Whether you're shooting digitally or on film, Fotodiox offers the world's largest selection of lens adapters. Mix camera/lens platforms or reinvigorate vintage glass; Fotodiox has hundreds of ways to mount lenses onto your DSLR or SLR camera. Our adapters deliver infinity focus, manual aperture control, and a sturdy build for lasting quality.Astro Edition adapters are designed specifically with Astro Photographers in mind and includes an extension tube for focusing with some telescopes which may have problems adjusting focus far enough out. The extension tube is removeable revealing a standard T-Mount adapter for telescopes that focus close enough to the mirror or have a Barlow lens installed, or if you want to use T-Mount lenses and accessories as well during the daytime.Fotodiox employs Professional Photographers in every aspect of development and design to create products that are built to last. The Pro line of adapters is crafted to withstand the rigors and demands of the professional photographer. The all-metal adapters are manufactured with precise tolerances, providing a solid, gap free, no wiggle connection for stress free use. All Fotodiox products are backed by our 24-month Fotodiox Manufacturer Warranty.Notes:This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted.Some cameras need to be set a certain way to work with our adapters or you may get a message such as 'Error Lens Not Attached - Check lens'. Please check the support articles on the Fotodiox Knowledge Base for possible solutions on a variety of camera brands.Set your exposure manually or meter using your camera's Aperture Priority (stop-down) mode.All pictures are for illustration purposes only. Actual product may vary slightly due to ongoing improvements in design.