I would like to take HDR time lapse photos on my Pentax K-50. That means I want to take a set of three bracketed exposures, then another three exposures 10 seconds later, and so on.
As far as I can tell there is no way to do this using the camera's built-in "interval shooting" feature, because if I activate both exposure bracketing and interval shooting, the exposure bracketing setting is ignored.
However, what I can do is set the camera up so that a single press of the shutter release takes three bracketed exposures. So if there is an external device that can trigger the shutter at timed intervals then, hopefully, that means I can take bracketed exposures at regular intervals.
However, I haven't been able to find such a device for sale online. I can find infrared and cable-based shutter releases for Pentax cameras, but I haven't found one with a built-in interval timer. Does such a device exist, and if so what is its name / model number? Or is there another way in which one can take HDR time lapses on the K-50?