Thank you for your comments. The Tascam 40 looks like a good option. I wish it has a hot shoe foot. I'd rather not have to hold it while I operate the camera. Maybe a double cold-shoe connection to a bracket would be an option. I like the looks of the hammer & Anvil microphone. I'm disappointed with the Sony shotgun microphone. I like the feature of making a separate mp3 recording on a memory card with the Tascam 40. That would be a lot easier than copying the sound track from the video. The Tascam 40 has a lot of features for uses away from the camera. I'm using a Sony voice recorder UC-560, with my smart phone, to record and later listen to radio broadcasts. It's something to think about. The question is: which is better Sarmonic or Tascam?
KM7D, Sony A350, A580, A-700, A57, A65, A5100 , a6500 , & a7iii, plus a bunch of lenses.