Harold_4074
23-Aug-2011, 20:35
In the image-sharing forum, a few comments have appeared regarding tricks for self-portraiture, and in particular ways of getting accurate focus. A while back I got interested in this, to the extent of assembling an electromechanical controller for a Packard shutter (I really wanted to see how a Heliar performed, and didn't have a willing subject available.)
The whole setup is shown below; the brass ball focusing target is suspended slightly in front of the stool, with the counterweight off to the right. The image corner indicators are bits of masking tape located (by trial and error) to fall just outside the image area. (The white lines were drawn into the picture along with the labels; they weren't on the backdrop.)
What is not, unfortunately, visible in the picture is the large mirror (actually, a closet door scavenged from someone's remodeling project), It allowed me to see when I was directly in front of the camera by getting the reflection of the framing marks to bracket the camera. Using four corner marks rather than a simple centerline made it easier to get a sense of the composition--it is surprisingly easy to make a self-portrait that resists cropping into traditional proportions.
In practice, I would prefocus on the ball, then sit down and line myself up in the frame. By lifting the counter weight, I could get the ball to hang freely just touching my (closed) eyelid. To make the exposure, I would drop the counterweight, which lifted the focus target out of the frame, and then trip the shutter.
The hardware performed marvelously; I wish I could say as much for the photographer or the subject:(
The whole setup is shown below; the brass ball focusing target is suspended slightly in front of the stool, with the counterweight off to the right. The image corner indicators are bits of masking tape located (by trial and error) to fall just outside the image area. (The white lines were drawn into the picture along with the labels; they weren't on the backdrop.)
What is not, unfortunately, visible in the picture is the large mirror (actually, a closet door scavenged from someone's remodeling project), It allowed me to see when I was directly in front of the camera by getting the reflection of the framing marks to bracket the camera. Using four corner marks rather than a simple centerline made it easier to get a sense of the composition--it is surprisingly easy to make a self-portrait that resists cropping into traditional proportions.
In practice, I would prefocus on the ball, then sit down and line myself up in the frame. By lifting the counter weight, I could get the ball to hang freely just touching my (closed) eyelid. To make the exposure, I would drop the counterweight, which lifted the focus target out of the frame, and then trip the shutter.
The hardware performed marvelously; I wish I could say as much for the photographer or the subject:(