A new Micro-4/3 mount Speed Booster adapter designed exclusively for the Panasonic GH4 and other selected Micro Four Thirds cameras (refer to the below camera compatibility table), with a magnification of 0.64x. The Speed Booster XL 0.64x uses an advanced 6-element optical design to achieve extraordinary optical performance at apertures up to an incredible f/0.80, a new record for Micro Four Thirds format. This item is sold as seen for spares or repair. Please read the description in full before purchasing. Spares and repair items do not come with a warranty but do represent potentially excellent value. All faults or issues are fully described. Cosmetically this item would be placed within our Excellent condition rating. Please Note: This item is non-functional. Due to an electronic fault, the item does not communicate with the attached lenses and only produces black images. For this reason, this item is being sold for spares and repairs.