UK Caving

TECHNICAL FORUMS => Film & Photography => Topic started by: JoW on January 10, 2020, 12:36:00 pm

Title: Underwater lights for photos
Post by: JoW on January 10, 2020, 12:36:00 pm
Having sorted myself a nice bright light for photos I'm wondering what people are using for underwater lights for photos? (as in putting the light in the water to light a streamway or lake while you take a photo above it)
Title: Re: Underwater lights for photos
Post by: Pitlamp on January 10, 2020, 01:42:46 pm
I use something similar to this:

https://www.amazon.co.uk/VOLADOR-Flashlight-Rechargeable-Submersible-Battery/dp/B07RMXK1G3/ref=pd_aw_sbs_60_1/260-9523008-4834333?_encoding=UTF8&pd_rd_i=B07RMXK1G3&pd_rd_r=a72bf2ef-5a19-40f0-a0d0-7565b977452a&pd_rd_w=uysp8&pd_rd_wg=2hvOX&pf_rd_p=0208d703-a674-4413-8899-c3889837d212&pf_rd_r=YS93TBY2S5BA9A5K5QWW&psc=1&refRID=YS93TBY2S5BA9A5K5QWW

. . . but with a bit of thin white polythene bag stretched over the bezel & secured with elastic bands, which spreads the light evenly.

I'm considering buying this, to be used in a similar fashion:

https://www.amazon.co.uk/Diving-Flashlight-Underwater-Submersible-Outdoor/dp/B07G42CY9T/ref=pd_aw_sbs_60_4/260-9523008-4834333?_encoding=UTF8&pd_rd_i=B07G42CY9T&pd_rd_r=a72bf2ef-5a19-40f0-a0d0-7565b977452a&pd_rd_w=uysp8&pd_rd_wg=2hvOX&pf_rd_p=0208d703-a674-4413-8899-c3889837d212&pf_rd_r=YS93TBY2S5BA9A5K5QWW&psc=1&refRID=YS93TBY2S5BA9A5K5QWW

Disclaimer - I'm not very good at photography; others may well give you better answers!
Title: Re: Underwater lights for photos
Post by: Pitlamp on January 10, 2020, 01:48:02 pm
This also loos like it might be effective - and it's cheap enough for a punt:

https://www.amazon.co.uk/dp/B07BCC4VQW/ref=psdc_1104442_t1_B07C2VN39R
Title: Re: Underwater lights for photos
Post by: Steve Clark on January 10, 2020, 05:44:56 pm
Those ‘18000’ lumen ones on amazon are good value and take standard 18650 cells. I’ve seen them used for underwater cave & wreck photogrammetry and they do the job. Very bright, similar to £1000+ video lights, but £50. Not 100% reliable. I think some failed out of a batch of 6 or 8. They are not suitable for use out of the water. Insufficient heat sink and get way too hot.
Title: Re: Underwater lights for photos
Post by: Pitlamp on January 10, 2020, 07:00:43 pm
Thanks Steve - all that's useful to be aware of.
Title: Re: Underwater lights for photos
Post by: JoW on January 13, 2020, 01:25:15 am
Thanks! I'll have a look and see what I can get. Though I'm wondering if it would worth spending slightly more and getting something that I can use for other things too.
Title: Re: Underwater lights for photos
Post by: JoshW on January 13, 2020, 10:45:07 am
Thanks! I'll have a look and see what I can get. Though I'm wondering if it would worth spending slightly more and getting something that I can use for other things too.

I’ve used a mini q40 with a custom duo insert on occasions and it’s done the job, probably 50 all in..
Title: Re: Underwater lights for photos
Post by: Duncan Price on January 13, 2020, 02:50:29 pm
This also loos like it might be effective - and it's cheap enough for a punt:

https://www.amazon.co.uk/dp/B07BCC4VQW/ref=psdc_1104442_t1_B07C2VN39R

I've got three of the three LED ones like this and they are adequate video lights.
Title: Re: Underwater lights for photos
Post by: Tseralo on January 13, 2020, 10:02:56 pm
Ive got 2 of the CD-SF3 'diving light' from http://www.customduo.co.uk/Caving-Torches/. Ive taken them to 20m and they were fine so should be good for your purpose and they take 18650's which most cavers have already.