On 5/19/2010 9:46 AM, Boris Liberman wrote:
On 5/19/2010 8:40 AM, Larry Colen wrote:
My bigma is quite satisfactory. My only complaint with it is bokeh.
My 20/1.8 is a mixed bag. Optically it is just fine. It just fails in
the tactile department, though it seems to be better since I sent it
back, it just feels like a modern cheap lens. Then again, in today's
market people who manually focus are definitely in the minority. I also
wish that the focus were a little slower between 2m and infinity.
There's not much room for error photographing someone 3m away.
Larry, I am thinking that you were slightly confused. I did not write
anything regarding my dislike of Sigma. It was Godfrey who did.
I probably just trimmed the wrong bits of the email. It's a good thing
that I'm not a mohel.
Nonetheless, I am thinking that 20 mm lens ought to have very short
transition between 2m and infinity. E.g. my FA 20/2.8 has just a few
degrees of rotation between 2m and infinity mark. In fact, 2m is the
last focus mark before infinity, which I believe says something.
This is true. Since the lens goes from, IIRC, a 1:2 macro to infinity
without any sort of a focus stop, the focus is better on speed than it
is on accuracy. If they slowed it down a bit it would be a lot easier to
manually focus. Even if they just slowed down the manual focus and left
the high gear ratio of the auto focus screw.
Like I said before, things such as Katz Eye f.s. help immensely if one
has to deal with manual focus.
I've been using them for two years.
Personally I had owned only two Sigma lenses and the were satisfactory.
They were not stellar but they did the job they were supposed to do and
did it quite fine. I did not own any EX series lenses, though.
That's a very good description of them. They do a decent job at what
they're intended, and have good performance for the money. I'd love to
have their 30/1.4 in my kit for low light indoor work.
Sigma seems to do a good job of spec'ing lenses to my needs, at a price
that I can consider affording.
Boris
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