Albert,
As you probably know, most lenses have their maximum sharpness in the
midrange of aperture. Choosing one extreme or the other is a compromise for
purpose. In your example, your purpose was to shoot a longer exposure, so
the gain of that capability in the circumstance was worth it. To maintain
sharpness, you could choose a slower film and use ND filters. Although the
addition of filters presents its own compromise, setting the lens in its
sweet spot makes it the better choice.
I don't know how you can compare a 28 to a 24. I don't find themto be
interchangable, regardless of the DOF. Their angles of view are quite
different. If you are interested in the DOF, check the charts for each lens.
In use, I've found the Zuiko 24/2.8 to be very sharp and generous with DOF.
-Mickey
----- Original Message -----
From: "Albert" <olympus@xxxxxxxxxxx>
To: "Olympus List" <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, July 06, 2003 9:24 AM
Subject: [OM] Anybody shoot at F22?
> Today, I took a trip to the hot springs, and took a few pictures there,
> followed by a few pictures at a very big and famous temple in Taiwan.
>
> There was a small waterfall, and I wanted to take a good shot of it, and
> so I shot it at F22 with a Polarizer on it, at about 1/8th of a second.
>
> This is the first time I've shot at F22. Eager to see the results..
>
> I'm bidding on a 24mm F2.8, and I just noticed that it only goes down to
> F16 as compared to my 28mm, which goes down to F22. Am I really losing
> that much, or no?
>
> Most math tells me that F22's quality is not very good.. I'm wondering
> if the DOF difference is that big between F16 and F22 that I'm really
> missing out, or not by much.
>
> Also, I'm wondering... if F16 on a 24mm is pretty much close to F22 on
> a 28mm.
>
> Albert
>
>
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