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Re: [OM] Question: Mirror and aperture pre-fire?

Subject: Re: [OM] Question: Mirror and aperture pre-fire?
From: Dawid Loubser <dawidl@xxxxxxxxxxx>
Date: Wed, 12 Aug 2009 15:10:42 +0200
I think this whole discussion on aperture pre-fire and mirror lockup
is specifically for static subjects with a tripod-mounted camera - a
setup which is inherently quite prone to harmonic (and otherwise)  
vibration,
also because the OM cameras and lenses are so light.

Hand-holding, or using a tele lens laid down on a beanbag, I have  
*never* seen
these supposed evil aperture vibrations in one of my images - they are  
all absorbed
by the much heavier and well-damped object (e.g. human) holding the  
camera.

I have never had a single shot which I though "hmm, if only my OM-1  
didn't
vibrate so much". Yet, an OM-1 (vibrations and all) with ISO 100 film  
demonstrably
out-resolves an Olympus E-3 with a similar lens, e.g. 90/2.0 Macro on  
the OM-1,
ZD 50/2.0 macro on the E-3.

So, though this problem theoretically exists, I have never ever found  
it to be any
sort of problem in my shooting, or in 16x20 optical prints.

I personally think, for your uses, a pair of OM-1's are still the  
best. They are
cheap and plentiful, and last forever.

Just my 2c,
Dawid

On 12 Aug 2009, at 2:28 PM, DrT (George Themelis) wrote:
> Thinking about it a bit further, M&A Prefire is very restrictive.   
> For a 2d
> photographer it practically excludes action and wildlife  
> photography, two of
> the main reasons to use telephoto lenses.  Mainly static subjects  
> can be
> photographed with this technique.


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