Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-10-2019, 03:51 PM   #1
Forum Member
tonyzoc's Avatar

Join Date: Jul 2018
Posts: 62
Plastic white mounting alignment nub on M series

So this past few weeks I've picked up 2 M series zooms, the 40-80 and the 35-70. I got them both cheap...like $15 each and both were good glass, but both are missing the little plastic white nub. I can't image this is something I can buy so I'm looking for possible replacements. My first idea is to get a white plastic bead of the approximate diameter, somehow slice it in two, and glue it in place. Has anyone else ever replaced this part and have any better ideas?



06-10-2019, 08:04 PM   #2
Moderator
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 6,006
You have the right idea. It's even easier replacing the red bead on Minolta lenses because you don't have to cut the bead. Try an arts and crafts store like Michaels.
06-11-2019, 12:02 AM   #3
Senior Member




Join Date: Jan 2018
Posts: 230
QuoteOriginally posted by tonyzoc Quote
My first idea is to get a white plastic bead of the approximate diameter, somehow slice it in two, and glue it in place. Has anyone else ever replaced this part and have any better ideas?
I think it would be rather easier to buy two beads and sand or file them down (plus a couple for practise) rather than struggling to cut one small bead in half
06-11-2019, 04:59 AM   #4
Pentaxian
bdery's Avatar

Join Date: Mar 2008
Location: Quebec city, Canada
Photos: Gallery
Posts: 6,588
QuoteOriginally posted by tonyzoc Quote
but both are missing the little plastic white nub. I can't image this is something I can buy so I'm looking for possible replacements. My first idea is to get a white plastic bead of the approximate diameter, somehow slice it in two, and glue it in place. Has anyone else ever replaced this part and have any better ideas?
Beads can be a good idea, or just some Sugru if you don't mind a more matte finish.

06-18-2019, 03:17 AM   #5
Veteran Member
bassek's Avatar

Join Date: Feb 2011
Photos: Gallery
Posts: 644
Beware!

There is a hole under the nub on some lenses. Put a piece of sticker on the hole before adding glue and new bead to avoid having glue inside lens...

Seb
06-30-2019, 06:33 PM   #6
Forum Member
tonyzoc's Avatar

Join Date: Jul 2018
Posts: 62
Original Poster
I was able to get some beads but cutting or filing them in half turned out to be easier said then done. After telling my wife about this she told me half beads were available and are used in crafts to be glued down...perfect. so the 3mm was too small...the 5mm too big. I now have 400 4mm half beads coming that I got from China for 99 cents shipped. Anyone need any



---------- Post added 06-30-19 at 06:37 PM ----------

QuoteOriginally posted by bassek Quote
Beware!

There is a hole under the nub on some lenses. Put a piece of sticker on the hole before adding glue and new bead to avoid having glue inside lens...

Seb
Good idea...I had this though as I was worried about epoxy getting into the hole and sticking to the barrel beneath...so I'm sliding a piece of thin plastic under the edge and pull it out after drying...assuming I have access ...else as you said.
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!
alignment nub, beads, glue, half, hole, k-mount, pentax lens, piece, plastic, series, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Landscape Perfect Alignment AZGMDale Post Your Photos! 10 11-28-2018 09:00 AM
Vivitar Series 1 (Version 1 - Kiron 22xxxx) 70-210mm f/3.5 Mounting Issue Beetle B. Pentax SLR Lens Discussion 5 05-20-2018 04:11 AM
Night Planetary Alignment DeadJohn Post Your Photos! 3 03-20-2018 12:15 AM
Pentax Da35mm 2.4 plastic lens vs Da 50mm 1.8 plastic lens fevbusch Pentax SLR Lens Discussion 24 01-26-2014 06:49 PM



All times are GMT -7. The time now is 01:32 AM. | 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