Author Topic: Stuck Focus Ring Sony SAL 18-70  (Read 6034 times)

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Offline abhilashkumar

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Stuck Focus Ring Sony SAL 18-70
« on: November 16, 2009, 04:50:57 AM »
I have a Sony A300 with the standard 1870 and 75300 lenses.

Yesterday after putting in the 1870, when the camera tried to bring the focus back to infinity, there was a continuous motor straining sound. This repeated when I put the camera off also.

I checked the lens movement and noticed that the focus ring is not turning the full cycle and gets stuck midway and with a little extra pressure, moves ahead. The camera AF motor is not enough for getting past the point where it gets stuck.

The 75300 works fine. Is there an easy way yo fix this or do I need to go to the service center? Also, Sony in India does not provide service for the Alpha system, only replacement in the warranty period, so I have to go to a 3rd party for this repair.

Is this something I can do at home (I have a lot of small tools etc) or should I leave it to the experts?


Offline REX (aka TG)

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #1 on: November 16, 2009, 05:05:53 AM »
You are lucky if you didn't damage the motor gear of the body. If the gears in the lens are plastic then you probably have to repair/replace the lens.


Is this something I can do at home (I have a lot of small tools etc) or should I leave it to the experts?


Better to live it to an expert if it is the first time you are doing this
aSLT/SLR/NEX,DYNAX

Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #2 on: November 16, 2009, 05:31:34 AM »
@TC Since this is a standard kit lens, I am willing to give it a try myself.

However, I think I will show it to the experts first. Do you know of a link where someone describes the process. I found a few for Canon and Nikon but none for Sony.

Quote
You are lucky if you didn't damage the motor gear of the body
You bet. I don't think that it is damaged as the 75300 works fine.

Since the camera resets the lens to infinity on being turned on and also on being turned off, it was quite scary as generally things stop when you turn them off.


hackman127

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #3 on: November 16, 2009, 05:47:07 AM »
Since the focus gears are plastic, there is likely nothing you'll be able to do about it. Probably some chewed up teeth, but there is always the chance it's just something that's fallen into the lens and got ground into the teeth. If you are confident in your abilities and the lens is out of warranty, I'd say go for it, but I've not torn into the kit lens myself. I've torn into a 50mm prime and a Sigma 100-300. From my experience, just work very slowly and try your best to understand each part and how it works before you pull it off. That can save you a lot of headaches.

Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #4 on: November 16, 2009, 06:07:45 AM »
@hackman

I will keep that in mind in case I need to hack in myself.

On the bright side... this is a good excuse for me to go in for that 50mm prime I have always wanted :-)

Offline tpe

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #5 on: November 16, 2009, 09:58:20 AM »
If it is the 18-70 kit lens a replacement would be cheaper than getting it fixed by a professional. Therefore you have little to loose doing it your self.


However, the cheaper lenses are not really meant to be repaired, and are a lot harder to work on than the high end lenses. Sorry not much of a help but may be worth knowing.

You find there are many more things glued or pressed together, and that a lot of things being assembled by a robot would need a custom jig to re-assemble, so it can easily go wrong or just be too difficult to align properly. Fortunatly if it does go wrong you only have to replace a cheaper lens though, and you may even have an excuse to buy a better lens used?!.

Best of luck.

Tim


Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #6 on: November 17, 2009, 03:59:52 AM »
@Tim
What you say makes sense. I was also thinking that if the repair guy can exchange this one with a 50mm. I anyway use this lens between 35 to 65mm most of the time. A 50mm Prime would be good. I'll be checking of they will exchange and I can pay the difference.

Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #7 on: November 18, 2009, 04:11:03 AM »
have given the 1870 for repair. The repair guys think it will cost about 1500 to 2000 rupees (about USD40).

However to drown my sorrows I have bought a used Minolta 50mm 1.7. Took some looking but I managed to find a 85 year old shop that had some 10 year old Minolta lenses in decent shape. Even they didnt have the 1.4 and said that it woudl cost me about triple of the 1.7 which cost me 5400 rupees (about USD 105) and works great.

Will now wait for the 1870 to get fixed, or not. lets see.

Offline fother

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #8 on: November 18, 2009, 05:50:54 AM »

sounds like a pretty good outcome :)

enjoy the 50mm - maybe you'll share some images with us?

Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #9 on: November 18, 2009, 05:56:52 AM »
I am actually just getting used to not zooming. Will put up a few images as soon as I can.

Offline chappo1

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #10 on: November 18, 2009, 06:28:09 AM »
I strongly suspect that you will never use the 18-70 again unless it is for the 18mm end as athe quality will be nowhere near the 50mm prime...john
“Time is a great teacher, but unfortunately it kills all its pupils."

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Offline abhilashkumar

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Re: Stuck Focus Ring Sony SAL 18-70
« Reply #11 on: November 19, 2009, 04:15:57 AM »
Sample Images from the 50mm. No editing of colours or anything. Just a little cropping in 1 or 2. No enhancement of any sort.

A mask and a red bus



The red bus



Close up of a clothes clip



The tree outside my apartment window



Window grill