Will autofocus work between K-1 and my Sigma 70-200mm f/2.8 EX DG HSM II Macro?

dcpropilot · 04-02-2016, 07:08 AM

I love this lens, and am curious whether I might expect autofocus compatibility issues with this lens and the K-1...

Taken with my K-3:

**gaweidert** · 04-02-2016, 07:10 AM

I see no reason for it not to. Same mount on both cameras.

**volley** · 04-02-2016, 07:29 AM

Why should there be any issue??
When AF works on a K3 (or any other Pentax DSLR) there is no reason it should not work on the K1.

tassosDA · 04-02-2016, 08:21 AM

Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this

Rupert · 04-02-2016, 08:39 AM

May work even better! Unless.....
https://www.pentaxforums.com/forums/190-pentax-k-1/316399-some-old-guy-k1-questions-2.html

Be careful out there, shooting MF with no option is no fun!

I'm looking forward to my K1 and getting back to AF ability!

Regards!

Forgot! That's a damn fine looking Doggie!

dcpropilot · 04-02-2016, 09:12 AM

Originally posted by tassosDA

Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this

Uh, oh.....

---------- Post added 04-02-2016 at 12:13 PM ----------

Originally posted by Rupert

Forgot! That's a damn fine looking Doggie!

Thanks, just got him a couple of weeks ago!!

reh321 · 04-02-2016, 09:32 AM

Originally posted by volley

Why should there be any issue??
When AF works on a K3 (or any other Pentax DSLR) there is no reason it should not work on the K1.

Originally posted by tassosDA

Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this

This is potentially very serious, much more important than OBF or video.
volley is correct; every lens that works on K-3 should work well on K-1 {with exception of possible vignetting}
No K-mount lens should cause K-1 to freeze.
Hopefully this will be fixed in ver 1.0; otherwise they need to have an emergency patch out.

RMabo · 04-02-2016, 09:50 AM

Sigma lenses does not use an official version of Pentax lens mount, Sigma uses "reverse engineering". Even if the K-1 surely will work well with Pentax AF lenses new and old, there is no guarantee that they will work with non-standard mount lenses such as Sigma. Hopefully they will work just fine. My Sigma lenses from the film SLR era works just fine with my digital bodies. Now a HSM lens is a little more complicated but I have had zero issues with my Sigma HSM lens (18-50 f/2.8-4.5) on different Pentax DSLR models so chances are high that K-1 will have zero issues here.

DeadJohn · 04-02-2016, 10:08 AM

Originally posted by tassosDA

Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this

I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses.

Confirmation would be bad news for many of us especially if additional Sigma lenses don't work correctly. If the K-1 is at fault, Ricoh might not want to devote resources to lenses made by someone else. If the Sigma 70-200 is to blame, Sigma probably doesn't care since they have been gradually abandoning K-mount; the 70-200 is a discontinued lens.

HopelessTogger · 04-02-2016, 10:18 AM

Originally posted by DeadJohn

I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses.

Confirmation would be bad news for many of us especially if additional Sigma lenses don't work correctly. If the K-1 is at fault, Ricoh might not want to devote resources to lenses made by someone else. If the Sigma 70-200 is to blame, Sigma probably doesn't care since they have been gradually abandoning K-mount; the 70-200 is a discontinued lens.

Let's wait and see. I need to know a whole bunch of things about something that costs big bucks before I order.

Pre-orderers/early adopters I salute you! If it was not for you brave souls such questions would never be answered and post launch price drops never be had.

**baldeagle21b** · 04-02-2016, 10:46 AM

Originally posted by reh321

This is potentially very serious, much more important than OBF or video.
volley is correct; every lens that works on K-3 should work well on K-1 {with exception of possible vignetting}
No K-mount lens should cause K-1 to freeze.
Hopefully this will be fixed in ver 1.0; otherwise they need to have an emergency patch out.

You mean "Hopefully this is an erroneous report, otherwise I will have to send in all my Sigma lenses
back for rechipping at Sigma". There, I fixed it for ya.

**volley** · 04-02-2016, 11:21 AM

Originally posted by DeadJohn

I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses.

I was thinking the same ... my Sigma HSM lens never had an issue on K5 or K3. I am very confident the K1 (with final firmware at least) will just work fine.

tassosDA · 04-02-2016, 12:10 PM

I want to make clear that this only happened with the 70-200!! As soon as we mounted again the 77 ltd, the camera continued to work perfectly normal. The same goes for the lens on my K5 II. Everything was fine. So yes, I think it's a firmware issue...

HopelessTogger · 04-02-2016, 12:24 PM

Originally posted by tassosDA

I want to make clear that this only happened with the 70-200!! As soon as we mounted again the 77 ltd, the camera continued to work perfectly normal. The same goes for the lens on my K5 II. Everything was fine. So yes, I think it's a firmware issue...

What's the autofocus like?

Thanks

reh321 · 04-02-2016, 12:40 PM

Originally posted by baldeagle21b

You mean "Hopefully this is an erroneous report, otherwise I will have to send in all my Sigma lenses
back for rechipping at Sigma". There, I fixed it for ya.

No.
I am a mostly-retired software developer, who now teaches college part-time.
I teach my students that every system must be "robust", which means that it must respond gracefully to every set of inputs, no matter how unusual they be. Total lockup is not a graceful response. The K-1 itself, without assistance from other lenses, flashes, etc, must not respond that way ... and I trust that Pentax will deal with this problem.

BTW - in my early years as a developer, the bitter "joke" told about then-dominant IBM was that if they didn't want to fix a reported bug, they would simply document it, calling it a "special feature". That arrogant style response doesn't work in our modern world, where any product can be replaced over-night

04-02-2016, 07:08 AM	#1
dcpropilot Veteran Member Join Date: Mar 2010 Location: Vermont Photos: Gallery \| Albums Posts: 941	Will autofocus work between K-1 and my Sigma 70-200mm f/2.8 EX DG HSM II Macro? I love this lens, and am curious whether I might expect autofocus compatibility issues with this lens and the K-1... Taken with my K-3:

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04-02-2016, 07:10 AM	#2
gaweidert Loyal Site Supporter Join Date: Mar 2012 Location: Rochester, NY Photos: Gallery Posts: 5,325	I see no reason for it not to. Same mount on both cameras.

04-02-2016, 07:29 AM	#3
volley Site Supporter Join Date: Jan 2009 Location: Springe Photos: Gallery Posts: 3,693	Why should there be any issue?? When AF works on a K3 (or any other Pentax DSLR) there is no reason it should not work on the K1.

04-02-2016, 08:21 AM	#4
tassosDA New Member Join Date: Feb 2016 Posts: 5	Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this

04-02-2016, 08:39 AM	#5
Rupert Veteran Member Join Date: Sep 2006 Location: Texas Photos: Gallery \| Albums Posts: 25,123	May work even better! Unless..... https://www.pentaxforums.com/forums/190-pentax-k-1/316399-some-old-guy-k1-questions-2.html Be careful out there, shooting MF with no option is no fun! I'm looking forward to my K1 and getting back to AF ability! Regards! Forgot! That's a damn fine looking Doggie!

04-02-2016, 09:12 AM	#6
dcpropilot Veteran Member Join Date: Mar 2010 Location: Vermont Photos: Gallery \| Albums Posts: 941 Original Poster	Originally posted by tassosDA Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this Uh, oh..... ---------- Post added 04-02-2016 at 12:13 PM ---------- Originally posted by Rupert Forgot! That's a damn fine looking Doggie! Thanks, just got him a couple of weeks ago!!

04-02-2016, 09:32 AM	#7
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,177	Originally posted by volley Why should there be any issue?? When AF works on a K3 (or any other Pentax DSLR) there is no reason it should not work on the K1. Originally posted by tassosDA Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this This is potentially very serious, much more important than OBF or video. volley is correct; every lens that works on K-3 should work well on K-1 {with exception of possible vignetting} No K-mount lens should cause K-1 to freeze. Hopefully this will be fixed in ver 1.0; otherwise they need to have an emergency patch out.

04-02-2016, 09:50 AM	#8
RMabo Veteran Member Join Date: Jul 2007 Location: Sweden Posts: 845	Sigma lenses does not use an official version of Pentax lens mount, Sigma uses "reverse engineering". Even if the K-1 surely will work well with Pentax AF lenses new and old, there is no guarantee that they will work with non-standard mount lenses such as Sigma. Hopefully they will work just fine. My Sigma lenses from the film SLR era works just fine with my digital bodies. Now a HSM lens is a little more complicated but I have had zero issues with my Sigma HSM lens (18-50 f/2.8-4.5) on different Pentax DSLR models so chances are high that K-1 will have zero issues here.

04-02-2016, 10:08 AM	#9
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,833	Originally posted by tassosDA Well guess what... Just yesterday I tried my sigma 70-200 mm 2.8, II on a K1 with a pre release firmware and the camera totally blacked out!! Not only didn't the AF work, but everything on the camera froze, you couldn't even turn it off or on!!! Thankfully the lens worked ok when I put it back on my K5II. As the sales person told me this was probably the result of the not final firmware!! Hope they will fix this I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses. Confirmation would be bad news for many of us especially if additional Sigma lenses don't work correctly. If the K-1 is at fault, Ricoh might not want to devote resources to lenses made by someone else. If the Sigma 70-200 is to blame, Sigma probably doesn't care since they have been gradually abandoning K-mount; the 70-200 is a discontinued lens.

04-02-2016, 10:18 AM	#10
HopelessTogger Veteran Member Join Date: Jan 2016 Location: Roi-et, Thailand Posts: 773	Originally posted by DeadJohn I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses. Confirmation would be bad news for many of us especially if additional Sigma lenses don't work correctly. If the K-1 is at fault, Ricoh might not want to devote resources to lenses made by someone else. If the Sigma 70-200 is to blame, Sigma probably doesn't care since they have been gradually abandoning K-mount; the 70-200 is a discontinued lens. Let's wait and see. I need to know a whole bunch of things about something that costs big bucks before I order. Pre-orderers/early adopters I salute you! If it was not for you brave souls such questions would never be answered and post launch price drops never be had.

04-02-2016, 10:46 AM	#11
baldeagle21b Site Supporter Join Date: Nov 2006 Posts: 223	Originally posted by reh321 This is potentially very serious, much more important than OBF or video. volley is correct; every lens that works on K-3 should work well on K-1 {with exception of possible vignetting} No K-mount lens should cause K-1 to freeze. Hopefully this will be fixed in ver 1.0; otherwise they need to have an emergency patch out. You mean "Hopefully this is an erroneous report, otherwise I will have to send in all my Sigma lenses back for rechipping at Sigma". There, I fixed it for ya.

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04-02-2016, 11:21 AM	#12
volley Site Supporter Join Date: Jan 2009 Location: Springe Photos: Gallery Posts: 3,693	Originally posted by DeadJohn I'm doubtful any time a brand new forumite posts something like this. Waiting for others to confirm/dispel issues with the 70-200 or other Sigma lenses. I was thinking the same ... my Sigma HSM lens never had an issue on K5 or K3. I am very confident the K1 (with final firmware at least) will just work fine.

04-02-2016, 12:10 PM	#13
tassosDA New Member Join Date: Feb 2016 Posts: 5	I want to make clear that this only happened with the 70-200!! As soon as we mounted again the 77 ltd, the camera continued to work perfectly normal. The same goes for the lens on my K5 II. Everything was fine. So yes, I think it's a firmware issue...

04-02-2016, 12:24 PM	#14
HopelessTogger Veteran Member Join Date: Jan 2016 Location: Roi-et, Thailand Posts: 773	Originally posted by tassosDA I want to make clear that this only happened with the 70-200!! As soon as we mounted again the 77 ltd, the camera continued to work perfectly normal. The same goes for the lens on my K5 II. Everything was fine. So yes, I think it's a firmware issue... What's the autofocus like? Thanks

04-02-2016, 12:40 PM	#15
reh321 Pentaxian Join Date: Nov 2014 Location: South Bend, IN, USA Photos: Gallery \| Albums Posts: 23,177	Originally posted by baldeagle21b You mean "Hopefully this is an erroneous report, otherwise I will have to send in all my Sigma lenses back for rechipping at Sigma". There, I fixed it for ya. No. I am a mostly-retired software developer, who now teaches college part-time. I teach my students that every system must be "robust", which means that it must respond gracefully to every set of inputs, no matter how unusual they be. Total lockup is not a graceful response. The K-1 itself, without assistance from other lenses, flashes, etc, must not respond that way ... and I trust that Pentax will deal with this problem. BTW - in my early years as a developer, the bitter "joke" told about then-dominant IBM was that if they didn't want to fix a reported bug, they would simply document it, calling it a "special feature". That arrogant style response doesn't work in our modern world, where any product can be replaced over-night