Seals in the Glacial Lagoon

Our zodiac driver killed the engine and we could hear the thunderous sound of ice breaking off the glacier in the distance. From there, it then enters this lagoon, giving the Seals something to rest on. These Harbor Seals were a ways off so I had to use a 1.4 extender on a 300mm bringing it to 420mm. Also had a super fast shutter speed to prevent any motion from the rocking boat. I was using the Olympus 40-150mm f2.8 with the extender which is far lighter than a prime 300mm would have been on a DSLR. I think this makes it a bit easier to handle.