|
|
|
|
| Author |
Message |
mikeN
Guest
|
 Posted: Fri May 25, 2007 11:34 pm Post subject: glass powder inside lens |
 |
|
Dropped my Nikon D70. Fortunately I had a uv filter on the end of the lens
and a lens cap on top of that. The result is the impact on a sharp rock on
the ground forced the lens cap through the uv filter, making a hole in this
filter a cm wide. The glass on the main lens itself is unmarked!!
However, I noticed this evening that there is a quantity of very fine glass
powder deposited on the inside of the the lens. Is this likely to be much
of a problem? I can't imagine how much it might cost to have the lens
proffesionally cleaned, plus I need to use it. |
|
| Back to top |
|
 |
|
|
cyrusthevirus
Guest
|
| Posted: Fri May 25, 2007 11:34 pm Post subject: Re: glass powder inside lens |
|
|
Il 26/05/2007 00:38, Mike Russell dixit:
| Quote: | "mikeN" <mikeyN@nospam.com> wrote in message
news:tt6dnfYdZ_5lwsrbRVnyiwA@bt.com...
Dropped my Nikon D70. Fortunately I had a uv filter on the end of the
lens and a lens cap on top of that. The result is the impact on a sharp
rock on the ground forced the lens cap through the uv filter, making a
hole in this filter a cm wide. The glass on the main lens itself is
unmarked!!
However, I noticed this evening that there is a quantity of very fine
glass powder deposited on the inside of the the lens. Is this likely to
be much of a problem? I can't imagine how much it might cost to have the
lens proffesionally cleaned, plus I need to use it.
Wow- did that filter ever pay for itself. What you are seeing is almost
certainly not glass powder , but fine dust or condensed material that you
did not notice before. I recommend you ignore it.
If you're handy with fine work, it's generally easy to remove the front
element of a lens, provided you have a lens spanner wrench.
http://www.filmtools.com/lenandfilspa.html
Otherwise any repair person can clean the front element for a reasonable
cost.
|
Ask a quote to a professional: lenses don't love this type
of hits, and it would be better to check all the movements.
BTW, is it possible to see a photo of the filter?
Just to persuade who is claiming UV filter are useless!
Cyrus |
|
| Back to top |
|
|
Mike Russell
Guest
|
| Posted: Fri May 25, 2007 11:34 pm Post subject: Re: glass powder inside lens |
|
|
"mikeN" <mikeyN@nospam.com> wrote in message
news:tt6dnfYdZ_5lwsrbRVnyiwA@bt.com...
| Quote: | Dropped my Nikon D70. Fortunately I had a uv filter on the end of the
lens and a lens cap on top of that. The result is the impact on a sharp
rock on the ground forced the lens cap through the uv filter, making a
hole in this filter a cm wide. The glass on the main lens itself is
unmarked!!
However, I noticed this evening that there is a quantity of very fine
glass powder deposited on the inside of the the lens. Is this likely to
be much of a problem? I can't imagine how much it might cost to have the
lens proffesionally cleaned, plus I need to use it.
|
Wow- did that filter ever pay for itself. What you are seeing is almost
certainly not glass powder , but fine dust or condensed material that you
did not notice before. I recommend you ignore it.
If you're handy with fine work, it's generally easy to remove the front
element of a lens, provided you have a lens spanner wrench.
http://www.filmtools.com/lenandfilspa.html
Otherwise any repair person can clean the front element for a reasonable
cost.
--
Mike Russell
www.curvemeister.com |
|
| Back to top |
|
|
THO
Guest
|
| Posted: Fri Jun 01, 2007 4:14 pm Post subject: Re: glass powder inside lens |
|
|
In article <kr9f53hut42tapks805hmb5ipg5cm71pqu@4ax.com>,
HokusPokus <findme@noaddress.org> wrote:
| Quote: | On Sat, 26 May 2007 00:48:24 +0200, cyrusthevirus <root@127.0.0.1> wrote:
Il 26/05/2007 00:38, Mike Russell dixit:
"mikeN" <mikeyN@nospam.com> wrote in message
news:tt6dnfYdZ_5lwsrbRVnyiwA@bt.com...
Dropped my Nikon D70. Fortunately I had a uv filter on the end of the
lens and a lens cap on top of that. The result is the impact on a sharp
rock on the ground forced the lens cap through the uv filter, making a
hole in this filter a cm wide. The glass on the main lens itself is
unmarked!!
|
<snip>
| Quote: | On the contrary, if he had only the lens cap on the front, the shattered
glass
of the filter wouldn't have compromised his more expensive lens which was
further recessed and would have never been touched at all. No doubt the
shards
of that filter also flew into the front element scratching it and he can't
see
that damage yet or didn't look close enough.
This makes the perfect example of why a person should NEVER have a UV filter
on
any camera as a protective cover. Metal or plastic, yes. But a layer of
easy-to-shatter glass for protection? yeah right ...
|
Wow. That is some really bizarre logic. Guess what -- if he didn't have
the filter on, the lens cap would have still been shattered but instead
of driving it into the filter, it would have been driven into the front
element. If the front element wasn't broken by the rock and cap, it
would have been scratched or chipped (i.e. ruined). |
|
| Back to top |
|
|
THO
Guest
|
| Posted: Fri Jun 01, 2007 4:14 pm Post subject: Re: glass powder inside lens |
|
|
In article <qOydnc3fc6oFQcrbnZ2dnUVZ8qCqnZ2d@bt.com>,
"mikeN" <mikeyN@nospam.com> wrote:
| Quote: | Over the last year or so I had generally been leaving out the uv filters,
due to this idea that I had that they degraded the image sharpness (which I
think they might do, but I really had to make a serious effort to detect
this degradation). There was a bit too much uv around and so the uv filter
was on this time. From now on a protecting filter stays on!!!
|
During the last several years, I've been hearing an increased number of
postings online mention image degradation as a reason not to use lens
filters. Maybe I've missed them, but I haven't once seen any posted
examples showing how a UV or skylight filter degraded or ruined an image. |
|
| Back to top |
|
|
|
|
|
|
| |
Watched Topics
Search
Register
Log in to check your private messages
Profile
Log in
Memberlist
Usergroups