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Comment by matwhittington posted on Clocking-off..... at 08/05/2010 - 19:24
Mat
Comment by matwhittington posted on A quick set from this morning... at 08/05/2010 - 17:36
I believe that the Sigma TCs are designed to exclusively work with sigma lenses so you may find that is not the best choice.
You'll need to check the specifications of the candidate TCs in detail... The DA* lens is an SDM lens so if you want to retain autofocus you will need a TC which supports SDM focussing... and you'll also need one with the contacts in it to enable the automatic aperture control as the lens has no aperture ring. If you look up the relevant TCs on the web (e.g. on the Tamron webpage, Sigma webpage etc.) you'll probably find the details of what lenses the TC is compatible with and whether it is 'dumb' or not..
Don't know if that helps much - am sure others here will know more than I...
Regards
Mat W
Comment by matwhittington posted on Teleconverter for DA* 300mm at 08/05/2010 - 15:49
Thanks for the vote of confidence Mike on the PPG front - I think I'll enter it.
Thanks again all
Mat W
Comment by matwhittington posted on A quick set from this morning... at 08/05/2010 - 15:41
First up, a dandelion between showers...

and a blade of grass likewise

The garden pests march down the underside of a bud (keeping dry perhaps)

and a tiny, almost transparent, snail pretends to be king of the castle

All were taken with flash and hand-held... hope you like them. As usual, any C&C welcome.
Regards
Mat W
Comment by matwhittington posted on A quick set from this morning... at 08/05/2010 - 11:57
Mat
Comment by matwhittington posted on Blenheim, 31mm & 77mm Ltds at 08/05/2010 - 09:35
Regards
Mat
Comment by matwhittington posted on A Dull Morning in the Park at 08/05/2010 - 09:33
Mat
Comment by matwhittington posted on Doronicum at 08/05/2010 - 09:24
Mat
Comment by matwhittington posted on Breakfast time? at 07/05/2010 - 20:04
Mat W
Comment by matwhittington posted on Odd one out at 07/05/2010 - 13:56


Regards
Mat W