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09-15-2014, 12:19 PM   #1
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FA77MM focusing-ring stuck, can not focus.

Recently, I noticed my FA77mm has a focusing problem.
For some reason, the focusing ring seems to be tracked in some position (the telescope end).
When the cameras (both K01/K5) were set to "autofocus", then I half-pressed the shooting button, I could only hear the noise of the motor, but the viewfinder didn't change.
When I set the cameras to "manual focusing", I still couldn't rotate the focusing ring.
The stuck-focusing-ring problem existed when the lens was removed from the cameras.
This FA77 is a Vietnam assembled version.
Anyone encounter this kind of focusing problem before?
Any suggestion? Thanks a lot!

---------- Post added 09-15-14 at 03:23 PM ----------

My cameras are fine with other lenses, such as FA31MM or 16-45/F4.0

09-15-2014, 03:32 PM   #2
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It appears that you have done all the right steps to isolate the problem. The focus mechanism on your lens is mechanically jammed or broken. I am unaware of any known tendency of the FA 77/1.8 to this sort of problem nor can I remember any report on this site of anything similar. I would not want to speculate regarding potential causes. It is enough to say that they span the full gamut of manufacturing defect, abuse, and normal wear. I would suggest a professional repair.


Steve
09-16-2014, 12:11 PM   #3
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QuoteOriginally posted by stevebrot Quote
It appears that you have done all the right steps to isolate the problem. The focus mechanism on your lens is mechanically jammed or broken. I am unaware of any known tendency of the FA 77/1.8 to this sort of problem nor can I remember any report on this site of anything similar. I would not want to speculate regarding potential causes. It is enough to say that they span the full gamut of manufacturing defect, abuse, and normal wear. I would suggest a professional repair.


Steve
Thanks a lot, Steve.
I checked the price list in Precision Camera.
The price varies from $78.50 to $228.50, plus the part fee.
I'm not sure how serious the focusing ring problem is, whether It's possible to fix it personally.
Personally, I have a handy-hand, but I never fix a lens before.
If it's not that serious and could be fixed in a somehow not too complicated way, then I want to try it myself.
Otherwise a professional repair is needed.
That's why I'm seeking advices.
09-16-2014, 08:36 PM   #4
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QuoteOriginally posted by dawaylong Quote
Personally, I have a handy-hand, but I never fix a lens before.
It requires special tools. I can recommend Micro Tools as a source for the JIS screwdrivers and specialized spanners and lubricants.

Micro-Tools, Camera & Watch Repair Tools - Home

If parts are required, they may be difficult to get. Ricoh no longer sells parts to individuals. You might want to contact Eric Hendrickson, an independent Pentax-trained repair technician in Tennessee. He is competent and is fair in his pricing and is an honest professional.

Eric Hendrickson: pentaxs.com


Steve

09-16-2014, 08:46 PM   #5
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I had the same problem with my 77 MIJ. The focus ring started to feel a bit gritty then not long after got stuck, then it could be moved a bit but seemed to no longer correspond to correct focus. I sent it to Eric, he wants $85 to repair the ring, clean the optics, refocus the lens and ship it back to Canada.
09-17-2014, 08:40 AM   #6
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QuoteOriginally posted by stevebrot Quote
It requires special tools. I can recommend Micro Tools as a source for the JIS screwdrivers and specialized spanners and lubricants.

Micro-Tools, Camera & Watch Repair Tools - Home

If parts are required, they may be difficult to get. Ricoh no longer sells parts to individuals. You might want to contact Eric Hendrickson, an independent Pentax-trained repair technician in Tennessee. He is competent and is fair in his pricing and is an honest professional.

Eric Hendrickson: pentaxs.com


Steve
Thanks a lot for the info.
Actually I have watch tool set.
But I will contact him, because I don't know how serious the problem is.

---------- Post added 09-17-14 at 11:42 AM ----------

QuoteOriginally posted by Deimos Quote
I had the same problem with my 77 MIJ. The focus ring started to feel a bit gritty then not long after got stuck, then it could be moved a bit but seemed to no longer correspond to correct focus. I sent it to Eric, he wants $85 to repair the ring, clean the optics, refocus the lens and ship it back to Canada.
This information is really helpful!
Thanks, Deimos!

Do you still have his contact?
I would like to contact him!

Best,
Dan
09-17-2014, 09:43 AM   #7
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that sounds like the behavior mine was showing moments before the whole front of the lens fell off on the ground due to three loose screws. I recommend getting it in for repair.

09-17-2014, 05:55 PM   #8
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QuoteOriginally posted by dawaylong Quote
Actually I have watch tool set.
Beware the cross-head screws are JIS and require a compatible screwdriver.


Steve

---------- Post added 09-17-14 at 05:56 PM ----------

QuoteOriginally posted by dawaylong Quote
But I will contact him
QuoteOriginally posted by dawaylong Quote
Do you still have his contact?
I would like to contact him!
Same Eric that I gave you the link to.


Steve

09-17-2014, 08:38 PM   #9
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QuoteOriginally posted by dawaylong Quote
Thanks a lot for the info.
This information is really helpful!
Thanks, Deimos!

Do you still have his contact?
I would like to contact him!

Best,
Dan
You can contact him here: Home
09-18-2014, 08:40 AM   #10
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QuoteOriginally posted by stevebrot Quote
Beware the cross-head screws are JIS and require a compatible screwdriver.


Steve

---------- Post added 09-17-14 at 05:56 PM ----------





Same Eric that I gave you the link to.


Steve
Gotcha, thanks a lot.

---------- Post added 09-18-14 at 11:41 AM ----------

QuoteOriginally posted by Deimos Quote
You can contact him here: Home
Got it, thanks
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