HP xb31 manual Sb21, Adjusting the hp sb21 focus

	operation
Adjusting the hp sb21 focus
Rotate the focus ring until the image is clear.	sb21
The projector will focus at distances from 1.0 m to 12 m (3.3 feet to 39.4 feet).
Focus Ring

Projected image size (diagonal)

Focal Distance

Calculating the Projected

Image Size

The screen diagonal dimension can be approximated by using one of these formulas: 7.5*Distance(ft.)=Diagonal(in.) 0.625*Distance(m)=Diagonal(m)

For example:

If your sb21 is 10 feet from the screen, the approximate screen diagonal dimension will be 7.5*10 = 75 inches.

Screen	25”	98”	123”	197”	246”	295”
(Diagonal)
Screen	20.0”x15.0”	78.4”x58.6”	98.4”x73.8”	157.6”x118.2”	196.8”x147.6”	236.2”x177.2”
Size (wxh)
Focal	3.3’	13.1’	16.4’	26.2’	32.8’	39.4’
Distance

NOTE: This graph is for user’s reference only.

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