That sounds a bit weird to me. Here is (a selection of) what PhotoME finds in an Astrotracer image taken with a purely manual lens, smc Pentax-M f/2.8 100mm:
Make: PENTAX (
Global Site | PENTAX RICOH IMAGING)
Camera: PENTAX K-5
Lens: K or M Lens
Software: K-5 Ver 1.14
Dimension: 4928 x 3264 px (16.1 MP, 3:2)
Focal length: 100 mm (equiv. 150 mm)
Exposure time: 15"
ISO speed rating: 400/27°
Program: Bulb (Off-Auto-Aperture)
Metering Mode: Center-weighted average
White Balance: Daylight
Focus Mode: Manual
Image Stabilizer: 192
Noise Reduction: Off
This was shot with a K-5. I believe your camera is a K-30 and I cannot rule out, that there might be a difference here? I trust that you do enter the focal length when you turn your camera on.