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Forum: Pentax K-1 & K-1 II 05-12-2016, 05:30 AM  
Sigma announcement about K-1 lens issue
Posted By Caat
Replies: 345
Views: 44,406
Does anyone know where the "K-mount Specification" is written down and exactly what it precisely covers?
Forum: Pentax K-1 & K-1 II 05-12-2016, 04:03 AM  
Sigma announcement about K-1 lens issue
Posted By Caat
Replies: 345
Views: 44,406
I agree. However, the slight ambiguity in the Sigma note may put some people off.

There is going to be significant lag in Sigma fixing these lenses however. I think it is great that they are offering obviously.
Forum: Pentax K-1 & K-1 II 05-12-2016, 02:46 AM  
Sigma announcement about K-1 lens issue
Posted By Caat
Replies: 345
Views: 44,406
The worry that I have is that - what is admittedly a relatively minor issue - could easily get blown out of proportion. For example, buyer goes into a shop.

Buyer: Oh, I am interested in the new K-1. What lenses are available for it?

Shop: Well, Pentax have three new lenses released, a handful of older lenses that are still in production and then a large number of lenses that are no longer made.

Buyer: OK, so not many of these 'designed for digital lenses' I hear so much about?

Shop: No, but you can mount Pentax's DA lenses on it.

Buyer: Hmmm, I see. So what about other makers, like Sigma?

Shop: Well Sigma has just issued an advisory saying that some of its newer lenses may damage the camera.

Buyer: OK, well thanks anyway. Think I'll shop around.

The point being that unsympathetic people can blow this out of proportion and anyone with existing Sigma lenses who don't frequent forums but may see the note from Sigma - either like above, or by reading it on Sigma's site - and may well be spooked.

There are also potential implications for other more exotic lens designs such as tilt and shift lenses.

The main issue is that you don't want a narrative developing which is: "there is a design flaw on the K-1". Which we know there isn't really, just an oversight regarding a number of lenses made by other manufacturers.
Forum: Pentax K-1 & K-1 II 05-11-2016, 11:56 AM  
Sigma announcement about K-1 lens issue
Posted By Caat
Replies: 345
Views: 44,406
Sorry, that link was an advertising link inserted by Pentax Forums. I didn't put in there, and I wasn't trying to make a point about lens availability with it.
Forum: Pentax K-1 & K-1 II 05-11-2016, 09:36 AM  
Sigma announcement about K-1 lens issue
Posted By Caat
Replies: 345
Views: 44,406
The problem is that Pentax does not exactly have the luxury of a large, modern, 35mm lens line up.

Given that Pentax users have often had to rely on third parties for certain lens types - notably fast 70-200s from Sigma and Tamron and larger telephotos in general - I think it is shortsighted of Pentax not to check for these kinds of issues.

No one is saying that they MUST do it, but the absolutely last thing Pentax wants is for the "Pentax has no lenses" argument to be given credence by the largest third party lens maker saying "some of our lenses should not be mounted on the K1".
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