f/11 is a good choice for 35mm work unless you have a very high
resolution sensor like Bob's Nikon. Then diffraction will definitely
begin to interfere. f/11 is good for at least 12-13 MP like the Canon
5D and f/16 probably good for most 35mm films (except for light loss).
f/5.6 is probably the theoretical limit for these 16 MP 4/3 sensors but,
in the case of very limited depth of field, you need to experiment to
know if diffraction or limited depth of field is the real limitation on
image sharpness.
Chuck Norcutt
On 8/9/2014 7:26 PM, Don Holbrook wrote:
Force of habit. f11 was my standard for all bellows work. Will have to
experiment.
----- Original Message -----From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>To:
Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx>Sent: Sat, 09 Aug 2014 16:39:27
-0000 (UTC)Subject: Re: [OM] Mirrorless w/bellows
And that 2mm DoF was at f/11.. already creeping into diffraction territory for
4/3.
Chuck Norcutt
On 8/9/2014 11:54 AM, Dean Hansen wrote:> Don Holbrook recently posted:>> "http://zone-10.com/tope2/main.php?g2_itemId=14107>> Still learning the
M-1.......OM bellows w/50-3.5@11, custom wb, live view> magnify for manual focus, 2 sec delay, mayfly off front door, 1/4" body.> Not a good specimen, but
useful for this purpose.">> So I pull out my hardcover copy of Don's "Midge Magic" book and look> at Don's macro set-up on page 23: OM 2N,
bellows, the older (manual> diaphragm) 38 and 20 OM macro lenses, and two T32s. Great to see you're> trying out a new twist here, Don! Keep posting some results
for us. It> would be interesting to see what the 38 and 20 lenses can do, too. If you> look closely at the mayfly that Don shot with the M-1, you'll see that
the> DOF is--what--2 mm? Not trying to sound derogatory here, but I wonder if> the "shoot a view of a distant mountain" folks appreciate that DOF
isn't> always twenty miles or more. Nice work, Don! Keep learning, and sharing.> De
an
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