The lens is sealed against dust and moisture, and Panasonic says that it will function down to -10°C/+14°F. It weighs in at 790g (1.8 lbs) and accepts 77mm screw-in filters.The 70-300mm F4.5-5.6 Macro OIS will ship in April with an MSRP of $1249, though it will be offered at a $999 promotional price at launch.