From the ManufacturerLensCoat lens covers offers your valuable equipment some protection from scrapes and bumps, preserving its resale value. The LensCoatExtender set includes a cover for the Sony 1.4 and 2.x extenders. Two small holes line up with the white dot indictor, making it easy to quickly line up your extender with camera mount and lens with the cover installed as well as a hole for the extender release.