Schneider Optics 138mm Water White Full Field Diopter Lens (Close-up Filter)

Schneider Optics 138mm Drop-In Diopter Full Filters 1/2 - 3 

Full Diopters. 4 strengths to choose from. Each diopter has a "hard" anti-reflective coating on each side. Shipping price includes insurance.

Features:

Made from Water White glass with anti-reflective (AR) coating on both front and rear surfaces; reduces light loss and flare and ensures proper color, contrast and overall image sharpness

Screw-on versions are supplied with brass mounting rings while drop-ins feature anodized aluminum rings

These lenses can be used individually or in any combination to achieve ultra-close focus

The maximum magnification achieved with these attachments will depend on the focal length of your lens as well as the actual close focusing capability of that particular lens

A +1 close-up lens will allow you to focus your lens somewhat closer than it already does; A +2 close-up lens will allow you to focus closer than the +1; A +4 lens will allow you to focus even closer than a +2

A +1 combined with a +2 will equal a +3, while a +2 combined with a +4 will equal a +6, and so on