Olympus-OM
[Top] [All Lists]

[OM] Re: Lighting an airship? was Re: Re: Flash for E500

Subject: [OM] Re: Lighting an airship? was Re: Re: Flash for E500
From: usher99@xxxxxxx
Date: Sat, 17 Nov 2007 22:34:57 -0500
Thanks everyone for the comments.? 
Mike






Ok, thanks.  Power storage capacity vs. what gets delivered to the 
subject 10 feet away.

Chuck Norcutt

Tim Hughes wrote:
>>> how do you know that<<
> Chuck,
>       From calculation, knowing the voltage and capacitance.
> 
> There are some very old threads where I listed a comparison of relative 
> efficiency in a range of
> common Sunpak ,oly,metz etc flashes with compared normalised GN's, normalised 
> for nominal areal
> coverage and energy. To do it properly you would need to integarate light 
> output with an
> integrating sphere to get BCPS etc rather than rely on assumed similar light 
> pattern uniformity
> from different flash vendors. 
> 
> T20's are a lot less efficient than T32's.  
> 
> Tim Hughes
> 
> --- Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> 
>> Thanks and how do you know that?
>>
>> Dr. Flash
>>
>> Tim Hughes wrote:
>>> Chuck,
>>>        The T32's are actually 70J. 
>>> Studio units tend to waste the light produced a bit more (reflectors less 
>>> effective) and also
>> with
>>> larger tubes the lamp conversion efficiency is a little lower.
>>>
>>> Tim Hughes


________________________________________________________________________
Email and AIM finally together. You've gotta check out free AOL Mail! - 
http://mail.aol.com


==============================================
List usage info:     http://www.zuikoholic.com
List nannies:        olympusadmin@xxxxxxxxxx
==============================================

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz