Tinning on Nikkor 18-200mm lens
Aug 24, 2016 18:38:09 #
In a prior post someone mentioned that this lens and some other Nikon lenses are subject to "tinning" which can yield to failure and shorting out other components. Since my lens is about 7 years old, it raised a couple of questions in my mind:
1. Is it possible to see this "tinning" process on the lens?
2. This lens has been into Nikon twice for repair as I have fallen on it hiking. Each time the lens was repaired. Does Nikon check for this "tinning" process?
2. Is the lens repairable or does the lens have to be discarded?
Thank you very much for your response.
1. Is it possible to see this "tinning" process on the lens?
2. This lens has been into Nikon twice for repair as I have fallen on it hiking. Each time the lens was repaired. Does Nikon check for this "tinning" process?
2. Is the lens repairable or does the lens have to be discarded?
Thank you very much for your response.
Aug 24, 2016 18:46:53 #
DataTamer wrote:
In a prior post someone mentioned that this lens a... (show quote)
What the heck is "tinning" over 45 years in the photography field and this is the first I have heard of it.
Aug 24, 2016 18:54:32 #
I'm glad you wrote that. That was my first thought when I read the title.
--Bob
--Bob
MT Shooter wrote:
What the heck is "tinning" over 45 years in the photography field and this is the first I have heard of it.
Aug 24, 2016 18:57:06 #
MT Shooter wrote:
What the heck is "tinning" over 45 years in the photography field and this is the first I have heard of it.
i think he is referring to the growth of whiskers in the electronics and shorting things out.
http://www.materialsfinishing.org/attach/7.%20Tin%20Whisker%20Growth;%20Geoff%20Wilcox;%20Loughbrough.pdf
Aug 24, 2016 18:58:19 #
Leitz
Loc: Solms
DataTamer wrote:
In a prior post someone mentioned that this lens a... (show quote)
I wouldn't be concerned about it. Sardines last for years once they're tinned.
Aug 24, 2016 19:02:52 #
oldtigger wrote:
i think he is referring to the growth of whiskers in the electronics and shorting things out
That's it!
Aug 24, 2016 19:11:18 #
rmalarz wrote:
I'm glad you wrote that. That was my first thought when I read the title.
--Bob
--Bob
I had thought that since pro cameras today are made of magnesium instead of brass that the silvery finish revealed when the paint came off might be called "tinning", but only if someone was trying to invent a new word rather than "brassing". But I still have no clue.
Aug 24, 2016 19:17:09 #
mas24
Loc: Southern CA
The OP has yet to define what tinning is? Why should we have to guess what he meant.
Aug 24, 2016 19:41:03 #
As mentioned previously, I believe he's referring to the conductive "whiskers" that grow over time from the use of non-lead solder. My understanding is that the seriousness of the issue is dependent on the manufacturing process (manufacturers have been adapteding their processes to non lead bearing solder ), the specific solder composition, and environmental factors. The only occurrences / concerns that I've seen reported on the Hog concerned Hasselblads and the high cost of PC board replacement. The move to non-lead solder in electronic equipment was reportedly driven by European ROHS requirements. Environmental overkill with unintended consequences in my opinion. I believe US military weapons systems are exempt from the requirement.
Aug 24, 2016 20:25:41 #
Yes Trix you are right. I was writing in reference to a post that was posted about buying an older nikkor lens. One poster made the comment that since non-lead solder was used on the 18-200mm Nikkor there was a chance of "tinning" or growing whiskers. I was trying to get some clarification on it so I could handle the matter preemptively.
Aug 25, 2016 02:39:54 #
Pablo8
Loc: Nottingham UK.
It seems that, unless the item (lens) has been subjected to 150 degrees for 24 hours, the lens will be OK.
Aug 25, 2016 05:27:18 #
DataTamer wrote:
In a prior post someone mentioned that this lens a... (show quote)
Tinning is a process used in soldering , a thin coat of solder is applied to both surfaces before they are joined with a little more solder, However I haven't seen it done when soldering circuit boards.
Aug 25, 2016 06:00:09 #
I Tin my lead when I'm melting it to make bullets. Makes the lead real hard so it wont scrub off in the lands and grooves.
But I never heard of Lens Tinning. Just saying.
But I never heard of Lens Tinning. Just saying.
Aug 25, 2016 06:54:51 #
oldtigger wrote:
i think he is referring to the growth of whiskers in the electronics and shorting things out.
http://www.materialsfinishing.org/attach/7.%20Tin%20Whisker%20Growth;%20Geoff%20Wilcox;%20Loughbrough.pdf
http://www.materialsfinishing.org/attach/7.%20Tin%20Whisker%20Growth;%20Geoff%20Wilcox;%20Loughbrough.pdf
That was my thought, but it seems that these whiskers are more of a theoretical problem. I've never seen it in anything I own.
Aug 25, 2016 07:05:35 #
DataTamer wrote:
In a prior post someone mentioned that this lens a... (show quote)
+++++++++++++++++++++++++++++++
Yes, it is possible to see tinning taking place within a lens assembly, but not upon the glass elements themselves. Being that you sent your lens into Nikon twice, I am certain that if tinning was visible within your lens, a Nikon technician would had whisked it away with high heat and some pressurized air. As far as the lens being repairable if any tinning was present within its circuitry, I would have to say, "yes" or otherwise, the lens would not function at all. To conclude, I should think that you needn't have any concern or concerns about a tinning process taking place within your lens because if it were to be present, the optical quality of your lens would suffer ~ meaning: It would no longer work in conjunction with your camera's circuitry. Hopefully, this answers your questions.
Have a good day,
~ Doug ~
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