Wide Angle Attachment 0.8x
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For short projection distances or rear projection, ISCO offers a wide angle attachment with a factor of 0.8. It can be used with the standard lens of nearly all projectors.
Tele Conversion Lens 1.25x
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The high quality tele conversion attachment from ISCO increases the focal length of a standard prime lens of the projectors by a factor of 1.25 (without changing the f-stop value). The projection ratio is increased by the same factor.