Pentax DA*16-50 f/2.8

Unregistered User · 05-27-2016, 01:10 PM

Hi there!

Anyone with this lens that can tell me if mine is ok or it is time for a visit to the workshop.

When extented if grabbing the front and gently move from side to side mine fells really "loose". It move maybe 1 mm in each direction.

Is it normal?

Medex · 05-27-2016, 01:17 PM

Originally posted by Tjompen1968

Hi there!

Anyone with this lens that can tell me if mine is ok or it is time for a visit to the workshop.

When extented if grabbing the front and gently move from side to side mine fells really "loose". It move maybe 1 mm in each direction.

Is it normal?

in my opinion it is not normal. Optical elements should be strictly centered

Adam · 05-27-2016, 01:20 PM

Could be wear and tear to be honest. This has happened with my 18-135mm lens. Of course that one isn't built as solidly as the 16-50, but I didn't notice any deterioration in image quality.

Unregistered User · 05-27-2016, 01:25 PM

It is only 1 year old and have not seen that much action.

slivo · 05-27-2016, 01:25 PM

when extended, mine is also loose. i think it is because of the double tubus...

DeadJohn · 05-27-2016, 01:30 PM

My 16-50 wobbles like that, too.

Unregistered User · 05-27-2016, 01:35 PM

How old are yours? How much use?

slivo · 05-27-2016, 02:11 PM

bought new in 10/2014. used seldom (cca. 3000 photos). it was like this since the beginning.

**jatrax** · 05-27-2016, 02:35 PM

1mm is not very much. Mine always moved at least that much. Are you happy with the images? If so, no worries.

Unregistered User · 05-27-2016, 02:44 PM

Ok, thanks. Just never noticed it before and it just came back from a AF motor change so I thought they maybe forgot a screw or two

NigelP · 06-07-2016, 10:51 AM

Mine is also loose. I suspect more than 1mm. This lens has been repaired twice already (once for SDM failure and once for zoom cam failure). Images are not as sharp as those taken with my 50-135. Time for yet another repair or a new lens? What other standard, wide aperture zooms do people have? Which ones would you recommend?

05-27-2016, 01:10 PM	#1
Unregistered User Guest	*Pentax DA16-50 f/2.8** Hi there! Anyone with this lens that can tell me if mine is ok or it is time for a visit to the workshop. When extented if grabbing the front and gently move from side to side mine fells really "loose". It move maybe 1 mm in each direction. Is it normal?

05-27-2016, 01:20 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Could be wear and tear to be honest. This has happened with my 18-135mm lens. Of course that one isn't built as solidly as the 16-50, but I didn't notice any deterioration in image quality. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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05-27-2016, 01:17 PM	#2
Medex Pentaxian Join Date: May 2013 Location: Vilnius Posts: 1,021	Originally posted by Tjompen1968 Hi there! Anyone with this lens that can tell me if mine is ok or it is time for a visit to the workshop. When extented if grabbing the front and gently move from side to side mine fells really "loose". It move maybe 1 mm in each direction. Is it normal? in my opinion it is not normal. Optical elements should be strictly centered

05-27-2016, 01:25 PM	#4
Unregistered User Guest	It is only 1 year old and have not seen that much action.

05-27-2016, 01:25 PM	#5
slivo New Member Join Date: Nov 2011 Posts: 17	when extended, mine is also loose. i think it is because of the double tubus...

05-27-2016, 01:30 PM	#6
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,834	My 16-50 wobbles like that, too.

05-27-2016, 01:35 PM	#7
Unregistered User Guest	How old are yours? How much use?

05-27-2016, 02:11 PM	#8
slivo New Member Join Date: Nov 2011 Posts: 17	bought new in 10/2014. used seldom (cca. 3000 photos). it was like this since the beginning.

05-27-2016, 02:35 PM	#9
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	1mm is not very much. Mine always moved at least that much. Are you happy with the images? If so, no worries.

05-27-2016, 02:44 PM	#10
Unregistered User Guest	Ok, thanks. Just never noticed it before and it just came back from a AF motor change so I thought they maybe forgot a screw or two

06-07-2016, 10:51 AM	#11
NigelP New Member Join Date: Feb 2012 Photos: Gallery Posts: 15	Mine is also loose. I suspect more than 1mm. This lens has been repaired twice already (once for SDM failure and once for zoom cam failure). Images are not as sharp as those taken with my 50-135. Time for yet another repair or a new lens? What other standard, wide aperture zooms do people have? Which ones would you recommend?