Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
10-02-2018, 11:40 PM   #16
Veteran Member
hcarvalhoalves's Avatar

Join Date: Aug 2010
Location: São Paulo, Brazil
Posts: 837
Thank you for the tips. I’m in Brazil so wasn’t sure how “Canadian balsam” was marketed here, found the resin using the name of the actual pine tree species though. Apparently it has many uses, just need to make sure to get of the pure/clear type.

01-16-2019, 06:26 PM   #17
Site Supporter
Site Supporter




Join Date: Feb 2009
Photos: Albums
Posts: 514
QuoteOriginally posted by MysteryOnion Quote
I hope the coating was not eaten away... that looks very bad.

Its been a long time since I opened my M50/1.4, but the last group should be in a holder that is threaded into the aperture assembly... outer ring hook spanner and sleeve?

You considered boiling the group apart?
Starting with a cold pan and acclimate the group to the water then slowly raise the temp. The groups should sit on a cloth or thick towel to no overheat. The glue may soften at 184 degrees, but you should have a pair of tongs that can grip the elements and exert some torque. Do not lift out of the hot water during this heating process or the temperature difference could shatter the elements. Patience is needed, this may not work the first time and require multiple sessions to get the glue to fail.
use paint remover

---------- Post added 01-17-2019 at 06:57 AM ----------

QuoteOriginally posted by hcarvalhoalves Quote
Thank you for the tips. I’m in Brazil so wasn’t sure how “Canadian balsam” was marketed here, found the resin using the name of the actual pine tree species though. Apparently it has many uses, just need to make sure to get of the pure/clear type.
tryusing without cementing it works, it centers as much as the other elements
01-17-2019, 07:41 PM   #18
New Member




Join Date: Jul 2017
Location: Penang
Posts: 12
Original Poster
QuoteOriginally posted by uttam.hathi Quote
use paint remover

---------- Post added 01-17-2019 at 06:57 AM ----------


tryusing without cementing it works, it centers as much as the other elements
yes, i'm using it now without any cementing, just that wide open at f1.4 a lot of flair, f2.8 to f5.6 is the sweet spots
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!
50mm, 50mm f1.4 lens, aperture, asahi pentax-m 50mm, balsam, balsam separation, center, cure, elements, f1.4 lens haze, fungus, glue, haze with balsam, k-mount, lens, pentax lens, pentax-m, pentax-m 50mm f1.4, press, slr lens, thanks, time, uv, water
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
When you have a balsam/cloud/fungus lens............ Kenneth3aracing Repairs and Warranty Service 4 11-29-2016 12:26 PM
Light haze - is the bargain second hand lens with haze worth it? awscreo Pentax SLR Lens Discussion 7 11-05-2016 12:56 PM
M-1.7 balsam separaion. SalPro Pentax SLR Lens Discussion 14 07-30-2016 03:01 PM
Suspected aperture lever misalignment on A-lens - easy fix? Ikarus Pentax SLR Lens Discussion 3 03-16-2014 04:15 PM



All times are GMT -7. The time now is 10:45 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