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Re: [OM] Is OMZ 50 1.4 (high sn) shaper stopped down than 50 1.2? --Caut

Subject: Re: [OM] Is OMZ 50 1.4 (high sn) shaper stopped down than 50 1.2? --Caution, on topic.
From: Moose <olymoose@xxxxxxxxx>
Date: Wed, 12 May 2021 12:37:25 -0700
On 5/10/2021 2:59 PM, Mike Gordon via olympus wrote:
Looks like Roger at Lensrentals is no longer a hidden font of knowledge 
requiring  going to his website at Lensrentals or blog-- now has a deserved 
wide audience even if  in general don't exactly find the current forum where 
they posted his article optimal.

The recent installment is quite interesting about 50mm lenses and contains a 
bit of a history lesson.


As the Zuiko 50's are indeed double gauss-ish, his comments apply.


As he mentions many aberrations don't improve all that much stopping down such 
as 3rd and 5th order astigmatism, elliptical coma and others.


This results in 50mm double gauss  lenses of this era  with odd situation that 
a cheaper  slower 50mm can outperform the expensive 50/1.2 stopped down.

The thing left out is how the lens performs in use in ways other than resolution. Not that I expect him to cover everything, but more than resolution is at play in choosing lenses.

This is a problem with all Double Gauss and DG derived 50 mm-ish lenses I know of. <http://www.moosemystic.net/Gallery/tech/Bokeh/5018bokeh.htm>

The degree to which bokeh is ugly varies with focal plane and back ground distances. Closish both is usually OK. Close subject and distant background can produce dark centered bright rings almost worthy of a mirror lens.

The 50/3.5 is obviously DG derived and as bad or worse than the 50/1.8s in this regard. Wonderful C-U lens. Shoot an ant on a flower, with back ground 30 ft. away, and the bokeh is awful.

<. . .>

More 50's than know what to do with, Mike

On 5/11/2021 8:31 PM, Wayne Shumaker wrote:
<. . . >
And still learning how to compose with a 50mm. I find that difficult to do well.

I am bemused at this kind of idea. I can't figure out why I should learn to work around the limitations of a specific focal length. I prefer to see a subject, then choose FL for the framing, perspective, etc. that I want.

Esthetics over asceticism!

A. O. V. Moose

What if the Hokey Pokey *IS* what it's all about?
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