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[photo-3d] Re: FED and Hyperfocal distance


  • From: "Chuck Holzner" <cfholzner@xxxxxxxx>
  • Subject: [photo-3d] Re: FED and Hyperfocal distance
  • Date: Mon, 04 Sep 2000 04:55:49 -0000

--- In photo-3d@xxxxxxxxxxx, Eddie Bowers <eddieb@xxxx> wrote:
> I recently got a FED-M and overall it works very well. The only 
thing that
> is a pain is that I can not determine the hyperfocal distance 
because I
> never know what aperture is being used.
> Does anyone have a chart or something that would show what aperture 
(and
> shutter speed) it chooses for given lighting conditions?
> 
> -Eddie
> http://users.ticnet.com/view-master/



I have a FED BOY and would like the same information.  I would think 
that the M and the BOY worked the same on automatic but of course 
don't know for sure.

I did a test to try to find out something myself on this:  
I set the ASA on 100 and with the back off and the camera outside on 
a sunny day, I triped the shutter, and looking through a lens, 
observed the size of the aperture.  I then compared the remembered 
size to several sizes I got while setting the aperture manually.  (I 
did this several times) It looked like F11 to me.  I figure on ASA 
100 in the sun it is F11 @ 1/200.  Pointing the camera toward less 
light I got the same F stop.
I assumed that it was keeping the same F stop and adjusting the speed 
for light conditions.  
I changed the ASA to 50 and tested again.  The F stop opened up to 
what looked like F8 and stayed there for different light levels.  
I moved to ASA 400 and the aperture got smaller then F11.
I didn't test it for greatly reduced light to find out when it would 
start opening up the aperture, but plan to when I finish off the roll 
I started after doing this short test.
I know this doesn't answer your question but it is a start.

Chuck