The Seiler Objective Lens come standard 250 mm with the Evolution xR6, IQ, and Evolution ZOOM Dental/ENT Operating Scopes, and Colposcopes. Other objective lens lengths can be interchanged on the scope before it is sent to the customer.
250 mm (50 mm = 2") gives the user about 10" of working distance (300 mm = 12", 350 mm = 14", etc.).
Seiler Objective Lens Sizes:
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7-175L: f = 175 mm.
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7-200L: f = 200 mm.
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7-250L: f = 250 mm.
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7-300L: f = 300 mm.
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7-400L: f = 400 mm.
Seiler Objective Lens Literature:
Seiler Dental Products Catalog
