Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-22-2011, 12:52 AM   #16
Veteran Member
philippe's Avatar

Join Date: Apr 2008
Location: Flanders Fields
Posts: 463
Not wanting to highjack this threat, but the DA 21mm I once had wobbled too. So much that, afraid it would fall apart, I finally send it in for repair.
It came back real tight, but it got tighter and tighter while in use, that on certain occasions the AF had trouble with it when going from close to infinity, not vice versa. It went back for repair and was replaced, the new one I got is wobbling too but somewhat lesser and the AF is flying.
I think that there is some wobbling needed to be sure that the AF (screw driven or not) will not be over stressed. To my humble opinion, there are two kinds of wobbling, one due to sluggish assembling and one on purpose for a smooth AF. The trouble is to identify the difference, time will tell....


Last edited by philippe; 01-23-2011 at 04:31 AM.
01-22-2011, 12:59 AM   #17
Veteran Member




Join Date: Aug 2009
Photos: Gallery
Posts: 1,235
QuoteOriginally posted by philippe Quote
I think that there is some wobbling needed to be sure that the AF (screw driven or not) will not be over stressed. To my humble opinion, there are two kinds of wobbling, one due to sluggish assembling and one on purpose for a smooth AF. The trouble is to identify the difference, time will tell....
I agree. I also think there needs to be a little play in some of the lenses like the FA Limiteds as they are all metal and in really hot/cold situations the metal might slightly expand or contract.
01-22-2011, 03:30 AM   #18
axl
Inactive Account




Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
I have silver MIJ version, and it's wobbly too.. but I had the lens repaired by Pentax under warranty for internal damage too...
basically, there are three little pieces of something (ain't sure if it's metal or plastic) that hold the whole front section. One of them snapped in my lens, and was jamming the focusing helicoid. So I had it repaired.

I believe, that if you use this lens hard enough, the front section (the hood and front element) will start to wobble as there are only 3 screws holding the whole thing, and they can come loose....
01-22-2011, 03:53 AM   #19
Ash
Community Manager
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 23,620
Only the slightest of play on mine, and is smooth in function in every way. A fine piece of engineering.

01-22-2011, 08:32 AM   #20
New Member
1banger's Avatar

Join Date: Jan 2011
Location: USA
Posts: 11
Original Poster
Well this is good news! I pretty much thought that this is a normal condition. Especially when the second one turned out to have the same play, maybe even a little more than the first one.

This lens produces exceptional images. That I compare to Leica's color and rendering, but with
more sharpness!
01-23-2011, 10:37 PM   #21
Veteran Member
jeffshaddix's Avatar

Join Date: Jun 2010
Location: Fort Collins, CO
Posts: 1,381
There was this play on my 43mm 1.9 while I still had it...probably nothing to worry about...
01-24-2011, 01:16 PM - 1 Like   #22
Forum Member




Join Date: Oct 2010
Location: vigo
Photos: Gallery
Posts: 85
Hello,

I feel mine ( made in Japan ) is tight , with no wobble at all .
01-24-2011, 05:00 PM   #23
Site Supporter
Site Supporter
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 10,116
MIJ FA31mm f/1.8 owner here - no wobble here, and I have had it for quite some time.

01-24-2011, 11:34 PM   #24
Pentaxian
kyteflyer's Avatar

Join Date: Nov 2008
Location: Newcastle, Australia
Photos: Gallery
Posts: 1,443
What the heck is this MIJ and AIV business (for we uninitiated, but interested, parties ???
01-24-2011, 11:53 PM   #25
Veteran Member
philippe's Avatar

Join Date: Apr 2008
Location: Flanders Fields
Posts: 463
MIJ = Made (and assembled) In Japan
AIV = Assembled In Vietnam (but the components are made in Japan, I hope so...)
01-25-2011, 12:36 AM   #26
Pentaxian
kyteflyer's Avatar

Join Date: Nov 2008
Location: Newcastle, Australia
Photos: Gallery
Posts: 1,443
QuoteOriginally posted by philippe Quote
MIJ = Made (and assembled) In Japan
AIV = Assembled In Vietnam (but the components are made in Japan, I hope so...)
Thanks, Philippe, all these acronyms get confusing at times
01-25-2011, 02:36 AM   #27
Veteran Member
bickrs's Avatar

Join Date: May 2009
Location: Sheffield, South Yorkshire
Posts: 327
MIJ owner since start of December 2010. Only been using since Christmas as present to myself. No discernible irregular movement at all. As Ash noted, a fine piece of engineering and a lens which I can't see myself ever parting with. The weight balance on camera feels perfect in my hands and most importantly the image quality (when I'm not hindering) always brings a smile to my face.
01-26-2015, 01:34 PM   #28
Veteran Member




Join Date: Dec 2013
Location: New Jersey
Posts: 903
QuoteOriginally posted by wlachan Quote
I have come across at least 4 MIJ samples and they all showed this characteristic. Just the way the lens was put together. Nothing to worry.
Sounds I should not worry this issue. My new copy has a slightly wobble on the hood section but it has very impressive sharpness at max aperture. My previous copy hood is firm but has disappointing de-centering issue. So I stopped for further exchange...
01-28-2015, 07:13 AM   #29
Junior Member




Join Date: Apr 2012
Location: Seacoast NH
Posts: 41
AIV - ever so slight wobble, but I hadn't noticed until prompted to look for it. My first prime; I love this lens! So much, that I may have to buy another prime today... Maybe a DA 70 F/2.4...
01-29-2015, 07:38 AM   #30
Veteran Member
drypenn's Avatar

Join Date: Nov 2012
Photos: Albums
Posts: 963
FA31 AIV (Silver): No wobble, not even a slight one. Perfect images. +2 on K30. Nil adjustment on K3
FA77 MIJ (Black): Aperture ring has some play when induced. Perfect images. Nil adjustment on K30 and K3.
FA43 AIV (Black): No wobble, not even a slight one. Can produce perfect images on K30. +4 on K30. Perfect images and nil adjustment on K3.
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!
31mm, front, k-mount, lens, pentax lens, question, section, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
FA 31mm MIV owners. metungnasi Pentax SLR Lens Discussion 4 08-09-2010 12:21 AM
Calling Tamron 10-24mm owners ManixZero Pentax SLR Lens Discussion 10 07-21-2009 12:48 PM
Request for limited owners and K7 owners Psynema Pentax SLR Lens Discussion 0 07-09-2009 07:11 PM
calling other FA31 owners ilya80 Pentax SLR Lens Discussion 5 07-08-2009 12:43 PM
Calling all K200D Owners----please read Ferdy Pentax DSLR Discussion 13 01-20-2009 11:20 AM



All times are GMT -7. The time now is 11:38 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