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10-21-2015, 09:19 AM   #1
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Help My K3 lens mount got bent!

Hi don't think Viagra will fix this one
had it in a lowepro toploader case with my DA300 & strap broke & fell about 50cm to a wood floor! and you can see what happened
is it possible to fix, I think to remove the lens mount ring & try to straighten it or find another or send to Pentax service
I just wonder if where the screws are held in place has been damaged??
any help is appreaciated
Thanks

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10-21-2015, 09:30 AM   #2
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I like to do things myself but in this case I would send it for repair. Even if you got the plate perfectly flat (doubtful) what else might have been damaged or missaligned? You would need to put it on a test bench to make sure everything is correct and we do not have access to those instruments.
10-21-2015, 09:36 AM   #3
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QuoteOriginally posted by jatrax Quote
I like to do things myself but in this case I would send it for repair. Even if you got the plate perfectly flat (doubtful) what else might have been damaged or missaligned? You would need to put it on a test bench to make sure everything is correct and we do not have access to those instruments.
Yes that's true..no test gear,but I work as a repair tech..but for music instruments...
do you think its worth fixing? as the K3II has dropped again in price,have no idea what the repair can cost
so much for 'built like a tank' Mr. Newton & the laws of leverage have won here
10-21-2015, 09:48 AM   #4
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QuoteOriginally posted by Shanti Quote
Mr. Newton & the laws of leverage have won here
Yes, it is amazing to me always the power that extra leverage provides. In both good ways and sometimes bad(:

Worth fixing? I don't know, all you can do is ask for a quote and decide. I've no idea where to send it in Europe or how they handle repairs. Here in US it seems they work on "flat rate" quotes so you have some idea going in what it will cost.

10-21-2015, 09:59 AM   #5
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I know the service center in Sweden,s o wil ask them..don't think warranty covers it though I use it mostly with the 150-450 & the mount was getting a bit loose before the fall..
10-21-2015, 10:14 AM   #6
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Sorry to hear of this terrible situation.

It is possible that the impact was absorbed mainly by the camera mount, as the metal mount ring has been deformed. The lens may have been damaged also, so it should be tested (perhaps on another camera, or later when your K-3 has been repaired).

You might try to straighten the metal mount, which may be removed easily from the camera. Making it flat it may be difficult, however, owing to the shape of the mount (it is not a simple flat disk). The strained metal might not easily return to its original shape.

As for the possible damage to the screw holes in the body, see a recent post by DaveR for a superbly detailed description: https://www.pentaxforums.com/forums/114-maintenance-repair-articles/306083-k-...nt-repair.html

Considering that other mechanical damage may have been caused within the camera, the camera should be fully tested for optical alignment and mechanical functions.

Like you and jatrax, I am fairly handy at fixing things, and have made several repairs to old SLRs and lenses. In this case, a repair by a service centre would be my recommendation.

How did the Lowepro case break - a buckle or a snap? Such a failure is troubling.

Good luck. Sorry about the damage.

- Craig
10-21-2015, 10:22 AM   #7
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doesn't look like anything but the ring is damaged. i'd unscrew it and very carefully bend it back into shape. you'll need a hard flat surface to place it on to check for high and low spots. that one screw may need a bit of locktite if you can't get it to tighten properly when you put it back together.
10-21-2015, 10:32 AM   #8
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I would be sending the lens to be looked at too, quite frankly. If the whole lot hit the ground hard enough to bend the mount, God only knows what's happened to the alignment and integrity of the lens elements.

10-21-2015, 10:54 AM   #9
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This may inspire you:
https://www.pentaxforums.com/forums/114-maintenance-repair-articles/306083-k-...ml#post3405591

I would try to replace the mount. It should not be too difficult. Hopefully nothing else was damaged.
10-21-2015, 11:02 AM   #10
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QuoteOriginally posted by c.a.m Quote
Sorry to hear of this terrible situation.

It is possible that the impact was absorbed mainly by the camera mount, as the metal mount ring has been deformed. The lens may have been damaged also, so it should be tested (perhaps on another camera, or later when your K-3 has been repaired).

You might try to straighten the metal mount, which may be removed easily from the camera. Making it flat it may be difficult, however, owing to the shape of the mount (it is not a simple flat disk). The strained metal might not easily return to its original shape.

As for the possible damage to the screw holes in the body, see a recent post by DaveR for a superbly detailed description: https://www.pentaxforums.com/forums/114-maintenance-repair-articles/306083-k-...nt-repair.html

Considering that other mechanical damage may have been caused within the camera, the camera should be fully tested for optical alignment and mechanical functions.

Like you and jatrax, I am fairly handy at fixing things, and have made several repairs to old SLRs and lenses. In this case, a repair by a service centre would be my recommendation.

How did the Lowepro case break - a buckle or a snap? Such a failure is troubling.

Good luck. Sorry about the damage.

- Craig
Hi Thanks

the Lowepro strap clip plastic got on the outside of the clip & popped off, has happened before but I caught it luckily
I have a K5II so can test the lens for alignment as much as I can,the center is still sharp I can see,not damage to lens mount...

I know metals quite well & once strained,very hard to bend back,but a new ring can't be so $$
10-21-2015, 11:51 AM   #11
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Send it to a pro.

Behind the bent mount are springs and contacts that go sproing.

Best luck,
aoeu

Last edited by aoeu; 10-21-2015 at 11:53 AM. Reason: Too fast
10-21-2015, 12:30 PM   #12
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You could get a non working donor body and replace the bent flange.
10-21-2015, 12:33 PM   #13
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QuoteOriginally posted by pentasonic49 Quote
You could get a non working donor body and replace the bent flange.
think there are K3II donors as so new, or will K3 /K5II work as well?
10-21-2015, 01:58 PM   #14
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More pics of patient

Some more pics of the mount,can see 1 screw bushing is partially stripped(though screw can tighten)
metal plate bent in 2 places,would need to make a jig to press it evenly ..easier to find a new one or 'borrow' from my K5II
the plastic is carbon fiber reinforced,according to another member here,so epoxy fill or a light cured material should fix it
all depends how much the service center wants & if I can get a new mount ring(as Ricoh will not sell to private anymore )
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10-21-2015, 02:35 PM   #15
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Assuming that you can get a replacement or straighten the extant mount, how can you verify that the mount has the right registration to the sensor and that it is parallel to the sensor?

I have done it many times with film cameras, using a micrometer with a flat, machined, tetragonal, brass rod measuring to a glass plate held against the film rails with the shutter held open.

I have no idea how to do that with I digital camera. If you measured to the filter, how thick is that? What is the air gap between that filter and the sensor? Is the front edge of the filter at the film plane or is it slightly behind it?

There are way too many variables to handle it properly and it is unlikely that you have the right tools.

This sounds like a repair shop with the knowledge and tools is the best path.
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