Very interesting, didn't know about that indeed. What is the exposure limit etc, I guess still about 15 seconds per image?

For this example lights were taken with an exposure time of 20 seconds per image. Depending on quality of calibration (gps/compass), focal length and location of the subject, theoretical exposure times can go up to one and a half minute (200mm lens, limited by translation and rotation of the sensor). Practically, I never managed above 50" without ending up with unwanted trails. I am generally happy when I manage 20 or 30" exposure times. Other focal lengths will result in other exposure times.

That's certainly impressive for a non tracked setup, thanks, nice to know.

@ah_astro

Nice. I read about some of these pentax cameras with j built sensor tracking capability I think. Was this one of these models? Nice shot at that focal length

@cwm2col

Thanks. The above image was taken using a Pentax K1, which has the sensor build in. In the past I have also tried the separate O-GPS1 which I think gives similar results when it comes to the tracking itself.