Stackoverflow discussion: https://video.stackexchange.com/questions/21932/can-continuo....
Even the stackoverflow answers say as much. Most of the thermal ramping occurs in the first five minutes and then stabilizes after cache is exhausted. As all these dslr’s allow you to record 29m50s videos back to back all day long it’s also indicative that it’s not a big enough issue in returns to warrant addressing in their firmware.
As you’re not writing to the SD card, hdmi passthrough should yield an overall lower operating temperature after an hour than writing to the SD card when recording video after even 10 minutes.
I tried getting to the source of this rumor. Didn’t find one particular origin, just speculation amongst Redditors and Twitch users about the 30 minute limit and bypassing it with the Nikon or Canon firmware mods will void your warranty.
It will however introduce more noise. Particularly at higher ISO’s. Astronomy photographers (a major driver of the firmware hacks in the first place - see “Nikon stareater bypass”) have cooling solutions available there too.
Edit: Yup. https://petapixel.com/2012/05/21/30-minute-video-limit-in-di...
> At present [2012], digital cameras' video cuts off after 30 minutes to avoid them being classified as video cameras (which attract 5.4% duty because they are considered to be video recorders
EDIT: I had it backwards. The tax is on trucks and it gets circumvented by importing them as passenger cars: https://en.wikipedia.org/wiki/Chicken_tax
This Japanese article describing the agreement especially for cameras. I can't find English articles like this.
https://av.watch.impress.co.jp/docs/series/zooma/1171774.htm...
This is the original agreement text that's too long didn't read.
curious.
what would it take for you to be convinced it does no harm? Just a psychological curiosity -- not trying to annoy you.
The opinions seem fairly stacked, and the corporations seem to be fairly non-chalantly enabling video/high-volume sampling on these sensors.
The only person in your linked SO thread said "it might wear out the sensor because it wasn't designed for that amount of sampling", so one google's 'Can you wear out a CMOS image sensor from over-use?', and get linked to another SO thread where it's more-or-less concluded that the CMOS sensor doesn't wear practically.[0]
I can understand the 'calculated risk' mentality, but honestly it seems like physical jostling from unpacking the equipment from its' case or exposure to a mid-high level humidity environment, stuff that's done every day by photographers around the world, would be many times more damaging to the investment that just running the solid-state components more often.
Not many DSLR appliance failures are from solid-state device failures.
[0] : https://photo.stackexchange.com/questions/15127/do-sensors-w...
In my dream scenario? I think I'd love to see a scientific analysis on the topic and some real data. A blog post with someone taking apart a DSLR, instrumenting the sensor and the surrounding electronics with a thermocouple to measure how hot it really gets over time, and proving it doesn't get to a point of damage would go a long way for me, and I would generally be interested in it. How hot does it actually get??
The wishy-washy "wear out" arguments I don't find particularly convincing (I did FPGA design for an endoscopic camera company for a couple years, so I am familiar with CMOS sensors in general). These DSLR sensors are quite large and I imagine can produce a significant amount of heat, and for all intents and purposes are built into systems that are intended for periodic use with photography. The manufacturing tolerances needed to build a system safe for continuous sampling/use don't particularly make sense when designing a photography camera ($$$). I'm dubious the manufacturers actually did the design optimizing for video use, and I presume this is why there are warnings in the manuals about continuous video use and limitations in the firmware. Maybe there's enough tolerance to handle some video, but not all the time.
I think I was a little careless in specifically calling out "sensor damage" — I'd actually be more concerned about the surrounding components than the sensor itself. Capacitors age and change tolerance in response to temperature cycling, for example.
Here's a study from 2014: https://www.lmscope.com/en/warming_camera_sensor_en.html
You can see a sharp rise in the first 15 minutes and the camera asymptotically approach 43ºC after an hour.
Nikons are rated for 0-40ºC so there is some truth to them not wanting to warranty cameras used for more than half an hour.
But 43º??? Come on. These components are easily rated for 60º.
Anyone that's done any weather testing on consumer electronics can tell that it's the process of thermally cycling the DUT that will kill you (i.e. going from 20º to 30º hundreds of times, not holding it at 40º).
If you are worried about the heat, I may recommend you mill off the CCD and install one of these bad boys: http://instein.eu/d3000.htm
I have often left my D750 running for 8+ by mistake.. it's happy as.
The sony a5100 is really popular with twitch streamers right now because it will run all day in this mode and you can turn off all of the UI elements to get a 'clean' output. You don't get all the cool cinema features but you do get a camera that is better than just about any webcam.