Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-27-2007, 10:50 AM   #1
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Cleaning the glass

i've got a tamron SP 2x teleconverter. it had haze that did not look like fungus. i dismantled it and i've got all the glass clean and clear except for one lens. this lens is still foggy after several tries at cleaning with alcohol and acetone. it seems like the glass itself is foggy. does anyone know what the problem is?

08-27-2007, 10:53 AM   #2
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,713
I wonder if it was designed that way for a reason.

Have you tried using it Roy?
My guess is that it still takes decent pictures
08-27-2007, 11:06 AM   #3
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Original Poster
QuoteOriginally posted by little laker Quote
I wonder if it was designed that way for a reason.
NO WAY
Have you tried using it Roy?
No i don't want to till it's clean. i'd have nothing to compare it to ..
My guess is that it still takes decent pictures
.................................
08-27-2007, 01:09 PM   #4
Veteran Member
Ben_Edict's Avatar

Join Date: Jul 2007
Location: SouthWest "Regio"
Photos: Albums
Posts: 3,303
I have had good results cleaning lenses with a simple window cleaning agent (one of these pump action bottles). Just try to find one with as few as possible add-on chemicals (colours, flavourings etc.) - a good bet is a "green" product. After that I usually rinse it in water and dry it an then it gets a final wipe down with Eclipse. So far this cleaning action removed anything from lenses, including fungus. If the fogging is not really in the glass, but on the outside, it should work.

Ben

08-27-2007, 01:24 PM   #5
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Original Poster
ben,
thanks but i've tried that also. trying something new now.
08-27-2007, 01:32 PM   #6
Veteran Member
borno's Avatar

Join Date: Nov 2006
Location: md-usa
Photos: Gallery | Albums
Posts: 2,580
Hey roy, I have had luck with methanol on a hazy vivitar then again if it is the cement between 2 elements that is hazy I don't know what to do then. good luck.
08-27-2007, 01:43 PM   #7
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Original Poster
i've used denatured alchohol and eclipse. i think that's methanol.
08-30-2007, 04:59 PM   #8
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Original Poster
lemon pledge!!! i'll post more about it tomorrow. simply amazing!!

09-02-2007, 09:28 PM   #9
Veteran Member
Mechan1k's Avatar

Join Date: Jun 2007
Location: Sydney, Australia
Posts: 2,883
QuoteOriginally posted by roy Quote
lemon pledge!!! i'll post more about it tomorrow. simply amazing!!
As in the "timber" flooring cleaning/polishing product???
If so ... that's good to know.
09-03-2007, 06:40 AM   #10
Veteran Member
Tom Lusk's Avatar

Join Date: Sep 2006
Photos: Gallery
Posts: 972
lemon pledge???

Seriously?

Tell me more...
09-03-2007, 12:52 PM   #11
Inactive Account




Join Date: Aug 2007
Location: Anaheim, CA
Posts: 5
Cleaning the Glass

To clean my lenses, I use bone or lamp black - absolutely dry - after brushing with a soft brush. I bought a small bottle years ago from a calligraphy store (pure, ultra fine carbon - used to make ink). I dab some on lens paper or pick some up with a que tip and work it softly in little circles. I only do this outside, as spilled pure carbon is a pain in the arse. This is actually the old time way to clean lenses.

Be sure that the "cloudiness" is not cloudy glue between a doublet group. If it is, I remedied it once years ago by boiling the doublet to melt the glue and separate the glass. Cleaned the glass thoroughly, and reglued with a dot of Canadian balsam - there's an art to this. I believe they now use "optical glues" though...
09-03-2007, 04:47 PM   #12
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
Original Poster
QuoteOriginally posted by Tom Lusk Quote
Seriously?

Tell me more...
sorry for the delay but i forgot. this is a tip i got about this. i was also told that just about any product similar will work. also i can re polish the lens with cerium oxide but you have to make sure you polish the entire lens the same amount. the lemon pledge works ESPECIALLY on my eye glasses.

I have a suggestion you might consider. Try spraying the etched
glass with "Lemon Pledge" and very lightly polish it off. An oculist
many years ago recommended that to me in lieu of the various (usually
unsuccessful) resin coatings touted to fill tiny scratches and other
surface imperfections on eyeglasses. He said that he used it
routinely on fine optical surfaces. I have been using it on my
eyeglasses regularly for perhaps 20 years and on filters for the last
several years. If it doesn't fix the problem, it washes off with
soap and water or isopropyl alcohol and you haven't risked anything.
09-03-2007, 05:33 PM   #13
Veteran Member




Join Date: Jun 2007
Location: Buffalo/Rochester, NY
Photos: Albums
Posts: 1,133
Although it sounds like a simple solution, I wonder how long it will last.

After all, the Pledge folks claim you have to use it every time you dust, so obviously it doesn't last forever
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
glass, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fungus cleaning in OZ buzzvic Pentax SLR Lens Discussion 5 10-20-2009 07:03 AM
Sensor cleaning? seacapt Troubleshooting and Beginner Help 7 04-16-2009 11:27 AM
K10D Cleaning EAD Studios Pentax DSLR Discussion 2 08-26-2008 06:57 AM
Pentax glass versus 3rd Party Glass??? rdrum76 Pentax SLR Lens Discussion 1 11-04-2007 04:02 PM
Autumn colors - old glass is a good glass andrei46 Post Your Photos! 5 10-26-2007 09:35 AM



All times are GMT -7. The time now is 02:05 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top