Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-11-2016, 02:58 PM   #151
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 15,501
QuoteOriginally posted by monochrome Quote
dcshooter has a post on another thread about the public (and private) K-mount spec., which has never, ever changed.
QuoteOriginally posted by monochrome Quote
K-1 clearance is apparently more than the minimum, but does not accommodate the largest of the Sigma mounts
Then Pentax is clearly in the wrong for not changing their ages old standard to accommodate a competitor.
This is just one of the reasons the K-1 is doomed.

They didn't consult with Sigma on its design.
They added pixel shift which is totally useless to any pro photographer.
It isn't as good at video as a dedicated video camera.

Why did they even bother releasing this thing? Very few are going to buy it, and those poor unfortunates who do are going to find it virtually useless because of those horrendous shortcomings.

05-11-2016, 03:09 PM - 1 Like   #152
Loyal Site Supporter




Join Date: Apr 2010
Location: Tennessee
Posts: 5,677
QuoteOriginally posted by Parallax Quote
Okay, but how much will they lose due to people buying the Sigma lenses instead of Pentax lenses?
I actually bought into Pentax because several of the lenses I wanted were offered by Sigma. I bought into Pentax expecting a future FF body and I wasn't interested in the DA lenses. The reason I am shooting with a K-1 today is because of 3rd party lens support. There are a lot of people who look at 3rd party options like Sigma, Tamron, or Zeiss when making a decision. Ricoh benefits from that.
05-11-2016, 03:12 PM - 1 Like   #153
Pentaxian
Na Horuk's Avatar

Join Date: Feb 2012
Location: Slovenia, probably
Photos: Gallery | Albums
Posts: 10,700
The only reason why Pentax should have thought about accommodating Sigma is because Sigma is, for better or worse, filling up the holes in the Pentax lineup. And has been for a while. These Sigma lenses are not coming out next month, but they were here before the K-1. And they are widely used. Sure, Ricoh could say they don't care, if they would have brought a complete lineup out, preferably before the actual camera hit the shelves. Since that was not possible, adding just 2-4mm clearance could have been thought about. Maybe it even was? I still wonder about the background behind this whole issue. It seems like such a small thing, not a drastic change to the camera. But eh, at least the warning is out and there is a solution.
05-11-2016, 03:20 PM   #154
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 15,501
QuoteOriginally posted by Winder Quote
I actually bought into Pentax because several of the lenses I wanted were offered by Sigma.
I don't remember Sigma ever producing a lens exclusively in Pentax mount. Weren't those lenses also offered in Nikon and Cannon mount? Your statement confuses me a bit.
Perhaps I'm misunderstanding something here. As I read it you bought a Pentax because you hoped they would someday make a FF so you could use Sigma lenses on the not yet produced FF. Lenses that could be had in Cannon and Nikon mount for their already in existence FFs.

05-11-2016, 03:26 PM   #155
csa
Loyal Site Supporter
csa's Avatar

Join Date: Aug 2014
Location: Montana mountains
Posts: 8,412
K1/Sigma lens compatibility warning!

Sigma Announces Lens Compatibility Issues with K-1 - Third-Party Announcements | PentaxForums.com

In case some of you new K1 owners missed this.
05-11-2016, 03:31 PM   #156
Forum Member




Join Date: Nov 2014
Location: Monterey County, California
Photos: Albums
Posts: 84
QuoteOriginally posted by ShiftR Quote
So I put the 35 A under some goooood lighting, and I unfortunately have to retract my previous statements. I can see the interference they are talking about, which isn't where I was even looking initially. There is also a slight rub in the body. That being said, it's not at a level to stop me from using the lens just yet. I'm guessing the repair for this will be machining a sharper edge angle of the mount by a hair. Picture attached. You probably need to zoom in a bit.
.
ShiftR,
I have just received my K-1 and was using it with the 35 Art I bought for it. I can see the lens mount flange clearance issue you are talking about. However, with my lens/camera combo, there is no scuff mark and I can see a tiny space between the camera body and the lens beveled area. It clears my new camera, but just by a whisker. I am going to continue to use the Sigma. I can see how, by mounting and un-mounting the lens, if you don't hold the lens square, it might slightly scuff the body. I'm not going to worry about it.
05-11-2016, 03:35 PM   #157
Forum Member




Join Date: Dec 2007
Location: Philippines
Photos: Gallery
Posts: 63
I don't have a K-1, but I was really excited to eventually try my sigma 85 on it if and when I eventually save up to get the K-1. Hopefully by the time I could get the K-1, sigma's repair for this issue is already up and running.
05-11-2016, 03:36 PM   #158
Emperor and Senpai
VoiceOfReason's Avatar

Join Date: Jun 2010
Location: Nashville, IN
Posts: 5,328
Confirmed, no scratch on mine.

05-11-2016, 03:37 PM   #159
Loyal Site Supporter
monochrome's Avatar

Join Date: Mar 2008
Location: Kirkwood (St. Louis) MO
Photos: Gallery | Albums
Posts: 20,049
It appears to me the bulk of the people who believe Pentax erred are the same people who have a considerable capital investment in the offending Sigma lenses, which is perfectly understandable. If I were in the position I'd have that sinking feeling in my stomach, too.

Thankfully, Sigma has responded quickly to the situation, publishing an informational notice to consumers and offering to 'repair' their non-compliant lenses. Interestingly, so far it appears only Sigma has offered a figurative mea culpa.

Q.E.D.
05-11-2016, 04:09 PM   #160
Forum Member
Jake21209's Avatar

Join Date: May 2007
Location: Maryland
Posts: 81
Before everyone runs around with their on fire, you need to read the complete document. "We have found that some SIGMA interchangeable lenses for Pentax mount could leave a small scratch on part of the camera body when they are attached to the PENTAX K-1.We are planning to provide a repair service for this issue. That being said, it would be best to either try an existing lens on the list and see if it does in-fact leave a small scratch on the camera body. Most of the Pentax DSLR bodies are built like the provable battle tank and a small scratch can easily be covered with a small dab of paint if you so desire.

I have both a SIGMA 180 macro and the notorious 70 -200 telephoto and while I do not, at this time, have a K-1, it is on my prime list for a purchase this summer. My K-5 has a scratch on the body when I fell into the Little Gun Powder river 3 years ago and came in personal contact with a rather large rock. The K-5 has a small scratch and I was to worse for ware. It has not dimmed my use of the K-5 either cosmetically or the quality of my photos and the scratch is so small that I hardly think about it.

Jay
05-11-2016, 04:27 PM - 1 Like   #161
Emperor and Senpai
VoiceOfReason's Avatar

Join Date: Jun 2010
Location: Nashville, IN
Posts: 5,328
Close, but no contact. It is a PITA to get a good pic, but there is a fraction on a MM between it. So either Pentax had sloppy machining and tolerances or Sigma did. Not going to complain either way because both work fine.
Attached Images
View Picture EXIF
SM-G920V  Photo   
05-11-2016, 05:01 PM   #162
Loyal Site Supporter




Join Date: Apr 2010
Location: Tennessee
Posts: 5,677
QuoteOriginally posted by Parallax Quote
I don't remember Sigma ever producing a lens exclusively in Pentax mount. Weren't those lenses also offered in Nikon and Cannon mount? Your statement confuses me a bit.
Perhaps I'm misunderstanding something here. As I read it you bought a Pentax because you hoped they would someday make a FF so you could use Sigma lenses on the not yet produced FF. Lenses that could be had in Cannon and Nikon mount for their already in existence FFs.
I didn't say they were exclusive. I bought the Sigma 85mm which was not available from Pentax. I bought the Sigma 50mm F/1.4 because after trying the DA* 55mm I preferred the Sigma. I was going to buy the Sigma 70-200mm and the 24-70mm, but I was waiting on the FF option. For a long time the only Pentax lens I owned was the 31mm and that was bought before the Sigma 35mm ART was released. I really liked the Pentax bodies and IBIS since I was coming over from shooting the Olympus E-3. The DA lenses I really never cared anything about.
05-11-2016, 05:10 PM   #163
Senior Moderator
Loyal Site Supporter
Parallax's Avatar

Join Date: Apr 2008
Location: South Dakota
Photos: Gallery
Posts: 15,501
Fair enough. I understood your statement "I actually bought into Pentax because several of the lenses I wanted were offered by Sigma." to mean that you bought into Pentax (i.e. you didn't have a Pentax) so you could use Sigma lenses.
05-11-2016, 05:28 PM - 1 Like   #164
Pentaxian
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 4,107
QuoteOriginally posted by stevebrot Quote
Thumbs down to Pentax for cutting things a little close here. I suspect that clearance with some Pentax product might be a little tight as well.
Has anybody tried mounting any of the Pentax K-mount bellows on the K-1 yet?

So did Ricoh check the clearance on all Pentax F, FA, DA and D FA. Maybe. Maybe they check A, M and K lenses to. Is it Ricoh responsibility to check compatibility with 3rd Party lenses that aren't paying the license for the K-mount? No. It probably isn't even Ricoh's responsibility check compatibility with licensed lenses. Precedent - Asahi-Pentax adding the power zoom contacts to the mount causing some Vivitar lenses with oversized flanges not to fit or fit scratching the contacts or bracket for the contacts. Those lenses were designed and manufactured before the power zoom contacts were added to the K-mount specifications. Is that Pentax fault they aren't forward compatible especially if they were outside the specifications to begin with?
05-11-2016, 05:41 PM - 1 Like   #165
mee
Site Supporter




Join Date: May 2010
Posts: 5,663
I now wonder if this means other Sigma lenses may never see K mount due to this issue? I was hoping to see the 24-105 f/4 and the longer macros (150 and 180mm) show up in K mount.. It's kind of too bad if not. I prefer Sigma lenses too..
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
announcement about k-1, body, camera, compatibility, design, dozen, dslr, full frame, full-frame, issue, k-1, k-1 lens, k1, lens, lenses, mount, nikon, pentax, pentax k-1, pka, scratch, sigma, sigma announcement, space, third party lenses
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
my 1-k words about the K-1 jimr-pdx Pentax Full Frame 35 05-15-2016 02:32 PM
Question How to Unpin the 'Pentax K-1 Full Frame' announcement at the top of page mee Site Suggestions and Help 8 02-26-2016 09:00 AM
Announcement no one is talking about: Macro converter GM-1 astron Ricoh GR 4 02-23-2016 02:31 PM
For Sale - Sold: Sigma 50mm f1:2.8 K-A Mount 1:1 Macro Manual Focus Lens $85 shipped to US Archimedes the Dog Sold Items 7 11-28-2015 09:46 AM
Dreaming about next PMA announcement regken Pentax DSLR Discussion 3 02-28-2007 08:24 AM



All times are GMT -7. The time now is 05:47 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top