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29th May 2006, 09:00 PM
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diyAudio Member
Join Date: Jan 2006
Location: Los Angeles, CA
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Comparing these 17" Projector design
Projection lens FL = 500mm
#1 Condensor Fresnel :220mm Field Fresnel: 650mm #2 Condensor Fresnel :330mm Field Fresnel: 330mm What's pro/cons different of those setup? How does the diameter of projection lens would make different if they are the same focal length? (Says 10cm and 13.5cm). Thanks for any comment. |
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