Digital this time.
I've discovered "tram lines" (well, a single tram line) about one pixel wide running vertically through a series of images I've taken at night using long exposures. No sign of the same effect in ordinary pictures taken in ordinary conditions. Unfortunately I'm currently about 8,000 miles away from where I've stored the other night-time pictures taken with the same camera but I don't recall seeing tram lines previously.
I'm wondering if this is a known effect with low light levels and CCD devices or something else is happening?
I take a lot of photos using roll film so I'm used to tackling tram lines in that context but in digital? What's going on?
Camera is an old Fujifilm S1500 with a 10Mp sensor, if that's relevant.
Thanks,
Nick PS, please don't infer anything from any lack of response from me at any time. We've had several bouts of periods of days without electricity out here and no electricity = no internet so connecting to uk.d-i-y can be an issue somethimes.