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01-30-2014, 10:40 AM   #1
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Loose focusing ring on 45mm

Hi
The plastic focusing ring of the lens turns without focusing. I have to press harder for it to focus. It does the job but itīs annoying and would like to fix this. Help anyone?
Thanks

01-30-2014, 09:48 PM   #2
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A drop or two of adhesive might solve the problem. It sounds to me as it the grippy ring on top of the real ring is loose. If the lens is really important to you, it might be worth a trip to Eric's Pentaxs.com (note the s) to find out what it would cost to repair.
01-31-2014, 12:08 AM   #3
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Yes you are correct it is the grippy ring. Now question is : how do I fix this? I am travelling in Europe and won't be in the U.S for another few months. This is my spare 45mm so I could take the chance. I will investigate,thanks.
01-31-2014, 12:50 AM   #4
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It's rubber isn't it? I'm fingering it beside me as I write...feels like rubber, albeit a very tough rubber. Maybe a plasticised rubber?? Whatever...

01-31-2014, 08:23 AM   #5
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Rubber it is! I just want to get under :-)
01-31-2014, 11:43 AM   #6
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If I were to do an emergency repair on something like that, I would use rubber cement on the grounds that it is grippy but fairly easily removed when needed. Only a drop or two should do it, strategically placed under the ring with a toothpick.
01-31-2014, 11:43 PM   #7
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Rubber cement is a good idea, but I surmise the general structural integrity of the rubber ring has in some way become compromised and might need replacement (not a DIY job). If rubber cement doesn't hold fast and long, next step would be use to a resin-based adhesive for a more certain and permanent grip.
02-01-2014, 05:19 PM   #8
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QuoteOriginally posted by Substitute Quote
...I have to press harder for it to focus.
Although everyone has provided advice on the issue... I'm a little surprised that a great deal of force is needed to turn the focusing ring?

It sounds as if the rubber grip is spinning in the focusing ring and so the contact cement as failed. Is the ring very stiff to operate?
Or in other words, if the rubber grip was properly attached to the ring, could you move it with a single finger?

02-10-2014, 09:19 AM   #9
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It is actually the rubber grip on the ring that is loose. The focusing ring is smooth. I just need to stick it back.
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