No need to work out the GN, as this page does it for you. Sort of.
http://www.flashbulbs.com/meggaflash/pf300.html
Note that the PF330 is a long-burn version of this PF300, for which GN at
ISO100 of about 500 (feet, not metres!) is quoted. PF330 has same output of
10MWS, but 140000 lumen seconds (while PF300 _only_ manages 110000) but that
is no doubt due to the relatively long duration.
I had better fetch my Ray-Bans...
Piers
-----Original Message-----
From: usher99@xxxxxxx [mailto:usher99@xxxxxxx]
Sent: 20 February 2014 00:07
To: olympus@xxxxxxxxxxxxxxxxx
Subject: [OM] FL-600R
Dr. Flash writes
>>In fact, Dr. Flash has joined the no flash club... for most things.
>>It's very difficult to light the Everglades or the Grand Canyon with
>>flash. :-)
You probably can light the Everglades reasonable well with these guys:---see
the faster burning ones uses to light the river and train:
http://www.meggaflash.com/gallery?AG_MK=0&AG_form_paginInitPages_1=1&AG_form
_albumInitFolders_1=/gallery2&AG_form_scrollTop=0&AG_form_scrollLeft=0&AG_MK
=0
http://www.meggaflash.com/meggaflash-bulbs/photoflash-bulbs-pf200-meggaflash
-technologies
If nothing is moving then look at these guys:
http://www.meggaflash.com/meggaflash-bulbs/pf330-flashbulb
140,000 lumen-seconds. Not sure how to convert to w-s or GN. Would be
shutter speed dependent of course and illuminates much much larger area.
Reflector size matters as well. I bet Tim or Dr. Flash could give an
estimate.
Beam angle relevant, steradians and other such stuff that haven't thought
about in many moons.
OM-2 and 2N have FP flash sync to let the Flashbulbs get up to power--ignite
them about 20 msec prior to first curtain, IIRC. Last time I used a couple
had to stop down so much had to worry about offending Dr. Diffraction as
well as temporary blindness of the guests.
Fan of Dr. Flash and Dr. No Flash, Mike
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|