Reflecta SERIES 3000 - Manual (Page 13)

13
Short description:
■ Three-element coated lens with long focal
length for large rooms
■ Focal length 180 mm
■ Shaft 42.5 mm for Classic series projectors
and 1800 AF
Item no.:
Agomar MC 3.5/180.....................Item no. 1047
Agomar MC 3.5/180 Focal length table
Short description:
■ Wide aperture, rapid, multi-coated lens with
4 elements, top quality
■ Focal length 85 mm
■ Shaft 42 mm, for 2000 AF projector only
Item no.:
Agomar 2.8/85 MC.....................Item no. 16954
Agomar 2.8/85 mm MC
Short description:
■ Zoom lens which adapts to any projection
situation. Covers a larger range of focal
lengths, 7 elements, coated.
■ Focal length 70 mm to 120 mm
■ Shaft 42 mm for series 2500/3000 projectors
and 2000 AF/AF-IR
Item no.:
Vario Agomar MC 3.5 / 70-120...Item no. 16952
Vario-Agomar MC 3.5/70-120
Short description:
■ Zoom lens which adapts to any projection
situation. Covers a larger range of focal
lengths, 7 elements, coated.
■ Focal length 85 mm to 150 mm
■ Shaft 42 mm for series 2500/3000 projectors
and 2000 AF/AF-IR
Item no.:
Vario Agomar MC 3.5 / 85-150...Item no. 16953
Vario-Agomar MC 3.5/85-150
Calculating the focal length of a lens:
Slide width (mm) x projection distance (mm)
Projection screen width (mm)
= Focal length of lens (mm)
Example:
36 mm x 4500 mm
1800 mm
= 90 mm
Calculating the projection distance:
Focal length of lens (mm) x Projection screen width (mm)
Slide width (mm)
= Projection distance (mm)
Calculating the projection screen width:
Slide width (mm) x projection distance (mm)
Focal length of lens (mm)
= Projection screen width (mm)
a = Light angle b= Projection distance c = Slide width d = Focal length