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Rangefinder
Magazine Rf Cookbook by Claude Jodoin
Putting the Expo Disc over the lens and exposing it at the working aperture (f/5.6) and time (1 second) produced a gray frame. The resultant spike in the histogram appeared exactly where it should be (for those who double-check exposure with histograms).
The curvilinear “barrel” distortion created by the fisheye was partially corrected with the Image Align program from Grasshopper software. This program can correct pincushion and barrel distortion in lenses by using sliders instead of complicated math. As you can see, a 120° correction was all that was needed to make a full frame image from the original. You can see what is happening in the image preview as you slide the controls.
The final image (below) was cropped as a 24x12-inch panoramic by using the crop tool in Photoshop and printed on an Epson 7600 with Semi Matte paper and the corresponding Atkinson Profile at 2880dpi. This image shows off the elaborate reception decorations from the exact viewpoint of the bride and groom, standing behind their chairs. It took less than three minutes to capture this image as the meter reading was taken while walking toward the bridal table. It took about five minutes to finish in the computer as outlined above. INGREDIENTS
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The
above photograph was made with a single exposure using a Sigma 8mm EX
Fisheye lens on a Canon 10D digital camera. A Minolta
Flashmeter V determined exposure in ambient light mode. The exposure
was 1 second at f/5.6. Custom white balance was achieved using the amazing
Wallace Expo Disc.
The only color correction made to this image
was the custom white balance from the “incandescent gray” frame
created by the Expo Disc. 
When it looks like you want
it to look, you then render it, and it applies changes to your image
file. The software functions as a plug-in to Photoshop or as a stand-alone
program. Quick and simple to do.