| Moderated by: chrisbet, |
|
||||||||
| Refracted light - Page 1 | |
| Rate Topic |
| Author | Post |
|---|
| Posted: Sun Aug 31st, 2025 22:15 |
|
1st Post |
chrisbet
|
I have noticed that if light is refracted and displays colours to the human eye it is not captured by the camera - any ideas why not? Eg - we went to see Evita at the Palladium in August and Eva's 2nd act dress was covered in sparklers - it really was stunning with every colour of the rainbow in the white spotlights but it looks this this in photos -  Click here to comment on this image.
____________________ If it is broken it was probably me .... |
||||||||
|
| |||||||||
| Posted: Mon Sep 1st, 2025 08:32 |
|
2nd Post |
jk
|
I guess it must be due to the sensor photosites either not being small enough to capture the colour or the demosaicing not translating accurately enough the information captured by the sensor.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
||||||||
|
| |||||||||
| Posted: Mon Sep 1st, 2025 09:11 |
|
3rd Post |
chrisbet
|
OK - I have a theory - maybe the high number of different coloured points at high brightness is overwhelming the photosites and thus the camera sees the points as white. If this is so then the exposure needs to be reduced dramatically - but that will lose the background - even using HDR I think the only way to capture it is to bracket exposures. Sadly I won't be able to experiment - tickets to Evita are now nearly £400 for the last week of the run!
____________________ If it is broken it was probably me .... |
||||||||
|
| |||||||||
| Posted: Mon Sep 1st, 2025 10:06 |
|
4th Post |
jk
|
chrisbet wrote:OK - I have a theory - maybe the high number of different coloured points at high brightness is overwhelming the photosites and thus the camera sees the points as white. If this is so then the exposure needs to be reduced dramatically - but that will lose the background - even using HDR I think the only way to capture it is to bracket exposures. That aligns with my thought of "the demosaicing not translating accurately enough the information captured by the sensor."
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
||||||||
|
| |||||||||
| Posted: Mon Sep 1st, 2025 17:47 |
|
5th Post |
Eric
|
I think it’s the difference between the way our eyes register “flashing lights” compared to sensors. The sensor just records overall light and colour at a certain intensity range. If the sparkle is outside that range it will just burn out that highlight. It doesn’t matter if that’s a blue, red or yellow flash…if it’s too much it will burn out to pure white. It’s analogous to overexposed sky. Doesn’t matter if it’s a blue sky, orange tinged cloud or white cloud. If they are grossly overexposed, while trying to get the rest of the image correctly exposed, they are all going to be white. Surely the only way you would record these colour flashes is if the exposure was low enough to capture the individual colour “peaks” within register…ie not climbing the right hand wall on the histogram??? I’ve never looked…..does the same happen with video??
____________________ Eric |
||||||||
|
| |||||||||
| Posted: Mon Sep 1st, 2025 18:29 |
|
6th Post |
chrisbet
|
It's worse with video - Evita curtain call Even the sparkles are smoothed out - might just as well be a plain white dress til she stops moving!
____________________ If it is broken it was probably me .... |
||||||||
|
| |||||||||
| This is topic ID = 2044 Current time is 07:25 | ||
| Nikon DSLR Forums > Light, Lighting Techniques, Strobes and LEDs Forums > Lighting > Refracted light | Top | |
Users viewing this topic |
||
Current theme is Modern editor
| A small amount of member data is captured and held in an attempt to reduce spammers and to manage users. This site also uses cookies to ensure ease of use. In order to comply with new DPR regulations you are required to agree/disagree with this process. If you do not agree then please email the Admins using info@nikondslr.uk Thank you. |
Hosted by Octarine Services
UltraBB 1.173 Copyright © 2008-2025 Data 1 Systems
Page processed in 0.0472 seconds (63% database + 37% PHP). 63 queries executed.
UltraBB 1.173 Copyright © 2008-2025 Data 1 Systems
Page processed in 0.0472 seconds (63% database + 37% PHP). 63 queries executed.