01-16-2012, 04:15 PM
Fly in the ointment: <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/unsure.gif' class='bbc_emoticon' alt=':unsure:' />
Below is a quote by Tim Kimzey "fstop" while reviewing 60 macro on http://www.amazon.com/review/R3IY2SSCCFY...=&linkCode=
"I must express why I am a little disappointed in that regard. From tests I have done so far, f/2 does not seem to come into play until around 14 feet to infinity. At focusing distances closer than 14 feet, the lens switches to f/2.2. It switches from 2.2 to 2.8 between 12-ish feet and a foot (that's not bad really, so you still have 2.8 all the way up to a foot in front of the lens). All true macros will do this to my knowledge, the physical parameters of focusing so close loses light. I was expecting this. But I absolutely think/wish the lens would stay a true f/2 in the portrait-shooting distances (3-8 feet lets say). Of course, its still a good deal faster than 2.8. But using the lens in studio settings or in manual modes or with manual flash settings, the aperture / exposure shifts could be annoying. And you are not getting the low-light usefulness of f/2 for any portrait-distance use."
<img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/huh.gif' class='bbc_emoticon' alt='
' /> really technical stuff. But all i am interested in knowing is if this lens changes the DOF characteristics also while changing the F stop as stated above. If the background blur doesn't change from a portrait perspective, i'm fine.
Will someone know about this?
Below is a quote by Tim Kimzey "fstop" while reviewing 60 macro on http://www.amazon.com/review/R3IY2SSCCFY...=&linkCode=
"I must express why I am a little disappointed in that regard. From tests I have done so far, f/2 does not seem to come into play until around 14 feet to infinity. At focusing distances closer than 14 feet, the lens switches to f/2.2. It switches from 2.2 to 2.8 between 12-ish feet and a foot (that's not bad really, so you still have 2.8 all the way up to a foot in front of the lens). All true macros will do this to my knowledge, the physical parameters of focusing so close loses light. I was expecting this. But I absolutely think/wish the lens would stay a true f/2 in the portrait-shooting distances (3-8 feet lets say). Of course, its still a good deal faster than 2.8. But using the lens in studio settings or in manual modes or with manual flash settings, the aperture / exposure shifts could be annoying. And you are not getting the low-light usefulness of f/2 for any portrait-distance use."
<img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/huh.gif' class='bbc_emoticon' alt='
' /> really technical stuff. But all i am interested in knowing is if this lens changes the DOF characteristics also while changing the F stop as stated above. If the background blur doesn't change from a portrait perspective, i'm fine.Will someone know about this?