Instruction manual

Instruction Manual Roundshot D3 - version 4.05 – May 2013 - © by Seitz Phototechnik AG / Switzerland www.roundshot.ch page 55

Step 3: Complete a series of test images with TDI Stages = 1x, each time increasing

the effective focal length in the software. The Seitz Roundshot D3 software will

automatically adjust the image length (amount of pixels horizontally).

f=28.0

f=28.1

f=28.2

F=29.0 …

f=28.0 f=28.1 f=28.2 f=29.0

Step 4: Open the test images in an image processing software. Magnify the square

lines and place magnetic guides that match the square exactly. Mark the 1m x 1m

table and copy it into a new file. Check the image dimensions. When you have found

a perfectly square table you have found the correct effective focal length.

Step 5: Enter the correct effective focal length in the software. Change TDI Stages to

20x. Create test scans of the square and change the rotation point every time. Save

the images and open them in an imaging processing software. A perfectly square

table indicates that the right rotation point has been found.

4.2 … obtain the best sharpness (continued)