Great idea Brian. How about this for nowadays - empty Altoid mints case
(still metal) to put the critter in, then go to an electronics suppy house
and get "canned cold" - I believe this is still available, but now in a
non-CFC formulation. It is used by repair technicians to isolate electronic
component failures due to temperature (freeze the suspect component by
spraying it; if the HiFi amp starts working again, that tranistor is the
problem <g>.
Gary Edwards
----- Original Message -----
From: Brian P. Huber <bphuber@xxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Saturday, August 26, 2000 10:16 AM
Subject: RE: [OM] Re: Need advice: 38/2.8 Macro
> Mike,
> For a nice portable reflector, take a look at the Photoflex reflectors.
> They have some that are 12" diameter, they have a nice rim that makes them
> open totally flat. They twist up and fold into a 5" bag. They can be
> obtained in white, gold, gold/white combo and translucent. I got mine at
> Midwest Photo for $12 each.
>
> Back when you could still get it, I used to buy DustOff (freon). This
will
> REALLY DATE ME- but I used aluminum film cans in conjunction with the
> DustOff. I would pick up the insect, place it in the aluminum film can
> (for good heat transfer), tun the DustOff can upside down and blast the
can
> with cold air. The insect would slow down enough due to the cold that
> photography was quite easy with my 50 3.5 macro.
>
> Can't easily find freon versions of DustOff any more and aluminum film
cans
> have been gone for 15 years!
>
> The tele extension tube would only alleviate the closeness issue, motion
> would still be a problem.
>
> The issue you have with light loss through the tubes you have will
> essentially hold true across the board. Even if they are Cambron. 30.5
> opening is pretty small, but the extension is the issue. Yes, I know, the
> opening should be larger, but ...
>
>
> Brian P. Huber
>
> Troy, OH
> bphuber@xxxxxxxxxx
>
>
> Robert my ext. tubes are generic Cambron branded gizmos in sizes 13mm,20mm
> and 27mm. They're dark. Very dark. The interior opening is 30.5mm and on
> the 27mm ext tube that translates to a 2 stop loss. Stacking them for more
> extention pretty much stops me right out of many lighting situations.
> To augment the natural lighting I've taken to using a reflective screen
> meant to keep sunlight out of a car's windshield. I've also experimented
> with a mylar space blanket (highly compact, but too flimsy) and a section
> of poster board with a cutout to stick the lens through. (a po'boys ring
> reflector,.. sorta)
>
> The other thing I don't like about the rings is that focal distance
becomes
> so critical that merely setting up the shot becomes tedious. Trying to get
> moving bugs or flowers in even the slightest of barely perceptable breezes
> becomes really frustrating. I suspect that's the case with many macro
> setups. I'm unclear on whether the tele. ext. tube would alleviate some of
> that. (Seems like it might.)
>
> Thanks to all who responded!!
>
> Mike Swaim
>
>
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