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Re: [OM] intro and question

Subject: Re: [OM] intro and question
From: Richard Schaetzl <Richard.Schaetzl@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 22 Jun 2000 23:35:50 +0200
"Brian A.M." wrote:

> * regards the shift lenses -- i've seen it written that the effective angle 
> of view increases w/ the amount of shift. (The 35mm at max is ~28, & the 24mm 
> is 18mm).  Is this a property of all shift lenses?
> 

That´s not true, the angle of view gets smaller! 

The total angle of view of the lens, of course, is constant and
comparable to an 24mm lens for the 35mm shift and to an 18mm lens for
the 24mm shift.
The camera sees only a part of the total angle of view, because the
image circle the lens projects is cropped by the film window in the
camera. So without shift, effective angle of view is comparable to 
the one of an ordinary lens of his focal length.

And why does the angle of view gets smaller with shifting the lens?

Imagine an extrem shifted lens, so the camera looks through the film
window like you would look through an window at an accute angle. As
more accute the angle of view the window converts into small slit to
look through. 
Of course the amount of shift is that small, not much change of 
angle of view happens.

> * Would the Zuiko 35mm rate highly among all shift lenses on the market? 

There was once an comparision test of shift lenses in ColorFoto. The
35mm Olympus shift proved there to be one of the better lenses.

 
> * lastly, at the risk of bringing up well-trodden turf on this list, what are 
> the listie's favouries for best lens while being *most* compact?  i'd like to 
> add a wideangle, a 35mm, and 'praps a 100mm to my kit.

The 100mm/2.8 will not disapoint you.


Regards

Richard


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