Recent content by LightningInAJar
-
L
Medical Age and carotid artery stenosis
Interesting article. Thanks.- LightningInAJar
- Post #3
- Forum: Biology and Medical
-
L
Medical Age and carotid artery stenosis
Any gerontology people here? I was wondering if narrowing of one or both carotid arteries to a concerning degree is common in those at age 80 and older? Or is that a less than say 5% of the older population type thing?- LightningInAJar
- Thread
- Replies: 2
- Forum: Biology and Medical
-
L
Draining batteries into fewer batteries
I had to look up TIL.- LightningInAJar
- Post #11
- Forum: Electrical Engineering
-
L
Draining batteries into fewer batteries
Am I safe in assuming that different electronics will stop working at different levels of remaining energy storage in a battery? Assuming a person has many batteries with a little juice left, but not enough to work most electronics can it be transfered efficiently to rechargeable batteries with...- LightningInAJar
- Thread
- Replies: 13
- Forum: Electrical Engineering
-
L
I Help with my Polar Aligning Star Tracker please
Hypothetically has anyone ever created a lens that has a wider angle with a telephoto fused in the middle to help find objects in periphery, and align them in center after finding them for scoping purposes?- LightningInAJar
- Post #16
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
Thanks for the video. I don't think either of these had a scope though. Aligning seems to be the bigger issue for me. I saw the knob near the pad but didn't realized it helped to rotate the camera since I was focused on polar aligning before attaching my camera. In retrospect I should align...- LightningInAJar
- Post #14
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
No I don't. I can possibly get the scope facing polaris, but even if the camera can pivot a little it is either facing north or pointing towards the ground at roughly 40 degrees.- LightningInAJar
- Post #11
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
Looks like camera would need to also face north like in your diagram. Otherwise in the other direction facing roughly 45 degrees towards the ground. This image from manual seems to show some cylinder on top of rotating arm with a ball joint that a camera is attached to. I don't seem to have...- LightningInAJar
- Post #9
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
Yes but camera would also be facing north? Sun and moon would be more in the middle of the sky as well as most of the galaxy? I was going to try tracking the moon first since it is closer and I can see its edge if it starts to drift over time in relation to tracking.- LightningInAJar
- Post #8
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
I have seen stars with 360 camera doing long exposure and was going to try to filter out more red light when possible.- LightningInAJar
- Post #7
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
In the cover diagram it looks like the camera is pointed in same northern direction as the scope that sees north star. I want to look away and a bit up to see most of the sky.- LightningInAJar
- Post #6
- Forum: Astronomy and Astrophysics
-
L
I Help with my Polar Aligning Star Tracker please
I bought the Star Adventurer 2i and could use some help aligning it. I live in the northern hemisphere. I can find polaris using a free AR star finder app, but can't see it in the sky nor the dipper. Possibly too close to nearest city. Also cloudy kind of a lot in the northern sky. I would like...- LightningInAJar
- Thread
- Replies: 18
- Forum: Astronomy and Astrophysics
-
L
I Using primary color light filters
How short? ISO only as high as 800 to keep noise down? Wide open aperture?- LightningInAJar
- Post #20
- Forum: Other Physics Topics
-
L
I Using primary color light filters
I was using manual but largely kept aperture pretty wide open I think. I actually don't remember. With a longer expose in like 6 seconds or longer range I imagine I might of got up to F/8. I would need to inspect the files to be sure though.- LightningInAJar
- Post #19
- Forum: Other Physics Topics
-
L
I Using primary color light filters
I have used zoom to manually adjust focus for distant objects, but as far as long exposures I'm not sure the view screen will give me an accurate idea of what I'll end up with. I took many photos with slight changes. I have exposure stacked to increase dynamic range, but honestly I don't care as...- LightningInAJar
- Post #16
- Forum: Other Physics Topics