Variable vs Moveable

• Compared to the moveable lens systems with a 'sled', variable Prismasonic lenses are more compact and cost effective but still offering exremely high optical performance


• With variable Prismasonic lens one can adjust the picture width to match the screen perfectly no matter if the screen ratio is 2.35:1, 2.37:1 or even 2.40:1. This is not possible with the fixed moveable lens system.


• If the movable fixed lens introduces any horizontal or vertical offset, it will be shown as an asymmetric location for the 16:9 image on 2.37:1 screen, after moving the lens away from the beam. Since the variable Prismasonic lens has the same optics always in front of the beam, this offset is will be same both for 2.37:1 and 16:9 movies, and thus the perfect location for images of all aspect ratios is maintained on the 2.37:1 screen.


• With variable lens it is possible to achieve full panel resolution for also intermediate aspects such as 1.85:1 and 2.00:1. This naturally is not possible with fixed moveable lenses.


• Some projectors have the front ventilation next to the optics. It can be defective for the projector to 'park' the lens in front of the air ventilation with the fixed moveable lens. Prismasonic lens stays always in front of the optics thus allowing the front ventilation of projector to operate in an appropriate way.


• The claim that variable lens compromises the image quality for both aspect ratios is not true. The 5-element Prismasonic HD-5000 series has strongly shown that with the advanced optical design the solutions against astigmatism, chromatic aberration and focus shift, also simultaneously for wide range of aspect ratios, can perfectly be discovered.

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