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Author Topic: Light meter
Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 02-14-2014 09:50 AM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
Here's what I received from Sekonic on the matter of integration time and possible firmware option:

---
Dear Mr. or Ms. Carsten Kurz,

Thank you for your inquiry about L-558CINE.
I am Minoru Oda(Mr) from Sales Operation Sec.
of light meter in Sekonic Corporation in Japan.

The measuring period of luminance measurement of L-558CINE is 33 msec.
Therefore, if there is 48Hz flicker in your measurement, measurement value is affected by this flicker.
And unfortunately, L-558CINE do not have a longer integration time function and any other special update.

Please kindly use it by measuring several times and averaging them.

If you have any question, please kindly let us know.

Sincerely yours,

Minoru Oda
Sales Operation Sec.
---

So, Pete, if you can try to find out about your L-558 Cine...

- Carsten

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Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99


 - posted 02-14-2014 10:37 AM      Profile for Gordon McLeod   Email Gordon McLeod   Send New Private Message       Edit/Delete Post 
The GT projector is a twin rotor design using 2 15K watercooled lamps for 3d with the advantage of two lens very close togather to minimize the 3d distortion
The "classic" was available as a 15K water cooled or a originally 4K later 7K aircooled machine
Later the SR machine which was also aircooled but with a small rotor and then the imfamous MPX machines

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Pete Naples
Phenomenal Film Handler

Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001


 - posted 02-18-2014 03:19 PM      Profile for Pete Naples   Email Pete Naples   Send New Private Message       Edit/Delete Post 
Oddly enough I just dug it out and put batteries in it. Still works, still gives readings very close to my SpecBos

It's a re-badged Sekonic, sold as 'MRL LightSpot'. Peel the stickers back and it's a Sekonic underneath. I'd wager MRL were the people who modified it. Certainly it's not any kind of official Sekonic modification.

Given that this model is long obsolete and that the company I bought it from here in the UK are no more (I last had it calibrated in 1999 [Roll Eyes] ). I think we're on to a non-starter for the OP.

Looking at the prices of new Sekonic meters, issues of integration time aside, the price of the Harkness gadget really isn't bad at all.

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Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 02-18-2014 03:41 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
You are right, official retail prices do not make a big difference between current Sekonic spotmeters and the Harkness screen checker. I was hoping there would just be a hidden config menu in the Cine model to enable a longer integration time. Maybe MRL commissioned a batch of modified 558 cine models for their clients or technicians.

The 558 cine is still a very nice spot meter and you can get it for modest prices on ebay. Actually it's no problem to use them on digital screens.

- Carsten

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Pete Naples
Phenomenal Film Handler

Posts: 1565
From: Dunfermline, Scotland
Registered: Feb 2001


 - posted 02-19-2014 10:56 AM      Profile for Pete Naples   Email Pete Naples   Send New Private Message       Edit/Delete Post 
I used to use it on digital & film screens, as the early software for the SpecBos didn't give Fl readings!

Once the Jeti software was updated to give x,y +Fl, I stopped using the spotmeter, although a colleague used it for a time for Technicolour 3D installations.

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Ivan Plamondon
Film Handler

Posts: 42
From: Welland, Ontario, Canada
Registered: May 2013


 - posted 02-24-2014 02:07 PM      Profile for Ivan Plamondon   Email Ivan Plamondon   Send New Private Message       Edit/Delete Post 
Gordon, you are describing the 3D version of the GT projector. Ours here at Niagara Falls is a 2D version GT projector with a SINGLE rotor and a converted 7kW lamphouse (horizontal placement). It was originally a 4.5 kw lamphouse.

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