The Seiler ZOOM Objective Lens come standard 250 mm with the Evolution ZOOM Surgery Microscope. Other objective lens lengths can be interchanged on the scope before it is sent to the customer.
250 mm (50 mm = 2 inches) gives the user about 10" of working distance (300 mm = 12", 350 mm = 14", etc.).
Seiler ZOOM Objective Lens Sizes:
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175EZM: 175 mm.
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200EZM: 200 mm.
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250EZM: 250 mm.
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300EZM: 300 mm.
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350EZM: 350 mm.
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400EZM: 400 mm.
