Re: Weddings & IR flash

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 17 Aug 96 at 23:46, Robert Long wrote:

> On Sat, 17 Aug 1996 09:02:29 +0100, Willem-Jan Markerink wrote:
> 
> |It just occurred to me that IR flash (flash covered with opaque IR 
> |filter) can be a nice solution to avoid the obtrusive indoor flashing 
> 
> I trust that modern flash tubes can be relied on to deliver
> significant energy at the appropriate wavelengths.  Your use of flash
> at the recent wedding seems to have confirmed that, but I wonder
> whether flash units vary in this respect.  Certainly it's not a
> specification that many flash purchasers are likely to have inquired
> about!

Yeah, I wondered about that too. 
Keep in mind I only used a Wratten #70, you might run off the visible 
'curve' quickly with opaque filters.
I am not sure though about spectral inconsistencies compared to 
outdoors....I *think* a flash bulb can be regarded a an ordinary 
black body light source, with a continuous spectrum to either side 
(both UV & IR).
The Schwarzschildt effect might be responsible for more 
inconsistencies than the flash itself....
--
Bye,

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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 9