Why so long??
Posted 21/01/2009 - 13:53
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Mike-P wrote:
Ah yes, I was forgetting about the screw drive stuff, but yes of course that would work! Tooks wrote:
I know you can get the Sigma 2x currently for £99, but I'm struggling to work out what you'd use it with in Pentax fit?
I got one from SRS for my older 70-200mm f2.8 and it works well but its also very good with my Pentax F* 300mm f4.5 in reasonable light .. although manual focus only.I know you can get the Sigma 2x currently for £99, but I'm struggling to work out what you'd use it with in Pentax fit?
Tooks wrote:
albeit mine was a little soft at f2.8, and of course worked just fine without TC's.
A friend of mine has the Tamron version for his Nikon D90 and that is just as bad at f2.8.albeit mine was a little soft at f2.8, and of course worked just fine without TC's.
It's very annoying that so many of these 70-200 f2.8 lenses are soft at f2.8, as that kind of negates the reason for having the fast aperture in the first place!
Posted 21/01/2009 - 23:13
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Quote:
Aye, it was me!
Quick recap;
Sigma 70-200 HSM & Sigma 2x TC = No AF, and generally sends the camera mad with flashing from the screen and top LCD, the shutter won't fire, and so manual focus is impossible too...
Sigma 70-200 HSM & Sigma 1.4x TC = As above...
Sigma 70-200 HSM & Kenko 1.5x DG TC = AF Possible, though you need good light, but it does work, although you need to disable Continuous AF...
Sigma 70-200 HSM & Kenko 2x DG TC = No AF, and sends camera mad again...
Apparently, Sigma are working on a re-design of the TC's for Pentax fit....
The new Sigma 70-200 HSM doesn't have screw drive, so it's HSM or nothing I'm afraid.
It's a shame, because it's a great lens, albeit mine was a little soft at f2.8, and of course worked just fine without TC's.
Thanks v.much for the info guys Aye, it was me!
Quick recap;
Sigma 70-200 HSM & Sigma 2x TC = No AF, and generally sends the camera mad with flashing from the screen and top LCD, the shutter won't fire, and so manual focus is impossible too...
Sigma 70-200 HSM & Sigma 1.4x TC = As above...
Sigma 70-200 HSM & Kenko 1.5x DG TC = AF Possible, though you need good light, but it does work, although you need to disable Continuous AF...
Sigma 70-200 HSM & Kenko 2x DG TC = No AF, and sends camera mad again...
Apparently, Sigma are working on a re-design of the TC's for Pentax fit....
The new Sigma 70-200 HSM doesn't have screw drive, so it's HSM or nothing I'm afraid.
It's a shame, because it's a great lens, albeit mine was a little soft at f2.8, and of course worked just fine without TC's.
I was aware that there were some problems with SDM and TCs, but wow I hadn't realised sigma had dropped such a massive compatibility clanger with the updated 70-200, nor had I noticed that it didn't have screw drive.
That's a -ve point for me as I would like to keep screw drive for compatibility with my film camera.
getting back to OP, I'm looking fwd to handling the 60-250 at SRS open day, hopefully it's a sign it will be out soon - SRS have updated their site to say anticipated in March now.
Maybe the pentax reps will have some info on the planned TC too ?
Posted 21/01/2009 - 23:22
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I've been doing a bit of digging about the Sigma 70-200mm F2.8 EX DG MACRO HSM II lens, it's seems to get mentioned quite a lot that there is a front and back focussing issue with this new lens and it is softer than the older version, can anyone confirm this?
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13627 posts
18 years
Hythe,
Hampshire UK
I know you can get the Sigma 2x currently for £99, but I'm struggling to work out what you'd use it with in Pentax fit?
albeit mine was a little soft at f2.8, and of course worked just fine without TC's.