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Manufacturer description: This multi-coated optical glass doublet is our most popular optic, providing a tack-sharp Sweet Spot of focus with a minimum of diffusion at all aperture settings. Part of the Lensbaby Optic Swap System.
The Double Glass comes with an f/4 aperture disc included. If you have not previously ordered a product with the full aperture set included and would like to use more than the f/4, be sure to purchase the Replacement Magnetic Aperture Set separately.
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