Anyone using a Bigma 50-500..................

Patrick Genovese patrick.genovese.mt at gmail.com
Thu May 8 05:02:54 EDT 2008


To be honest I had the same concern prior to buying the lens but as it
turns out the zoom mechanism is very smooth and is well damped to
permit smooth control.. So is the AF .. it has a focus clutch for MF
that damps the af ring very nicely.  The only down side of the
extending zoom is that it shifts the balance slightly although this is
not a major concern. I found that the damping on my manfrotto 393
handles this shift in balance well enough that i can let go of the
camera/lens combo in any zoom position and the camera will stay put
where i leave it.  The lens also features a zoom lock that prevents
the lens from extending when being carried.

Bottom line ... in real life i don't find that the extending zoom is an issue.

My only peeve with the lens (and all sigma ex lenses) is that the
lovely sigma EX finish tends to scuff quite easily.

regards

Patrick

On Thu, May 8, 2008 at 9:58 AM, John Whittingham <johnw at carmel.ac.uk> wrote:
> Hi Patrick
>
>  Thanks for the reply, very much appreciated. I think the only thing putting
>  me off is the lens extending when zoomed, it's the main reason why I sold
>  the 135-400 I had. Having said that it does keep the size down when
>  transporting the lens in a camera bag.
>
>  One last question, if I may, is the zoom control overly stiff in operation?
>  (it was on the 135-400 but that isn't/wasn't an EX lens)
>
>  Regards,
>
>  John
>
>  On Thu, 8 May 2008 09:01:25 +0200, Patrick Genovese wrote
>
>
> > I have the bigma and ...
>  >
>  > >  1. Does SR work effectively?
>  > Yes but not as effectively as at the short end.. I estimate the
>  > effectiveness at the long end (above 300mm) to be around 1 -> 1 1/2
>  > stops.
>  >
>  > >  2. Is the lens type displayed correctly in the EXIF i.e. Sigma 50-500
>  EX?
>  > No ACR just says sigma
>  >
>  > >  3. Aprroximate aperture when zoomed at 300mm f/4, f/4.5, f/5.6?
>  > IIRC its somewhere around 5.6
>  >
>  > >  4. Does the lens extend when zoomed?
>  > Yes
>  >
>  > >  5. Does the front element rotate when focusing?
>  > No
>  >
>  > One thing to note about the Bigma is that it is have so a good
>  > tripod/head is almost a must.  I use a manfrotto 055pro + a manfrotto
>  > 393 gimbal head the combo works very well. Hand-held shots are not
>  > out of the question but your hit rate will take a hit. :-) The
>  > weight also means that handleld shoots tend to be short in duration.
>  >  In good light the af is reasonably fast and accurate (at least on
>  > my K10D).
>  >
>  > Regards
>  >
>  > Patrick
>  >
>
>
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-- 
Regards

Patrick Genovese




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