutorials, Instructional Videos

15Mar/1112

How To Take Psychedelic Photos of CDs

In this light painting tutorial I am going to show you how you can take long exposure photographs of water drops on a psychedelic colorful reflective CD surface with a Mini Maglite flashlight.

Equipment

I'm using a water dropper, a M2A016 Mini Maglite Flashlight, a regular CD, a Nikon D300s DSLR, a Manfrotto 055XPROB Tripod, and some color gels. I also used an ND8 Filter so I could use an aperture of F11. The gels and ND8 filter are optional.

Camera Settings

I was using these settings:
Shutter Speed: 5-60 seconds
Aperture: f11
ISO: 100 (or "Low 1.0")
White Balance: "Incandescent" for correct color, or "Auto" for warmer colors

Instructions

Take the water dropper and place a bunch of droplets on the CD after you have put it on a table of your choice. The table I was using was a laundry basket with a thin black blanket over the top. Fancy!

Next, put your DSLR on a tripod and place it right up next to the CD. I was using manual mode with manual focus most of the time (but not always, a lot of DSLR cameras have an AF Assist Lamp in the front of the camera that helps focus in the dark, in situations just like this!)

In order to get my aperture to f11, I was using a simple ND8 filter in front of my lens. This isn't necessary, I just wanted my photos really sharp, and f11 is the sharpest spot on my lens. You can go down to f22 or smaller and skip using the filter if you want. Just use the highest f number you can and the lowest ISO number possible. This will limit the amount of light being exposed to the camera sensor, which is what you want in this situation. Maglites are bright!

Tips

Try making different patterns around the CD with the Maglite flashlight. A really cool one to do is to place the light level with the CD next to the table. This creates a perfect circular reflection in the circular water drops on the circular CD! Really cool.

Try pointing the light diagonally down on the CD, and just try different directions and distances away from the CD. You are bound to get a cool shot.

In order to help me be sure that I get the psychedelic rainbow colors on the reflective CD surface, I Temporarily widened the aperture on my lens to f3.5 and then went into Live-View Mode. This makes it easy to see exactly what the camera sees, so you know what direction to aim the light to get colorful rainbow effect. After you see the rainbow effect appear on the CD in your viewfinder or in Live-View mode, get out of live view mode, go back to smaller aperture you were using before, and then take yo' picture.

Video

Tagged as: artistic, cd, color, colorful, creative, flickr, instructional, light painting, long exposure, maglite, photo, photography, rainbow, reflective surface, tutorial, video, water, water drops 12 Comments

2Mar/117

Photoelasticity Birefringence Photography Tutorial

Photoelasticity Birefringence is a visual phenomenon that occurs when placing transparent plastic between polarizing material. The effect shows the stress contained in the plastic.

In order to take pictures like this, you will need to place a hard transparent plastic object between two polarizers. Make sure your object is backlit as well. Fortunately, LCD computer monitors are backlit AND have a linear polarizing material in front of the backlight, so this takes care of everything. If you go this route, all you need to do is find some cool looking plastic and stick a polarizer filter on your lens and you are set to go. If you don't want to use a laptop computer screen or just want to to get rid of the ugly RGB pixels, use a light table with polarizing paper on top of it instead.

You'll also want a polarizing filter to place on your lens. This can be circular or linear, it doesn't matter. Things that work well are cheap transparent plastic cups, forks, spoons, and knifes. Prisms, plastic wrap, and cheap packaging material work good as well. Things that unfortunately don't work are water, glass, and anything that isn't a transparent plastic (crystals might be the only exception, although this is unconfirmed). Water can sometimes look okay-looking, but not nearly as cool as plastic.

Additional Resources:
http://en.wikipedia.org/wiki/Photoelasticity
http://en.wikipedia.org/wiki/Birefringence

Tagged as: Birefringence, clear, colorful, filter, how to, Photoelasticity, photography, Polarizer, polarizing, psychedelic, rainbow, stressed plastic, transparent, tutorial 7 Comments

16Dec/104

Bokeh Photography Tutorial

In order to capture great bokeh shots you will need to set the aperture of your lens to as shallow as it can go. Use a 50mm f1.8, a 70-200mm f2.8, or if you don't have those, you can still probably use the 18-55mm kit lens that came with your camera (just make sure to zoom in all the way and set the aperture to as low as it can go, f5.6 in most cases).

Because we are working in low light situations, it is a very good idea to have the camera on a tripod to rid camera shake. You can light your subject up with a lamp. In the video I used regular incandescent / tungsten light bulbs in the background and lit my subject up with a near-incandescent modeling lamp as well. If you are a strobist you can use an external flash to light your subject, just make sure to put some sort of tan colored gel over your flash unit to make sure the lighting in the background and on the subject match color temperature.