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Author Photography in caves
royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Photography in caves
Posted: 25/06/2020 15:23:45
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This was Chris at NAMHO. Worlds brightest caplamp to date, outputs up to 11,700 lumens (hope I got this right) even if it does need his personal computer on the back of his helmet to run it.



(click image to open full size image in new window)

Chris, I think this is a good pic, can email your the original if you want.

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'' as rare as a Cwmystwyth padlock''
IP: 88.108.145.254 Edited: 25/06/2020 15:24:05 by royfellows
ChrisJC

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Photography in caves
Posted: 25/06/2020 20:25:45
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11,200 lumens.

Yes please, given the lousy subject material, it's come out quite well! I wouldn't mind a copy for the Mrs to throw brick-bats at.

Chris.
IP: 45.143.120.91
pwhole

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Location: Sheffield and the Peak District

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Photography in caves
Posted: 25/06/2020 22:59:01
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Good grief, that's amazing. From the photo it appears that leaning against something most of the time might also be a pre-requisite? I bet you actually get recoil when you switch that on Blink IP: 81.174.241.13
Blober

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Photography in caves
Posted: 25/06/2020 23:38:06
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Get yourself the handheld version - https://intl-outdoor.com/led-flashlights/emisar-d18-150.html Shocked

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FILTH - Think this is a playground? Think again...
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royfellows

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Photography in caves
Posted: 26/06/2020 08:58:35
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You need to be careful with the torches in that they are actually doing what they claim.

Imolent, Nitecore and Fenix have been extensively reviewed and tested. You can actually test for lumen (the unit of luminous flux) with an instrument called an 'integrating sphere'. But they are only as accurate as their calibration, which has to be done against a known source.

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'' as rare as a Cwmystwyth padlock''
IP: 88.108.145.254
gingerlycolors

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Photography in caves
Posted: 27/06/2020 07:02:27
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I recommend using the Olympus TG5 camera for underground photography. It comes with a function called Live Composite Mode which enables you light-paint a photo and see the result on the LCD screen as you progress. Also it is difficult to over-expose with it. IP: 77.97.168.136
TwllMawr

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Photography in caves
Posted: 27/06/2020 18:11:51
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gingerlycolors wrote:

I recommend using the Olympus TG5 camera for underground photography. It comes with a function called Live Composite Mode which enables you light-paint a photo and see the result on the LCD screen as you progress. Also it is difficult to over-expose with it.


... Quite easy to over egg a shot Ive found. Depends on foreground/background contrast, area ratios and torch strength. Many a time I’ve sworn and vowed to go back to basics. Olympus keep tweeking the Camera’s firmware with each new hardware release as well, not upgrading previous one’s. Ideally borrow one and see if it does what you want. That includes bouncing off walls.

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“I do understand, but here’s an alternative I think aligns better with the real world.”
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Jim MacPherson

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Photography in caves
Posted: 27/06/2020 18:32:34
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TwllMawr wrote:

gingerlycolors wrote:

I recommend using the Olympus TG5 camera for underground photography. It comes with a function called Live Composite Mode which enables you light-paint a photo and see the result on the LCD screen as you progress. Also it is difficult to over-expose with it.


... Quite easy to over egg a shot Ive found. Depends on foreground/background contrast, area ratios and torch strength. Many a time I’ve sworn and vowed to go back to basics. Olympus keep tweeking the Camera’s firmware with each new hardware release as well, not upgrading previous one’s. Ideally borrow one and see if it does what you want. That includes bouncing off walls.


Bear in mind Olympus are giving up on the camera market, that issue will disappear presently Smile

Jim
IP: 81.154.50.60 Edited: 27/06/2020 18:45:17 by Jim MacPherson
royfellows

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Photography in caves
Posted: 27/06/2020 18:43:33
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That does surprise me as the TGX has a lot of popular support and people are turning out some good work with them.

I dont use one as its just not to my taste, possibly obvious by my talk of F stops and shutter speeds etc.

Back to basics is understandable when one looks at the work of people such as Dickie Bird whose underground photographs were taken many years ago, but which is still in demand for publications.

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'' as rare as a Cwmystwyth padlock''
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Blober

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Photography in caves
Posted: 28/06/2020 00:12:42
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royfellows wrote:

You need to be careful with the torches in that they are actually doing what they claim.

Imolent, Nitecore and Fenix have been extensively reviewed and tested. You can actually test for lumen (the unit of luminous flux) with an instrument called an 'integrating sphere'. But they are only as accurate as their calibration, which has to be done against a known source.


The fella who makes those torches is active in the torch building community. His torches are highly thought of and actually do what they say they do. They are very specialist and the output is only for a short period of time but the value for money is next to none. I've been using the Emisar D4 for awhile now, 4300 lumens from a single 18650 is rather incredible. Its a really nice floody optic and perfect for lightpainting.

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TwllMawr

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Photography in caves
Posted: 28/06/2020 12:24:32
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Blober wrote:

...I've been using the Emisar D4 for awhile now, 4300 lumens from a single 18650 is rather incredible. Its a really nice floody optic and perfect for lightpainting.


I’ve seen him in action with it... Hand burns healed by now Paul? WinkSmile

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“I do understand, but here’s an alternative I think aligns better with the real world.”
IP: 80.43.10.216 Edited: 28/06/2020 12:26:24 by TwllMawr
Blober

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Photography in caves
Posted: 28/06/2020 18:20:44
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I think one trip I did mention "Is something burning?" Realising the torch had come on in my pocket. Hot stuff!

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royfellows

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Photography in caves
Posted: 28/06/2020 18:34:46
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That identifies another issue with them as I had my DX80 come on in its carry pouch and nearly set me on fire. My own build torch has a toggle switch with a cover. Not very elegant but reliable and safe.
I think Imolent have improved the soft lock on later models.

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'' as rare as a Cwmystwyth padlock''
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Blober

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Photography in caves
Posted: 28/06/2020 18:35:35
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To be fair this one comes with a lock feature, I just neglected to turn it on LaughStupid

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Coggy

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Photography in caves
Posted: 28/06/2020 23:02:58
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I had a fancy digital SLR, now my Samsung mobile seems to take almost as good pics !

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