Uploaded May 2023 | Updated September 2026, 3 hours ago
This is a timelapse video of 3 hours 15minutes, 1 frame a second.
Showing the focus drift from cold to really warm on my Sony 590ES projector.
(IT ACTUALLY LOOKS WORSE IN REAL LIFE)
It should stop drift after 30-40 minutes (about 1 minute of the video)
(this is the memory save)
50 seconds is about 25-30minutes, still ok focus.
1 min 45 sec is about 45-50 minutes
3 minutes is about 95 minutes
5 minutes is about 2 hours 20 minutes
6.55 end is after 3 hours 15 minutes
(yeah i'm bad at math ) ;)
It does this no matter how it is placed.
I have tried standing upright on a shelf, upside down on shelf, and hanging in the roof. It actually gets a little worse in the roof.
Also tried rising the temperature in my room from 19c to 23c.. no difference.
If i save at 1 hour, i get sucky focus the first hour. And then gradually worse again.
If i save at 90 minutes, it get even worse focus the first hour. And then worse again as it drifts past.
One weird thing also is: i have mounted the camera on a tripod, it stands on concrete floor in a basement. I was not in the room for 3 hours.
In spite of that the picture seems to be moving around. But what i know there is no function to move picture to prevent burn-ins on a projector. And i don't think there is one in my mediaplayer (Dune pro vision 4k solo).
This is a timelapse video of 3 hours 15minutes, 1 frame a second.
Showing the focus drift from cold to really warm on my Sony 590ES projector.
(IT ACTUALLY LOOKS WORSE IN REAL LIFE)
It should stop drift after 30-40 minutes (about 1 minute of the video)
(this is the memory save)
50 seconds is about 25-30minutes, still ok focus.
1 min 45 sec is about 45-50 minutes
3 minutes is about 95 minutes
5 minutes is about 2 hours 20 minutes
6.55 end is after 3 hours 15 minutes
(yeah i'm bad at math ) ;)
It does this no matter how it is placed.
I have tried standing upright on a shelf, upside down on shelf, and hanging in the roof. It actually gets a little worse in the roof.
Also tried rising the temperature in my room from 19c to 23c.. no difference.
If i save at 1 hour, i get sucky focus the first hour. And then gradually worse again.
If i save at 90 minutes, it get even worse focus the first hour. And then worse again as it drifts past.
One weird thing also is: i have mounted the camera on a tripod, it stands on concrete floor in a basement. I was not in the room for 3 hours.
In spite of that the picture seems to be moving around. But what i know there is no function to move picture to prevent burn-ins on a projector. And i don't think there is one in my mediaplayer (Dune pro vision 4k solo).
