Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-04-2013, 06:41 AM   #1
Junior Member




Join Date: Apr 2012
Posts: 36
Dirty Lens Elements

Recently picked up an SMC-M 50 1.2. No scratches whatsoever, very slight amount of fungus (appx. .5 mm) around the edge of an element. Otherwise, apeture leaves work wonderfully, smooth focus, a beautiful lens. One problem: The inner elements have a significant amount of dust. By significant, I mean visable to the naked eye when holding close wide open. Not sure how this will affect images, as I don't currently have a body to attach it to...planning on picking up a K-5 sometime soon. In any case, I do primarily portraiture (in mixed outdoor light usually) and want to use this lens! Can anyone point me to someone who can clean this lens up? I'd do it myself, but I have not a spanner nor the expertise to do so.

01-04-2013, 08:28 AM - 1 Like   #2
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,863
There is no M50/1.2. There is a K50/1.2 and an A50/1.2. But for the M series only the M50/1.4, M50/1.7 and M50/2.

If it is the M50/2 it isn't even worth worrying about, not that internal dust has any affect on image quality anyway.
01-04-2013, 08:38 AM   #3
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,735
You can get a good new one from KEH

Pentax Manual Focus Fixed Focal Length Lenses - KEH.com

for less than the cost of having your current one shipped to and cleaned by Eric:

Home
01-04-2013, 09:17 AM   #4
Junior Member




Join Date: Apr 2012
Posts: 36
Original Poster
Dirty Lens

Already posted this question, but no one seems to be responding in the other section. Have a 50 1.2 manual just purchased. Heavy dust on inner elements, and slight fungus on the outer rim of one of them. I'd really like to see this lens in new(er) shape. Anyone know where I can get it thoroughly cleaned in and out? (And possibly have the fungus-attacked element recoated?)

01-04-2013, 09:30 AM   #5
Moderator
Tom S.'s Avatar

Join Date: May 2008
Location: S.E. Michigan
Photos: Albums
Posts: 4,239
Since you are in the US, you can send it to Eric (do a search and you'll find contact info for him) to clean. It might take him a bit longer than usual since his wife recently passed away, but his work is rated top notch.

I did a quick search, link to Eric is in this thread.
01-04-2013, 09:34 AM   #6
Veteran Member
mrNewt's Avatar

Join Date: Nov 2011
Location: ON, RH
Posts: 2,170
pentaxs.com
01-04-2013, 12:08 PM   #7
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,695
The thread has been merged with the other thread of the same topic posted on the News and Rumours forum. This is the appropriate place to put the thread, the limited response you got is not because of the location of the thread. Thanks.
01-04-2013, 02:15 PM   #8
Pentaxian




Join Date: Nov 2011
Photos: Gallery | Albums
Posts: 3,735
QuoteOriginally posted by Tom S. Quote
link to Eric is in this thread.
Link to Eric is right here in this merged thread

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/210581-dirty-l...ml#post2227406

01-04-2013, 06:30 PM   #9
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,418
QuoteOriginally posted by jbennett1971 Quote
No scratches whatsoever, very slight amount of fungus (appx. .5 mm) around the edge of an element. Otherwise, apeture leaves work wonderfully, smooth focus, a beautiful lens.
Any lens with fungus and dirt inside is not a beautiful lens. A few dust particles inside a lens is usually without consequence. Fungus is another matter. It is a living thing and is difficult to eradicate. As noted above, better to buy clean optics (say from KEH) than to attempt to pay to have a lens refurbished. The possible exceptions are when the lens is very unusual or when you get it for free. If the lens was presented to you as in excellent condition and fungus free (always ask about fungus), I would return it to the seller.


Steve
01-04-2013, 07:04 PM   #10
Pentaxian
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 4,258
QuoteOriginally posted by boriscleto Quote
There is no M50/1.2. There is a K50/1.2 and an A50/1.2. But for the M series only the M50/1.4, M50/1.7 and M50/2.

If it is the M50/2 it isn't even worth worrying about, not that internal dust has any affect on image quality anyway.
Probably means 1:2 (colon between) as inscribed on the trim ring.
01-04-2013, 09:28 PM   #11
Junior Member




Join Date: Apr 2012
Posts: 36
Original Poster
I paid $20.00 for the lens. It isn't an f2, it is a 1.2, unless my
Eyes see a colon instead of a period...and this lens happens
to be larger and much heavier than a 1.4, lol. Not sure what series it is--
by "M", I was referring to manual aperture. I think it's worth saving.
01-04-2013, 09:34 PM   #12
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: Liverpool, NY
Photos: Gallery
Posts: 12,863
QuoteOriginally posted by jbennett1971 Quote
I paid $20.00 for the lens. It isn't an f2, it is a 1.2, unless my
Eyes see a colon instead of a period...and this lens happens
to be larger and much heavier than a 1.4, lol. Not sure what series it is--
by "M", I was referring to manual aperture. I think it's worth saving.
Pictures...
01-04-2013, 09:38 PM   #13
Junior Member




Join Date: Apr 2012
Posts: 36
Original Poster
Will do. I'm without a body right now, so I'll have to use my wife's Nikon tomorrow...look for some images tomorrow.
01-04-2013, 10:24 PM   #14
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,418
Ummm...if it is Pentax-K 50/1.2 for $20 then it may be worth sending it in for cleaning. This would be particularly true if it is cosmetically excellent. Both the "K" and "A" versions are highly desirable with the nod going to the earlier "K" version (does not say Pentax-A on the front). Just be sure that the smallest number on the aperture ring is "1.2"


Steve
01-05-2013, 01:19 PM   #15
Site Supporter
tabl10s's Avatar

Join Date: Jun 2011
Location: Sacramento(formerly from B'Ham, England).
Posts: 1,401
What filter size does it take?

Last edited by tabl10s; 01-10-2013 at 07:50 AM.
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!
amount, elements, 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
Lens issue - Dirty contacts?..... UpNorth Troubleshooting and Beginner Help 4 07-24-2012 06:30 PM
Is Adobe Photoshop Elements and Premiere Elements 10 worth $69 kwar Digital Processing, Software, and Printing 14 02-22-2012 08:00 PM
Dirty sensor or lens? fiveseven Photographic Technique 17 01-19-2011 09:52 AM
Dirty Sensor Or Dirty Lens? Orli Troubleshooting and Beginner Help 8 10-26-2009 03:35 AM
Dirty lens article emr General Talk 6 08-17-2009 04:31 PM



All times are GMT -7. The time now is 07:52 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