Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-15-2012, 01:03 PM   #1
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Is my lens OK

Hi. I just bought a Pentax DA*SMC55mm f1.4 SDM lens from Shueido Camera in Taiwan on ebay. It was sold as second hand but in mint condition.I paid $709 US and $30 postage. It arrived quickly with nothing but the lens. No bag or paperwork.
My problem is that when I turn the focus ring on the lens, where other ones go 'clunk' from stop to stop, this one is able to turn further and ring can go fully around in both directions. Once it gets to the 'clunk' either way, it then makes a slight binding noise as it moves beyond the stop. It does not sound or feel that it is doing anything damaging, but is this normal for this lens?
I tried a few shots yesterday when it arrived and found that the AF is not that accurate and for a crisp shot I had to manually correct the focus. Your advice would be much appreciated.
Cheers Mark

10-15-2012, 01:13 PM   #2
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,695
G'day mate.
This is normal behaviour for DA* lenses. It will not harm the lens if you do this but AF should be accurate as long as your focus point is on the subject you intended to focus on.
Try posting some examples with intact EXIF for more info.
10-15-2012, 01:26 PM   #3
Pentaxian
JinDesu's Avatar

Join Date: Jun 2011
Location: New York City
Photos: Gallery
Posts: 5,626
For the focus ring: That is called a clutch mechanism, and allows the Quick Shift focusing for the DA* lenses. What happens is - there is a clutch ring within the focus ring that allows you to rotate the focus ring, even with the focusing motor engaged. The clutch ring prevents damage to the focusing motor - and lets you make adjustment to the focus manually without switching to manual focus mode.
10-15-2012, 01:46 PM   #4
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
Thanks for the quick reply Ash

10-15-2012, 01:47 PM   #5
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
Thank you, just the info I needed.. I'll leave the feedback for the purchase on ebay.now.Cheers
10-15-2012, 03:42 PM   #6
Site Supporter




Join Date: Mar 2012
Location: Perrineville, NJ
Posts: 1,365
Regarding the focus error: many of the DA*55 were reported to back focus, including the one I bought new in Spring of 2012. You can read about this in the Lens Database. On my K-5, I can easily compensate for this by applying +8 focus correction in the menu (I do plan to send it in for adjustment before the warranty expires).

If you are running one of the older DSLRs which do not support focus correction on a per-lens basis, then you may not have as much luck, if the focus problem you describe is due to back (or front) focus.
10-15-2012, 04:38 PM   #7
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
Hi. I looked at the menu on my K10D and it doesn't support compensation. I will be updating to a new K5ii or iis soon and I tried out the focus again just a short time ago and Its out. I obviously have no warranty because of purchasing second hand. So I will try and find out if there is somewhere I can send it to here in Australia for correction.
You state that you compensate in your K5 menu... Does that mean that every time you change lens you have to reset it back.?
Cheers Mark
10-15-2012, 04:44 PM - 1 Like   #8
Site Supporter
Fries's Avatar

Join Date: Oct 2009
Location: Gauw
Photos: Gallery | Albums
Posts: 1,888
The correction will only apply's to this specific lens and when you mount another lens it won't apply that correction to that lens. So no, you don't have to reset it back when you change lenses.

10-15-2012, 06:58 PM - 1 Like   #9
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,695
A K-5 II is a good idea. You'll be greatly impressed at the advancement of the camera from your K10D.
10-15-2012, 08:23 PM - 1 Like   #10
Site Supporter




Join Date: Mar 2012
Location: Perrineville, NJ
Posts: 1,365
To add to Fries explanation, the K-5 (and many of the other newer bodies) have the ability to store individual focus corrections for up to something like 20 different lenses. Don't quote me on the exact number, I just know it is more lenses than I own. As soon as you re-mount a lens, it remembers the correction factor you previously entered for that lens.

If you are going to upgrade to a newer body anyhow, then you might want to just wait and see how it works with the lens. You may find that focus correction is all you need, and you don't have to go through the trouble and cost of having the lens adjusted at a repair facility. Of course, it also depends on whether you intend to keep the K10D along with the K-5 II/s.
10-19-2012, 03:57 PM   #11
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
I relented... Just bought a new K5 from DWI $500 cheaper then the K5iiS. It will be a big improvement on my old faithful K10D and I will be able to fine tune the back focus on my new DA* 55
10-19-2012, 06:53 PM   #12
Veteran Member
DaveHolmes's Avatar

Join Date: Jul 2010
Location: Yorkshire
Posts: 1,501
QuoteOriginally posted by eastbankflowers Quote
I relented... Just bought a new K5 from DWI $500 cheaper then the K5iiS. It will be a big improvement on my old faithful K10D and I will be able to fine tune the back focus on my new DA* 55
You absolutely will not regret it!
I moved from K-x to K5 and the improvement in IQ is vast...
11-10-2012, 03:33 AM   #13
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
I now have my new K5 and I have adjusted the AF to the maximum of 10 to correct. It still won't focus. So I will have to find somewhere to send it, to be professionally adjusted.. Where can I can send my new DA* SMC 55 f1.4 lens to. To be recallibrated.?
11-13-2012, 04:37 PM   #14
Site Supporter
Fries's Avatar

Join Date: Oct 2009
Location: Gauw
Photos: Gallery | Albums
Posts: 1,888
That's bad luck Mark! I am on the other side of the world so I can't help you with you latest question, but perhaps someone who lives a little closer by can help? And perhaps it is it possible to return the lens and get a refund?
11-13-2012, 05:18 PM   #15
New Member
eastbankflowers's Avatar

Join Date: Oct 2012
Location: Cooloola Cove Queensland
Photos: Gallery
Posts: 13
Original Poster
Thanks Fries. I have set it to max 10+ and its still not quite right at f1.4. but at higher settings it still produces a nice crisp shot. I'll live with it for a while, and see how it goes.
Cheers Mark
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!
camera, focus, lens, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Keep K-x buy premium lens, get K-r and get good lens, get the K-7 w/ lens or K-5? crossover37 Pentax DSLR Discussion 19 02-06-2011 10:38 PM



All times are GMT -7. The time now is 09:59 AM. | 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