see also:

• a brief catalogue of Micro Four Thirds lenses
• Panasonic Leica DG Elmarit 200mm F2.8 Power OIS lens
• Panasonic Leica DG 100-400mm ASPH f/4-6.3 lens

• the Panasonic Leica DG Vario-Elmarit 50-200mm f/2.8-f/4.0 (100-400mm lens in full frame FOV terms)
• shipping May 2018

• 50-200mm (100-400mm lens in full frame FOV terms)
• weathersealed
• Power OIS image stabiliser
• close focus 0.75m
• 21 elements in 15 groups
• 9 rounded blades
• 67mm filter thread
• 76 x 132mm (2.99 x 5.20″)
• 655g (1.44lb)
• $US1699
• compatible with DMW-TC14 and DMW-TC20 teleconverters
• no focus limiter switch

• my blog post comparing it to Olympus and Canon alternatives