17-70mm focusing issues
Posted 06/02/2014 - 16:36
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The 17-70 is an SDM lens, and in my experience can get a little 'lazy' if not used regularly. Also, unfortunately, SDM lenses do fail.
As to low light levels, might be a different issue inherent in all 17-70's and/or your K10D.
Presumably as you've raised these issues they are new to your use of both bits of kit?
As to low light levels, might be a different issue inherent in all 17-70's and/or your K10D.
Presumably as you've raised these issues they are new to your use of both bits of kit?
Posted 06/02/2014 - 16:57
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Thanks JohnX, Your probably right about not being used regularly i was ill for nine months last year and camera and lens only used for a dozen or so shots. The standard lens that came with the camera seems ok, that has not been used for two years.Looks like i will have to put my hand in my pocket again.
Posted 06/02/2014 - 17:43
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Roderick wrote:
Looks like i will have to put my hand in my pocket again.
Not necessarily. Lazy focussing might just be down to lack of use. Looks like i will have to put my hand in my pocket again.
FWIW I run my SDM lenses every couple of weeks for a few minutes, focusing from near to far, etc, and so far no issues.
The kit lens is screw drive, so won't have the SDM issues.
Now (I hope) you're completely over your illness perhaps you and the camera/lens will benefit from getting out and about.
Posted 06/02/2014 - 17:54
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The K10 uses the mechanical drive not SDM.I understand it hunts a bit in low light.
John
John
Posted 06/02/2014 - 18:03
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Thanks again JohnX
I'll take your advice and give it a go and see if it gets any better.
I'll take your advice and give it a go and see if it gets any better.
Posted 06/02/2014 - 18:08
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The 17-70 does hunt in low light, or at least some (mine included) do. The only downside of an otherwise great lens imho.
Posted 06/02/2014 - 19:05
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If it is being used on K10D then SDM is irrelevant, as DOIK pointed out.
It just hunts in low light.
It just hunts in low light.
Posted 06/02/2014 - 19:06
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Gwyn wrote:
The 17-70 does hunt in low light, or at least some (mine included) do.
...and mine, it's very infuriating
The 17-70 does hunt in low light, or at least some (mine included) do.
Barrie - Too Old To Die Young
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
https://pentaxphotogallery.com/artists/barrieforbes
https://www.flickr.com/photos/189482630@N03/
Posted 06/02/2014 - 21:17
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You are right of course, Mike.
Posted 06/02/2014 - 22:00
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Oops from me too
I have the camera ( without the firmware update ) but not the lens.
John
I have the camera ( without the firmware update ) but not the lens.
John
Posted 07/02/2014 - 11:22
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Mike-P wrote:
The 17-70mm is well known for SDM troubles between 50-70mm at infinity, I have had 2 faulty lenses with the same problem. I believe someone on the forum recently had one repaired at at cost of around £120
Yes it was me! (£110 actually) through Asahi Photo.The 17-70mm is well known for SDM troubles between 50-70mm at infinity, I have had 2 faulty lenses with the same problem. I believe someone on the forum recently had one repaired at at cost of around £120
More info in this thread: link
Hope it helps
Andy
Posted 07/02/2014 - 12:01
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When I had the 17-70 I found that the incredibly light-weight focus ring caused the camera to over and undershoot focus.
Gently resting a finger on the focus ring to dampen the loop stopped the hunting. YMMV.
Matt
Gently resting a finger on the focus ring to dampen the loop stopped the hunting. YMMV.
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
(For gallery, tips and links)
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18 years
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