RE: Autoexposure Follies?

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

On 14 Jul 98 at 20:16, J.Wood wrote:

> At 02:21 PM 7/14/98 -0700, you wrote:
> 
> >I do wish someone made an affordable IR exposure meter...
> >
> Theo, have you looked at the recommendation by Andrew Davidhazy (RIT).  He
> suggests covering your hand held meter's cell with the same material you
> are using to filter your camera.  I don't remmember which IR site has it(I
> lost my addresses several months ago in a tragic crash},  but for using an
> 87c filter he suggests using a piece of the same material over the light
> opening on a Gossen Luno Pro and exposing at EI 2400 for HIE.  I have tried
> it with my inexpensive Gossen Super Pilot and it works.  Just cut a small
> piece of gelatin or polyester and slip it in the front.  I use EI 3200
> because I have been using T-Max developer.  This is intended for use with
> an 87c filter mounted behind the shutter so you can use your SLR hand held.
>  It should be able to work with any filter material you want.  

I believe the Gossen Sixtomat Digital is the same as the Luna Pro, 
right? (with the Digital F / Pro F being the very latest addition to 
the line).
In that case I'd like to confuse things even more by claiming good 
results with the meter set to 400 ASA....in that case it is 'spot on' 
with my typical bracket range of 1/60s @ f5.6-f11 on a bright sunny 
day....
This default setting also makes a separate light meter completely 
redundant....I have not used one with my all-mechanical Horizon 202 
panorama camera since the very first session....8-))
And even my EOS-1 is stuck on 1/250-1/1000 @ f2.8 when I use my 
200mm....

One of the few occassions you really *need* this filter-calibrated
light meter is *under* foliage, as the relation visible/IR goes
completely haywire....IR remains virtually unchanged, while visible
drops several stops.

IMNSHO you should completely forget about light meters, use a fixed
type of bracket, and develope a 7th (common) sense for the amount of
light, visible vs IR. It saves you a *lot* of hassle in the long
run, and therefore you can take more pictures instead of setting
things up.

Of course, fooling around with a light meter makes you an instant-pro 
for other people....luckily I then pull out my panorama camera, which 
people refuse to rate as professional....it simply doesn't 
look like an SLR, neither 35mm nor medium format....:-))


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


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