Sigma 500mm f4.5 with TC's?


SteveT

Link Posted 18/02/2012 - 12:35
Can the 500mm fv.5 be used with TC's and still retain AF? I am under the impression not, as AF is only available at f4?
K20d
DA 12-24 | DA* 16-50 | DA* 50-135 | Sigma 100-300 F4
Lightroom 2, CS3
My FlickR

Blythman

Mike-P

Link Posted 18/02/2012 - 13:11
Sigmas list is not totally 100% accurate though .. my 100-300mm f4 used to AF with the 2x (although speed took a big hit). They do seem to err on the side of caution.

I would imagine the 1.4x will ... the 2x probably not.
No equipment list here but thanks for taking an interest. My Flickr

SteveT

Link Posted 18/02/2012 - 15:43
cheers
Since 500 f4.5 shows no AF on either TC then it looks like I'm going to have to go Nikon for a long lens, was hoping to upgrade to a K-5 and use the sigma but it may have to be a Nikon 500 f4 because i want the flexibility of that extra bit of reach
K20d
DA 12-24 | DA* 16-50 | DA* 50-135 | Sigma 100-300 F4
Lightroom 2, CS3
My FlickR

bassman

Link Posted 29/02/2012 - 20:56
I have a Sigma 500mm f4.5 EX DG, and yes it will AF with a 1.4x tc

Mattyobz123

Link Posted 05/03/2012 - 19:35
I can also vouch for that. Surprisingly well too!
K5 GX20 10-20 [3.5] 50[1.4] 70-200 [2.8] 500 [4.5]+Matched Converters
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