From: Mike Warren on
Rita � Berkowitz wrote:

> Julian Vrieslander wrote:
>
> > > inexpensive solution that adds a new dimension in lighting to all
> > > your pictures. Get yours today.
> >
> > These things are dangerous. If you shoot a long sequence with a
> > short recycle time, the photon pressure can build up inside the
> > bottle and cause it to explode.
>
> Yeah, I heard about that! It is not a problem till it gets "spikey"
> and you start having "transmission" problems. I have installed a
> silver clad copper heat pipe with a beryllium oxide relief valve for
> added protection.

What a load of rubbish! All you have to do is poke 3 or 4 small holes
in it.

--
-Mike

--
Posted via a free Usenet account from http://www.teranews.com

From: Pete D on

"Mike Warren" <miwa-not-this-bit(a)or-this-csas.net.au> wrote in message
news:xn0f5dj2b9ko25004(a)free.teranews.com...
> Rita � Berkowitz wrote:
>
>> Julian Vrieslander wrote:
>>
>> > > inexpensive solution that adds a new dimension in lighting to all
>> > > your pictures. Get yours today.
>> >
>> > These things are dangerous. If you shoot a long sequence with a
>> > short recycle time, the photon pressure can build up inside the
>> > bottle and cause it to explode.
>>
>> Yeah, I heard about that! It is not a problem till it gets "spikey"
>> and you start having "transmission" problems. I have installed a
>> silver clad copper heat pipe with a beryllium oxide relief valve for
>> added protection.
>
> What a load of rubbish! All you have to do is poke 3 or 4 small holes
> in it.
>
> --
> -Mike
>

LOL, priceless!!


From: C J Campbell on
On 2007-04-24 18:29:27 -0700, "Mike Warren"
<miwa-not-this-bit(a)or-this-csas.net.au> said:

> Rita � Berkowitz wrote:
>
>> Julian Vrieslander wrote:
>>
>>>> inexpensive solution that adds a new dimension in lighting to all
>>>> your pictures. Get yours today.
>>>
>>> These things are dangerous. If you shoot a long sequence with a
>>> short recycle time, the photon pressure can build up inside the
>>> bottle and cause it to explode.
>>
>> Yeah, I heard about that! It is not a problem till it gets "spikey"
>> and you start having "transmission" problems. I have installed a
>> silver clad copper heat pipe with a beryllium oxide relief valve for
>> added protection.
>
> What a load of rubbish! All you have to do is poke 3 or 4 small holes
> in it.
>
> --
> -Mike

The Fong diffuser has the end cut off to assist with bounce flash. If
you cut off the end of the Thong diffuser, you probably would not need
the small holes in the diffuser as long as the ceiling had proper heat
dissipation. If you use the wide-angle lens on the strobe, though, a
higher percentage of the photons are striking the sides of the bottle
and you should still make some small holes.
--
Waddling Eagle
World Famous Flight Instructor

From: mark.thomas.7 on
On Apr 22, 10:46 am, Rita Ä Berkowitz <ritaberk2O04 @aol.com> wrote:
> For those interior and portraiture shooters looking for the ultimate in
> diffused lighting for your speedlight look no further, Larry Thong's
> LightBottle is here. No need to waste money on the expensive gimmicks such
> as the highly overrated Lightsphere by Gary Fong. The LightBottle is an
> inexpensive solution that adds a new dimension in lighting to all your
> pictures. Get yours today.
>
> http://www.geocities.com/ritaberk2007/lt1.htm
>
> Rita

I shall repeat my general caution (which Rita got MOST upset about on
her other duplicate thread!) - the light transmission spectrum of the
type of plastics used in these bottles will vary widely - eg take a
look at the lower graph here (although only the left end is relevant
to visible light):
http://www.asdi.com/M1001_multi-layerplastics_screen.pdf

I suggest that *before* you use this method on anything important, you
check your white balance carefully (use a white-/grey-card-set custom
balance if possible), and look at your flesh tones with a critical
eye. If in any doubt...

I make that suggestion having used this method once with a bottle that
looked very white to the eye, but it gave a strange (and difficult to
correct) blue-green tinge to the image. As you (and Rita) should
know, using light sources with non-linear spectrums (like fluorescents
which often have a nasty 'spike' or two) can be problematic, and
putting light through unknown plastics may give similar results.

Good luck!

From: Anonymous # 998792 on

"Mike Warren" <miwa-not-this-bit(a)or-this-csas.net.au> wrote in message
news:xn0f5dj2b9ko25004(a)free.teranews.com...
> Rita � Berkowitz wrote:
>
>> Julian Vrieslander wrote:
>>
>> > These things are dangerous. If you shoot a long sequence with a
>> > short recycle time, the photon pressure can build up inside the
>> > bottle and cause it to explode.

>
> What a load of rubbish! All you have to do is poke 3 or 4 small holes
> in it.
>
> --
> -Mike
>

Really?
And what of those who blindly follow the thong's advice without having a
clue of the dangers? A little late to chastise them for not having put holes
in it after they blow their eyes out, don't you think?

Mr Vrieslander had a timely warning about this potential and all you can do
is rubbish him for it. Shame on you Mike.

Julian