Hi, I've just been doing some water splash photography and had rather unexpected results.
My camera is a K1 set to record DNG to card 1 and JPEG to card 2 and is in manual mode with IS and most other options turned off such as (lens correction, AA sim, d-range, noise reduction etc). I just want the camera to take images without any intervention and all sort any issues later in post.
For the first image (IMGP0052.jpg) the camera was set to iso100, 70mm, f8, 1/125 with the HD Pentax-D FA 24-70 f2.8 lens fitted, the Yongnuo 560III was set to 1/128 (minimum) power so the T1 time is pretty quick (1/23041), a fake ice cube was dropped into a glass of water and an image taken. However the water splashed seem to have a ghost, there is one bright image and then offset from this is a darker version. The distance of the offset is not consistent, some are further apart than others, also the ghost are not exactly the same shape. Looking at the ghost images its as if the camera took two images a short time apart and thats why the water droplets have moved (gravity) and are a slightly different shape. The glass however is perfectly sharp with no ghost.
I took a second image (IMGP0060.jpg) iso100, 160mm, f8, 1/50 with the HD Pentax-D FA* 70-200 f2.8 with a blue gelled background but with the same speed light power (1/128) and had the same ghosting result so I feel its not a lens issue. I also tried turning IS ON, no change so switched it back OFF.
Does anyone know whats happening?, is the camera recording some kind of internal reflection, is it related to the shutter mechanism? or is it due to internal processing on the camera?. Any help greatly appreciated.