Abstract: A shroud for a pipe connection includes first and second clamshell halves, a flexible hinge between the first and second halves, a snap connection connecting the first and second halves and a drip tube extending from one of the first and second halves. A pipe connection including the shroud is also disclosed.

Abstract: A method for determining the spacing between adjacent vantage points for taking a 3-D photograph which involves computing the desired spatial parallax in accordance with the following formula: ##EQU1## where P is the desired spatial parallax, V is the viewing distance and E is the capability of the eyes to fuse the two images together expressed in terms of arc minutes of the scanning angle and utilizing results of this computation to compute the distance T between adjacent vantage points in accordance with the following formula: ##EQU2## where B is the distance between the camera and the background object and K is the distance between the camera and the key subject and u is the back focal length of the camera lens. A calculator has been provided for making the necessary calculations.

Abstract: A method and apparatus for achieving uniform density of image elements of a 3-D photograph by using a 3-D printer with a linear motion blade shutter which travels at varying speeds during printing a negative view to control the duration of exposure across the 3-D photograph. The scanning speed of the linear shutter is varied during the exposure of each of the 2-D negative views and is based upon the position of the 2-D negative view in relation to the field of illumination of the enlarging lens in order to compensate for the non-uniformity of illumination due to the vignetting effect.

Abstract: A method and a printer for printing an image array on the photosensitive surface of lenticular print film from a set of 2D views which involves moving the negative carrier on the printer in accordance with the equation ##EQU1## where S is the distance between key subject images of adjacent 2D views,T is the separation between adjacent camera lenses,F is the back focal length of the camera lens,K is the distance between the lens of the camera and the key subject K' and moving the negative by the appropriate S value between printing of adjacent 2D views.A fully automatic and semi-automatic printer is provided.