From Digital Camera Info, a list of specifications and a first picture:
http://digicame-info.com/2016/06/hd-pentax-da55-300mm-f45-63-ed.html
- Rear focusing system to significantly reduce the weight of the focus group
- PLM (Pulse Motor) to reduce the autofocus noise
- Compared to the current 55-300mm, focus is 8.3 times faster on the wider angle side and up to 1.7 times faster on the telephoto side
- First K-mount lens with electromagnetic diaphragm
- High-precision exposure control in movie mode when paired with K-70
- Minimum focusing distance: 0.95m
- Maximum magnification: 0.30x
- Filter diameter: 58mm
- 14 elements (of which one made of ED glass) in 11 groups
- Collapsible structure and compact, lightweight design
- Total length: 89mm; maximum diameter: 76.5mm
- Weight: 442 grams
- Drip-proof structure sealed in 11 places
- HD coating. SP coating
- Nine rounded aperture blades
- Quick Shift Focus.