Sigma Damage to K-1

funktionsfrei · 06-26-2016, 11:34 PM - **1 Like**

Originally posted by nater

Does anyone have any experience with pre-HSM Sigma EX and EX DG lenses on the K-1?

Yes. Usually, they work without problems. I've got two - a 12-24 and a 24-70, both sporting a diaphragm ring (lockable in 'A' position).

You can check yourself - the bayonet ring on the "affected" lenses, that is those with the mechanical problem, ist really huge. Check the image above posted by noelpolar, here you can see the bayonet contacts in relation to the ring's diameter.

Older Sigma lenses used normal-sized bayonet rings (at least the ones I know of), so there's no problem.

The firmware problem (causing camera body lockups) might be related to SDM/HSM lenses only, since the KAF3 protocol clearly is different from the KAF protocol.

From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma.

Last edited by funktionsfrei; 06-26-2016 at 11:35 PM. Reason: removed double quote

Erd§ · 06-27-2016, 04:37 AM

Originally posted by nater

Does anyone have any experience with pre-HSM Sigma EX and EX DG lenses on the K-1?

I can confirm that there is no issue with mounting the 100-300mm f4 EX DG on the K-1, and it works as expected.

funktionsfrei · 06-27-2016, 08:38 AM

Originally posted by funktionsfrei

From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma.

It was being serviced - today I got it back -- for free!

ahw · 06-27-2016, 09:20 AM

Anyone see a problem with just putting a thin strip of tape over the part of the K-1 body that gets scratched?

funktionsfrei · 06-27-2016, 10:51 AM

Won't help. If there is not enough clearance between lens and camera body, inserting something between them does not improve anything.

The lens will press against the "thin strip of tape" resulting in additional shearing on the lens mount.

No, I would not consider this a good idea.

**nater** · 06-27-2016, 11:24 AM

Originally posted by funktionsfrei

Yes. Usually, they work without problems. I've got two - a 12-24 and a 24-70, both sporting a diaphragm ring (lockable in 'A' position).

You can check yourself - the bayonet ring on the "affected" lenses, that is those with the mechanical problem, ist really huge. Check the image above posted by noelpolar, here you can see the bayonet contacts in relation to the ring's diameter.

Older Sigma lenses used normal-sized bayonet rings (at least the ones I know of), so there's no problem.

The firmware problem (causing camera body lockups) might be related to SDM/HSM lenses only, since the KAF3 protocol clearly is different from the KAF protocol.

From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma.

Thank you for confirming what I had inferred/expected. I'll be very happy if my efforts to avoid owning any HSM lenses work out well in the end with regards to the K-1.

**jackassp** · 06-28-2016, 04:50 AM

I sent off my 35/1.4 Art, and 85mm/1.4 DG HSM, and got them both back within 1 week (Australia). Problem solved, and both work better on the K-1 than they ever did on the K-3.
Now waiting for 24-70 and 50-500 to come back.

JP

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06-26-2016, 11:34 PM - 1 Like	#31
funktionsfrei Senior Member Join Date: Feb 2012 Posts: 183	Originally posted by nater Does anyone have any experience with pre-HSM Sigma EX and EX DG lenses on the K-1? Yes. Usually, they work without problems. I've got two - a 12-24 and a 24-70, both sporting a diaphragm ring (lockable in 'A' position). You can check yourself - the bayonet ring on the "affected" lenses, that is those with the mechanical problem, ist really huge. Check the image above posted by noelpolar, here you can see the bayonet contacts in relation to the ring's diameter. Older Sigma lenses used normal-sized bayonet rings (at least the ones I know of), so there's no problem. The firmware problem (causing camera body lockups) might be related to SDM/HSM lenses only, since the KAF3 protocol clearly is different from the KAF protocol. From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma. Last edited by funktionsfrei; 06-26-2016 at 11:35 PM. Reason: removed double quote

06-27-2016, 04:37 AM	#32
Erd§ Veteran Member Join Date: Aug 2010 Location: SEQ Posts: 323	Originally posted by nater Does anyone have any experience with pre-HSM Sigma EX and EX DG lenses on the K-1? I can confirm that there is no issue with mounting the 100-300mm f4 EX DG on the K-1, and it works as expected.

06-27-2016, 08:38 AM	#33
funktionsfrei Senior Member Join Date: Feb 2012 Posts: 183	Originally posted by funktionsfrei From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma. It was being serviced - today I got it back -- for free!

06-27-2016, 09:20 AM	#34
ahw Junior Member Join Date: Feb 2011 Location: Fresno, CA Photos: Gallery Posts: 33	Anyone see a problem with just putting a thin strip of tape over the part of the K-1 body that gets scratched?

06-27-2016, 10:51 AM	#35
funktionsfrei Senior Member Join Date: Feb 2012 Posts: 183	Won't help. If there is not enough clearance between lens and camera body, inserting something between them does not improve anything. The lens will press against the "thin strip of tape" resulting in additional shearing on the lens mount. No, I would not consider this a good idea.

06-27-2016, 11:24 AM	#36
nater Loyal Site Supporter Join Date: Aug 2009 Location: New England Photos: Albums Posts: 706	Originally posted by funktionsfrei Yes. Usually, they work without problems. I've got two - a 12-24 and a 24-70, both sporting a diaphragm ring (lockable in 'A' position). You can check yourself - the bayonet ring on the "affected" lenses, that is those with the mechanical problem, ist really huge. Check the image above posted by noelpolar, here you can see the bayonet contacts in relation to the ring's diameter. Older Sigma lenses used normal-sized bayonet rings (at least the ones I know of), so there's no problem. The firmware problem (causing camera body lockups) might be related to SDM/HSM lenses only, since the KAF3 protocol clearly is different from the KAF protocol. From all the Sigma glass I've got only one is problematically, that's the 70-200/2.8 APO EX DG HSM Macro II, and that one's currently being serviced by Sigma. Thank you for confirming what I had inferred/expected. I'll be very happy if my efforts to avoid owning any HSM lenses work out well in the end with regards to the K-1.

06-28-2016, 04:50 AM	#37
jackassp Site Supporter Join Date: Apr 2010 Location: Adelaide, South Australia Photos: Gallery Posts: 813	I sent off my 35/1.4 Art, and 85mm/1.4 DG HSM, and got them both back within 1 week (Australia). Problem solved, and both work better on the K-1 than they ever did on the K-3. Now waiting for 24-70 and 50-500 to come back. JP