The H6X lens program is designed and engineered by Hasselblad to meet the highest optical performance specifications. The HC and HCD lenses cover a wide spectrum of focal lengths and feature the fastest and most precise auto-focus system there is today. The unique HCD 24mm wide-angle lens, the HCD 28mm and the HCD 35-90 zoom lens have been tailored for digital use with a 37 × 49mm sensor, but can of course also be used with larger sensors with a minimal drop in performance in the extreme corners. The integral lens shutters allow for flash sync up to 1/800 second. The lens shutter also provides silent and vibration-free operation.The viewfinder is the most important interface between the photographer and the subject. The large and bright viewfinder of the H6X camera shows the image crisp and clear, letting you work even in dim lighting with perfect results. The HV 90X-II viewfinder covers the full area of the HC lens line and offers near 100% image view and eyesight dioptre correction. The large eyepiece also allows full image view even when wearing glasses. The HVD 90X has been optimised for digital work with the digital sensor size of 37 × 49mm. The HVM, a waist-level viewfinder, is available as an accessory.