--- Rob Chandler <[EMAIL PROTECTED]> wrote:

> properly with was my Rebel 2000 (film). It wouldn't
> focus properly with 
> my Elan 7e or 7ne which were bought a few years
> later. The lens went 

For some reason this lens gets a very bad rap most of
the time, esp. from DSLR users. 

I have this lens and use it without any problems.
Perhaps in low light/contrast it will not be able to,
unassisted, pass enough light through for the body to
be able to determine focus. But that is to be
expected, a characteristic of this lens - it is not a
"wide open" lens - that fact is well established
before one buys it.

So then what does "would not focus properly" mean ?
Not attain Focus Lock/Hunt ? Or does it mean it focus
lock is achieved even without the subject being in
focus ? I thought it was the camera body that decides
what the correct focus is - not the lens (the lens is
just moved back and forth until focus is determined to
be achieved by the body's algorithm). As long as there
is enough light getting to the sensor in the body
(behind the lens, but not in it), focus should be
achieveable . If not, the body/algorithm is at fault,
certainly not the lens. 

Keep in mind many bodies will take the shot even
without focus lock, such as during predictive focus or
Servo mode etc.

Just curious about how much is established fact and
how much is opinion really about this lens ...

- Harman





 
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