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Re: [OM] (OM) Re: Indecent exposure (again)

Subject: Re: [OM] (OM) Re: Indecent exposure (again)
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sat, 07 Nov 2009 15:27:40 -0500
I think you're getting yourself all worked up over a problem (fast 
moving light/subjects/etc) that is easily solved.  But before venturing 
there let's dwell a moment on manual and aperture preferred exposure.  I 
submit that manual exposure control with today's modern cameras (those 
having 1/3 stop exposure increments on shutter and aperture) is an 
easier and more straightforward way of effecting both aperture preferred 
and shutter preferred controls.

Why is that?  Consider an OM-2 which allows aperture preferred 
automation.  You select the aperture and the camera selects the shutter 
speed.  But if you don't like the camera's choice you have the option of 
  turning the exposure compensation dial.  This sort of begs the 
question about how you knew you needed to turn the exposure compensation 
dial and by how much but more on that later.  But why did there have to 
be an exposure compensation dial?  Because, on an OM-2, the shutter 
speed dial is only graduated in full stops.  I think we all know that 
the exposure compensation dial on OM cameras operates by adjusting the 
ISO which can be done in 1/3 stop increments.  But ask yourself why is 
this other "compensation" control needed.  In my book it isn't.  Why 
have a separate control whose real purpose in aperture preferred mode is 
really only to indirectly adjust the shutter speed.  Why not just adjust 
the shutter speed directly?  Well, directly adjusting the shutter speed 
in 1/3 stop increments in manual mode is exactly what you can do today 
that you couldn't do on an OM-2.  So, simpler Av and Tv modes are both 
more easily implemented by switching into manual mode instead and 
preselecting either the aperture or shutter speed to your liking and 
adjusting the opposite control to the meter's recommendation or +/- a 
bit if you think the meter's lying to you a bit.

So, how about those grab shots that take place unexpectedly and with 
little time for the poor photographer to think about exposure.  That's 
why we (going back to the OM-2s) have the P mode (program or 
professional as prefer) on the dial.  I can relate to that quite well. 
Several years ago I was covering a groom and his groomsmen preparing for 
his wedding while at his father's house not far from the church.  The 
house being rather dark inside I was shooting with a slow shutter speed, 
moderately high ISO and flash. 
<http://www.chucknorcutt.com/weddings/pict3111.htm>  Without warning to 
me, father, groom and groomsmen suddenly walked out the front door into 
full sun and started hoofing it to the church about 3 blocks away.  It 
was all I could do to gather my bags and run after them as fast as I 
could.  I was in no mood for critical thinking so simply slipped the 
camera into P mode and made this and a few other related shots 
<http://www.chucknorcutt.com/weddings/pict3166.htm>

So, let P mode handle the unexpected.  But here you do need a 
compensation setting since you're not directly controlling either 
shutter speed or aperture.  But, if you can get a good exposure in 
manual mode now it either means that the meter is telling the truth or 
you know how much the meter is lying and can adjust for that.  Whatever 
compensation tricks you already apply can also be applied in P mode. 
After studying some of your pics and their histograms you may learn that 
you can generalize as Moose does for his 5D.  When in any auto mode he 
keeps a -2/3 exposure compensation set since the 5D has a tendency to 
overexpose.

See, I don't think it's very complicated at all.  You already know how 
to do it.  You've just got to put a few of the pieces together.

Chuck Norcutt



Brian Swale wrote:
> 
> Snip a bunch of stuff from Rickard about manual operation of the camera
> Regards,
>    Rickard Nilsson
> ++++++++++++++++++++++++++++++++
> 
> Now I have a feeling somewhat akin to panic.  Yes, this configuration DOES 
> work. I'm amazed.
> 
> It requires a deliberate approach which is what I wanted and gives me full 
> control and responsibility over exposure and focus.
> 
> But what if I want (as sometimes happens to all of us, I'm sure) to grab the 
> camera and just fire off a shot or two to capture something taking place 
> unexpectedly and fast, leaving the camera to manage exposure and speed 
> control (I prefer aperture priority).
> 
> I can't do that now  ... ...
> 
> I remember AG, I think it was, writing that he had set up his camera for two 
> users with different needs.  Seems to me that I now need to have that ability 
> in the E-3, otherwise I'm hamstrung for grab-shot situations.  I don't want 
> to 
> HAVE to carry two cameras ALL the time, "just in case".
> 
> Can someone please point me to the menu area?
> 
> The manual for the E-3 is worse than obfuscating legal documents - the 
> devil is in the detail (and the consequences are not spelled out well at all).
> 
> Brian Swale. 
-- 
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