After Godfrey set me right I made another set
of images -- like I did a week or so ago
(without making a silly mistake) when testing
a Macro Converter. This time I used the Sigma
50/2.8 EX Macro alone. The nearest flower was
110 mm from the front edge of the lens mount
and the furthermost was 330mm. This makes the
depth of focus 220mm. I used CombineZ 5 this
time to stack 21 images. The aperture was 3.5
and exposure 150s using the Vivitar TTL
730AFPK flash pointed up with a white card
reflector at 45 degrees or so.
The picture is here:
http://www.kolumbus.fi/mimosa/HOLD/cz-002.jpg
I can't see any difference in sharpness
between this picture and the previous one.
And conclude that the Macro converter does
not mess up resolution so you would notice --
with this kind of subject anyway.
Now I'm going to bed.
Don
--
Dr E D F Williams
__________________________________
http://www.kolumbus.fi/mimosa/index.htm
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Added Print Gallery - 16 11 2005
