On 2/9/2023 1:44 PM, Mike Gordon via olympus wrote:
Come closer Moose writes:
<<<<but as expected the
<<<working distance is a bit tight. Close focusing distance in S macro mode
(odd ball switch
<<<which moves lens elements and lose max aperture goes to F5 or F5.6, (reviews
<<<is 8.8 " with working distance 2.5." (2:1 magnification). Working distance
That's weird. Just set 60/2.8 to 1:1, and working distance is ~3.25 in.
Yes, it is weird. Pulled those numbers from reviews--not clear if the "S
macro" switch was engaged--suspect much shorter FL with that switch set. People
describe hearing lens elements moving around. It seems the 1:1 setting on the 60 mm
must be true 1:1 mag
and not FF equivalent, i.e image produced is really at 1:2.
Which image?. The reproduction ratio, which comes from the cameras used in making printing plates, is literal, not
relative. A contact print is 1:1, whether 8x10" or half frame.
The "Eq" Oly mentions deals with the relative sensor sizes. Shoot a 2 Peso Mexican antique coin, which happens to be 12
mm, @ 1:1 on FF, and the coin will fill half the height of the sensor. Shoot it @ 1:1 on µ4/3, and is will fill 92 % of
the height of the sensor.
Printed on 4x5 paper, the coin from the smaller sensor will be almost twice the size of thee FF print. Ignoring the
format shape difference, 1:1 on µ4/3 is the equivalent of 2:1 from a FF sensor.
The nomenclature is confusing and Oly didn't make it any better by often citing
the FF equivalent magnification but the image is a crop.
See above. "i.e image produced on the sensor is really 1:1, while the image printed, or on screen, at a different
magnification or dpi, is really at 1:2. "
Relative Ratio Moose
What if the Hokey Pokey *IS* what it's all about?
Themed Olympus Photo Exhibition: http://www.tope.nl/