Aha, that makes sense
Z8 Overheating
- Thread starter Nimi
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Calson
Well-known member
There is a reason why pro video shooters prefer using camcorders like the Canon EOS C300 where one can shoot a video until there is no room left on the storage media with no worries about overheating.
For video the zoom lens choices drive the camera mount needed. This is something I am facing with the new Sigma 60-600mm lens that is currently available only for the Sony E mount and not for the Nikon S-mount or even the Canon RF mount that is used with the Canon R5 C cine camera.
As I get more into shooting wildlife videos I will most likely need to add a Sony camera to my two Z9 cameras so as to be able to use this Sigma lens.
For video the zoom lens choices drive the camera mount needed. This is something I am facing with the new Sigma 60-600mm lens that is currently available only for the Sony E mount and not for the Nikon S-mount or even the Canon RF mount that is used with the Canon R5 C cine camera.
As I get more into shooting wildlife videos I will most likely need to add a Sony camera to my two Z9 cameras so as to be able to use this Sigma lens.
The new class of hybrids is certainly changing the landscape, especially for the independent solo-shooters who have moved to the R5C, C70, FX3, 7S3 etc. And increasingly the Z9.
The 60-600 is a stills, not a cine lens. Only broadcast l-style lenses have 10x+ zoom in cine world. And the RF mount is a closed to everyone, not just Sigma. Canon is very protective of it, actually I don't think even they make too many RF-mount cine lenses, mostly EFs.
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Might not adapting that 60-600 to Z mount be an option? I know many proclaimed good results adapting the Sony 200-600 to Z mount while waiting for a Nikon 200-600. Might be worth looking at?
urbo73
Member
So it looks like they introduced the lower ISO for N-log in FW4.0, and you can go to Lo 2.0 which is ISO 200 equivalent. So 2 more stops from base ISO 800. What I'm not sure about is if indeed the DR is the same now from ISO Lo 2.0 (200) all the way up to 800. Nikon says this:
The maximum output level for videos recorded at low ISO sensitivities drops due to loss of highlight data. We recommend that you select a low value for Custom Setting g13 [Zebra pattern] > [Highlight threshold] when using the zebra pattern feature. A highlight threshold around [230] is recommended for Lo 0.3 to 1.0 and [200] for Lo 2.0.
I'm not sure what "loss of highlight data" means and why. Is it shifting the DR to the shadows?
I'm trying to figure out if indeed using these lower ISO (200-640 equivalent) will incur any penalty over ISO 800.
On the other hand, I know ISO 4000 is clean, but not sure what DR or other sacrifices one would make using ISO between 800-4000.
And does all this also apply when shooting SDR and not N-log (in terms of DR across all ISOs)?
In my experience, there is no loss in DR when using the Lo. settings, the scale (say 12 stops) simply slides. I use the settings as I use an ND filter and when I have to shoot wide open. So a typical situation is shooting outdoors, day-end, an high dynamic range scene that calls for an f2.8 on the 70-200 with 24fps and 180 shutter angle. Normally I'd have to slap a 2-3 stop ND, now i put it on Lo and no ND. and use think Undone recently mentioned this when talking about the new iPhone and how it does the same thing.
I never shoot off-native, so I don't have experience to share at the range between the dual Native points. I only shoot Log, so can't comment either.
urbo73
Member
Yeah, it's good for 2 stops, but it does seem to clip highlights more than at 800, so I think it's sliding the DR range down.
On a sunny day, even at Lo 2.0 I still need to use 3-4 stops of ND when shooting 1/50 2.8
Mid-day (all my outdoor shoots are in the tropics) I'm >5 AND a cold beer.
He's reflecting the consensus: If you must have video footage, get a cinema camera or a Z9. The Z9 is an exception in the hybrid segment of the industry; no other 8k camera is as robust when it comes to heat management.
Wes Peterson
Well-known member
People want their cake and to eat it too.... even when that means defying physics. Nikon released the Z9 at $1000 under every estimate and people complain its too big. They release the Z8 for those people for even less, then those people complain it isnt exactly a Z9.
I'm the one, Tom Stites, that posted some comments in that thread regarding some impromptu tests that I ran yesterday afternoon.
To recap. Recording 4k60, H.265 10-bit, SDR, to either 1TB Angelbird AV Pro SE or 128GB Ritz Gear SDXC II, VideoPro, V90. Ambient temps were consistent indoors at 69.5 degrees.
I got 22 minutes before shutdown with both CFe and SD cards in the body. I was surprised to get 50% longer run time before overheating and shutdown if I removed one of the memory cards in my Z8. When recording to a V90 SD card, no CFe card in the camera, I got 32 minutes of recording and never a hot card warning, just camera temp and eventual shutdown. With just the CFe card in the camera, I got a hot card warning, then a camera hot warning and then eventual shutdown at 34 minutes.
Recording at 4k30 with either of the cards does not seem to be a problem with either of the cards, whether or not they are both in the camera at the ambient temps I tested in. I'll likely do some tests over the next few days with regards to some other formats. At some point, I intend to do some more controlled power requirement testing to see which dodecs and card combinations draw the most power when recording. Some preliminary testing shows a definite difference, as one might expect, when you have one or two cards in the body or shoot at higher resolutions and/or frame rates. To do this, I power the camera via USB and see an instantaneous, though fluctuating, power reading and I also get a WH and mAH reading over time. I'll use the latter over a fixed recording time to get around the rapidly fluctuating instantaneous readings.
Cheers!
Wes Peterson
Well-known member
Those angelbird cards seem to be one of the hottest running cards available as evident in this thread
THREAD
Wes,
I don't have any other cards to compare to, but my experience in a wide variety of usages does not seem to bear that out...whether in a camera body or in either of the card readers that I own...one Angelbird reader and one Delkin reader. All my cards are running the latest firmware from Angelbird and I recall that of the upgrades had to do with power management.
In the case of my testing yesterday, at the end of the 34 minute test, the card temp when I removed it was 105F (40.5C) which I don't think can be considered a cause for alarm. I have their cards in 160GB, 512GB and 1TB varieties and I've never had issues in the Z9 or Z8 with a shutdown caused by card temps, only body temps and even those occurrances were to be expected due to ambient or the format I was using in the Z8...never an issue in the Z9.
I'm measuring temps with a Fluke IR Thermometer which I know to be very accurate and consistent.
Update: Just ran a test with my 1TB card transferring a 90GB video file from SSD in my desktop PC to the 1TB card in the Angelbird reader. 675MB/s transfer rate via USB-C Gen2 2x2. Ambient air temp 70.5F, card reader sitting on the top of my desktop PC case which reads 80F. Card temp at the end of the 2+ minutes it took to transfer was 85.5F. Card reader case temp with the card removed and after the 5+ minutes it's taken to type this update is 81F. Card is back to ambient temp.
Same test just now on the 512GB card and ending card temp was 89.4F, so a little warmer than the 1TB card. Transfer rate was slightly slower at 645MB/s
Granted, these are 2 minute write tests and the cards will likely heat up further over time, but I don't have the time right now to run full card tests, but I will soon. I call BS on that test that someone ran earlier.
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