Originally posted by Ex Finn. I'm going to have to learn about taking photos in this mode. Is it one of the mode where the camera only takes in an image every time something in the sky changes ?
As far as just taking a 20 second exposure - I can't see where you'd get those long star trails at such a small amount of time....
---------- Post added 10-05-21 at 09:34 PM ----------
I'm at it again. Taking some star trail pics. Just took one at about 15 minutes from the back porch, and there is a lot of brightness in the photo. Will post it's pic in a few minutes.
Right now, I moved the camera to the back yard and pointed the camera straight up in the sky. Taking about a 10 minute exposure this time. Will post it also in a few minutes.
Will post both without post processing...
In the mean time. I'll share a story. When I taught 6th grade Science, the Science teacher on the other team was an Astronomy enthusiast. She smoked, as did I and I still do. She told me once that when she went to one of the nightly meetings, where everyone brought their telescopes, that she was smoking. Some of the other people got a little perturbed and told her that she would have to walk X feet/yards away to have a smoke, because they feared the smoke from the cigarettes would contaminate the lens on their telescopes. Some of them had pretty expensive telescopes. I think they were more concerned with smoke particles sticking to the telescope lens and affecting the image(s) they were seeing.
---------- Post added 10-05-21 at 09:59 PM ----------
All at f4, ISO 100, smc Asahi Pentax m-50mm macro f4 lens. No post processing on any of them yet....
Well, These 2 were from the back porch. A lot of over exposed areas.
And this one, from the backyard pointing straight up for 10 minutes. Nothing to see here at all - quite the opposite of the over exposed first 2. I guess I need to up the ISO when trying this again (tomorrow night)...
---------- Post added 10-05-21 at 10:04 PM ----------
Addenum: Nearly no histogram on the last one. I did mess with the "levels" in Gimp and got this out of it - lol....
Addendum: I just noticed that I had the switch set to AF instead of MF (manual) on the camera body to tell camera what type of lens is attached - don't know the affect this has had. Certainly did not use the green button for exposure. I expect switched to AF is more to tell camera body if one has an automatic lens attached...