Recent Posts

91

Chronos User Discussion / Re: NEW: Chronos 4K12 and Chronos Q12

« Last post by hummingbirdography on December 08, 2023, 12:49:36 PM »

Thanks Sanjay! Is there a reason why the 1.4 and 2.1 can't allow for adjustable bit depth? Is it a sensor thing?

The bit depth limitations are dictated by the sensor. Both the Chronos 1.4 & Chronos 2.1 image sensors only provide 12-bit analog to digital converters:

Chronos 1.4: https://www.luxima.com/product_briefs/LUX1310.html
Chronos 2.1: https://www.luxima.com/product_briefs/LUX2100.html

The Chronos 4K12 uses a GSprint 4510 image sensor, which provides support for 12, 10, and 8 bits per pixel

https://gpixel.com/en/pro_details_1191.html

92

Chronos User Discussion / Re: Gated burst not working from external trigger

« Last post by bostonscot on December 08, 2023, 12:49:30 PM »

update.  I can apparently generate a trigger that starts something recording.  Using the API I can see the number of entries in "videosegments" increasing, but only rarely does this include more than one frame per segment, and often it will spontanteously drop to one or two entries.  On the GUI I can see "recording" active, but at no point does this seem to lead to contiguous video from multiple button press.  It is in gated burst mode.  Can anyone send settings that work for them? 

93

Chronos User Discussion / Re: OLPF filter for Chronos cameras to reduce Aliasing/Moire?

« Last post by B.H.V on December 08, 2023, 08:43:27 AM »

I feel your pain with the filter juggling act. Been messing with external filters on my setup too. It's a hassle swapping them out for different focal lengths, right? Your shots look solid, though. I've been eyeing the Chronos 4K12 myself, but you're right.

Nice Moonlight! Are you using Caprock filters? I want to try out the Q12 because the squarish sensor would pair very well with my anamorphic gear. It looks like tho it isn't as popular as only one Q12 has sold so far from what I've seen on the order page. Also, I found that VEAI upscaling doesn't do so well with unreadable fine texts and makes it alias more. I hope VEAI will create a model to keep the texts as is even if it's not readable. I try to avoid having fine print lettering in my shots.

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Chronos User Discussion / Re: Has anyone tried this lens ?

« Last post by B.H.V on December 08, 2023, 08:09:52 AM »

I haven't tried that exact lens, but I've used other Laowa lenses, and they're usually pretty solid. The f/0.95 aperture sounds like a dream for low light. If you're into fast lenses, I'd say give it a shot.

Moonlight do you have any sample videos you shot with other Laowas wide open? I have a Meike 35 0.95 and it's decently sharp wide open on mid to long distances. It struggles for very close up shots though.

95

Chronos User Discussion / Re: NEW: Chronos 4K12 and Chronos Q12

« Last post by B.H.V on December 08, 2023, 08:07:47 AM »

Thanks Sanjay! Is there a reason why the 1.4 and 2.1 can't allow for adjustable bit depth? Is it a sensor thing?

96

Chronos User Discussion / Re: Chronos 1.4 and 2.1 lowering bit depth to increase frame rates?

« Last post by B.H.V on December 08, 2023, 08:06:30 AM »

I've been digging into this bit depth upgrade thing. From what I've gathered, a firmware update for the 1.4 and 2.1 to boost frame rate sounds awesome, but unfortunately, it doesn't seem like it's in the cards. I wish they could pull it off, but as of now, it looks like it's a feature exclusive to the new models.

Yeah, Sanjay already got back to me and said it's not possible. : ( I'm hoping they at least can bring out an HDR or log profile for the 1.4 and 2.1 to get better highlight and shadow detail. If I recall correctly it was supposed to be planned in the early days of the 1.4 release but it was scrapped for some reason.

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Chronos User Discussion / Re: Frame straddling for PIV

« Last post by moonlight on December 08, 2023, 06:22:37 AM »

Getting that download time is crucial, especially for high-speed flows. I'd recommend checking the user manual or reaching out to the manufacturer directly.

98

Chronos User Discussion / Re: Has anyone tried this lens ?

« Last post by moonlight on December 08, 2023, 06:21:41 AM »

 I haven't tried that exact lens, but I've used other Laowa lenses, and they're usually pretty solid. The f/0.95 aperture sounds like a dream for low light. If you're into fast lenses, I'd say give it a shot.

99

Chronos User Discussion / Re: Chronos 1.4 and 2.1 lowering bit depth to increase frame rates?

« Last post by moonlight on December 08, 2023, 06:20:44 AM »

 I've been digging into this bit depth upgrade thing. From what I've gathered, a firmware update for the 1.4 and 2.1 to boost frame rate sounds awesome, but unfortunately, it doesn't seem like it's in the cards. I wish they could pull it off, but as of now, it looks like it's a feature exclusive to the new models.

100

Chronos User Discussion / Re: Continuous saving of single frames

« Last post by moonlight on December 08, 2023, 06:20:02 AM »

Syncing with the propeller's rpm might need some tweaking, but continuous recording at 1 fps should be doable. Check the settings, and maybe play around with the triggering options. Also, make sure your smb-share setup can handle the speed.