BullsEye Camera-Alignment Mirror

BullsEye Camera-Alignment Mirror



       The BullsEye provides a quick way to avoid getting a keystoned image, when photographing flat artwork.


       The typical approach for squaring the camera with the art work is time consuming, taking measurements, using a carpenter’s square, T-square, etc.  Simply centering the object in the camera’s viewfinder does not guarantee a rectilinear image.  With the BullsEye, it is not necessary to know any dimensions or the angle of the painting to photograph it as a rectangle.  


      The BullsEye™ is the shape of a hollow spool.  A mirror is attached at one end, facing inward.  A curved wire handle loosely holds the device by side holes at its center of gravity.  A strap attached to the wire handle, holds the BullsEye™ from above.  The pressure against the artwork is a small fraction of the weight of the BullsEye™.  A felt backing on the mirror prevents damage to the painting.

Force = 3 oz. x (tan strap angle, from vertical)

Angle of cloth strap
Force on painting
0.05 oz.
0.10 oz.
0.21 oz.
0.42 oz.
0.53 oz.


To photograph a hanging painting:


To photograph a propped-up painting:



  • This seems to be exactly what I need“, Christine Smith, Nov. 4, 2019


For more information:

Photo Imaging News, Volume 21, No. 13, June 14, 2004



Hines’ lab notebook #1, p. 58 entry for this invention.


     HinesLab is actively seeking licensees to commercialize this technology.  This is not a product being offered for sale to end users.  To discuss licensing, please contact Steve Hines at:


Glendale, California, USA
email: Steve@HinesLab.com