View Full Version : Using the PB-6 Bellows Focusing Unit with the D100 D-SLR

10th May 2004, 09:18
Question How can I use the Nikon Bellows Focusing Unit PB-6 with my Nikon D100 Digital SLR?http://support.nikontech.com/rnt/rnw/img/trnsp.gif
Answer Using the D100 with the PB-6 bellows requires following special steps. To mount the camera, please conform to the following sequence:

Rotate the lens bayonet on the PB-6 to the vertical position. Do this before attempting to mount the camera. If the PB-6 lens mount is in the horizontal position, the bellow's rail system interferes with the positioning of the D100 on the mount.
With the bellows mount in the vertical position, mount the D100 in the normal manner. Later, if you wish to position the camera to horizontal, it is possible. Release the bellow's lock mechanism, and rotate the camera to the horizontal position.
To remove the D100 body from the bellows, first rotate the D100 camera body to the vertical position, then press the D100 body's lens release button and dismount the camera.
After connecting the D100 to the PB-6 there are a few issues to remember when using the two:

This information applies exclusively to the PB-6 bellows and PB-6E bellows extension. The older, PB-5 bellows cannot be used with the D100.
The D100 can only be used in manual control mode, you must set the shutter speed and aperture accordingly. For full exposure control the preferred lens will be a Nikkor lens with an aperture ring. The G-type lens does not provide aperture control for this application.
All Nikkor lenses are optimized for focus throughout the range indicated on each lens. Using a lens for reproduction at a closer focus (higher reproduction ratio) then designed may produce lesser quality images.
As the bellows is extended, the lens moves farther from the film plane, and the relationship between the distance to the subject and the distance from the film plane becomes reversed from the relationship for the lens' original design, that is closer to the film plane and farther from the subject.

Therefore, for somewhat improved performance, when using a large bellows extension, results can often be improved by reversing the lens, so that the front of the lens mount is positioned on the bellows and the rear element now faces the subject.
Most bellows photography will be done with the lens at the smallest aperture, thus providing relatively more depth-of-field; the DOF is still very shallow at high magnification.
Speedlights are a must. Multiple speedlights add dimension to the lighting and are highly recommended.
A cable release and very steady tripod is a must.

หนก บางหลวง
10th May 2004, 09:35
อิจฉา นิกร แฮะ มีของเล่นในยุคเดิมๆให้ใช้เพียบเลย

13th May 2004, 02:26

อยากได้กล้องที่เวลาใช้ bellows แล้วต้องใช้ PB-6E จัง

มาบ่นเฉยๆ แหะๆ :p :p :p

20th May 2004, 05:35
ขอบคุณครับ :D