Info regarding Sigma lenses on a K1


smudge

Link Posted 13/05/2016 - 10:12
Yes. I have the non HSM version of the 24-70. It is a comfortable fit - no rubbing - and performs very well on the K1
Regards, Philip

bforbes

Link Posted 13/05/2016 - 10:16
Thanks, I called Sigma UK this morning but they were waiting on further info from the factory.
Barrie
Too Old To Die Young

http://www.pentaxphotogallery.com/artists/barrieforbes

DaveKitson

Link Posted 13/05/2016 - 10:55

Algernon

Link Posted 13/05/2016 - 11:15
DaveKitson wrote:
It seems that Sigma are not hanging around on this:

http://www.dpreview.com/news/3395336918/sigma-offers-part-replacement-to-prevent...

davek

Unlike Pentax who are now losing K-1 sales and doing nothing

--
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

RobL

Link Posted 13/05/2016 - 11:34
Algernon wrote:
DaveKitson wrote:
It seems that Sigma are not hanging around on this:

http://www.dpreview.com/news/3395336918/sigma-offers-part-replacement-to-prevent...

davek

Unlike Pentax who are now losing K-1 sales and doing nothing

--

What evidence is there for sales being affected? It is likely that not all Sigma K-mount lenses give this problem, and current models will I guess have the modification done at source.

Algernon

Link Posted 13/05/2016 - 11:47
If you had say 3 lenses that were effected would you buy a K-1?
They aren't Sigma's lenses..... they are YOUR lenses.

If you can only buy mail order would you buy and hope the lenses fit?

Would you be happy scratching your spanking new body?

Best possible case for Pentax would be that Sigma owners would say.... "I'll hold off until I see what Pentax do..... Maybe they will bring out a K-2...... Maybe they will sell off old stocks of the K-1 at 50% discount to Sigma owners"

--
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 13/05/2016 - 11:57

RobL

Link Posted 13/05/2016 - 11:56
Yes because it is still better than the alternatives and the lenses will be fixed. I have used the Sigma 150-500 which didn't scratch the body and got really sharp results, and compared to my K50 any noise at high ISO or poor light can much more easily be removed in Lightroom without noticeable loss of sharpness.

bforbes

Link Posted 13/05/2016 - 12:05
Are any Pentax made legacy lenses the wrong size to fit the K-1?
Barrie
Too Old To Die Young

http://www.pentaxphotogallery.com/artists/barrieforbes

JAK

Link Posted 13/05/2016 - 12:05
Has anyone worked put where on the K-1 body the potential scratch may be occurring as I cannot detect any evidence of this?
John K

bforbes

Link Posted 13/05/2016 - 12:13
JAK wrote:
Has anyone worked put where on the K-1 body the potential scratch may be occurring as I cannot detect any evidence of this?

Here are some pictures. link
Barrie
Too Old To Die Young

http://www.pentaxphotogallery.com/artists/barrieforbes

smudge

Link Posted 13/05/2016 - 12:15
JAK wrote:
Has anyone worked put where on the K-1 body the potential scratch may be occurring as I cannot detect any evidence of this?

See my post a bit further up this thread. The bit of red tape I put on the camera shows where the mark is (I have since replaced the red tape with black to make it less noticeable).
Regards, Philip

smudge

Link Posted 13/05/2016 - 12:19
I was watching a K1 review on you tube last night. They were using a Sigma lens on it and the scratch on the housing was clearly visible, although they did not remark on it.
Regards, Philip

RobL

Link Posted 13/05/2016 - 12:45
Correction - having seen the photo in the link above, yes there is a very faint scratch just above the lens mount of my K-1 from the Sigma 150-500. Not as noticeable as in the photo and cannot be seen with a lens in place. So, Sigma will modify their lenses but who is going to rectify the damaged bodies? I guess Pentax will say they aren't responsible for what third party products do and maybe Sigma weren't given a pre-production model to test, so it's down to goodwill by someone.

Comparing a Pentax lens mount with the Sigma, the Sigma has a much wider plate with countersunk screws near the outer rim. If you run a finger over these you can feel a sharp edge to the hole the screws are set in which is presumably what is causing the problem. So I would say the fault is definitely with Sigma's mount.
Last Edited by RobL on 13/05/2016 - 12:59

Algernon

Link Posted 13/05/2016 - 13:22
I'm more concerned about what damage the crow-bar effect of the lens pushing against the mag body will have especially if the lens gets knocked. It certainly won't restrict any damage just to the lens mount.

I'm glad I'm not buying a K-1 I could be tempted if they discount them to about 500 I'd risk my Sigma 150-500mm on that

--
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

RobL

Link Posted 13/05/2016 - 13:36
Algernon wrote:
I'm more concerned about what damage the crow-bar effect of the lens pushing against the mag body will have especially if the lens gets knocked. It certainly won't restrict any damage just to the lens mount.

I'm glad I'm not buying a K-1 I could be tempted if they discount them to about 500 I'd risk my Sigma 150-500mm on that

--

Well I will be swapping my Sigma for a Pentax lens as soon as funds permit.
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