pearlmsqueaks, adash, duckduckninja, troch, pangmark & dakadev_pui.
Wise framing, but redscale needs more overexposure. Generally two stops, but it can usually take four stops or even more. That's because you are exposing it from behind and too much light is lost in the process.
Thanks! I do try to overexpose, but the Horizon is entirely manual and with some shots I just don't have time to get out the light meter -- my guesses are usually OK, but this one could have been better.