Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-06-2015, 09:30 PM   #1
New Member




Join Date: Jun 2015
Posts: 2
Helios 44m-2 won't focus to infinity.

A while back I bought a Helios 44m-2 58mm f2 on ebay. Upon using this lens I found that I was unable to focus to infinity. The focus ring would turn all the way to the infinity marking the lens isn't even close to the point of infinity. Is this an issue with this lens or something can can be fixed?

12-06-2015, 10:01 PM   #2
New Member




Join Date: Apr 2013
Location: Taipei,Taiwan
Photos: Gallery
Posts: 9
It is an issue of the lens, I have a similar one works fine.
12-06-2015, 11:38 PM   #3
GUB
Loyal Site Supporter
GUB's Avatar

Join Date: Aug 2012
Location: Wanganui
Photos: Gallery | Albums
Posts: 2,552
QuoteOriginally posted by Scuddle Quote
A while back I bought a Helios 44m-2 58mm f2 on ebay. Upon using this lens I found that I was unable to focus to infinity. The focus ring would turn all the way to the infinity marking the lens isn't even close to the point of infinity. Is this an issue with this lens or something can can be fixed?
What type of adapter are you using?
There is a non infinity adapter and one that goes to infinity.
The non infinity has a flange between the lens and the body and a slot to locate the mounting pin on the body.
The infinity has no flange and a little spring loaded tab on its hub. Also has a tool to take it off the body.
12-07-2015, 12:44 AM   #4
New Member




Join Date: Apr 2013
Location: Taipei,Taiwan
Photos: Gallery
Posts: 9
Sorry, I check my lens, it is Zenith Helios with Pentax bayonet, it fits well.

12-07-2015, 08:16 AM   #5
Pentaxian
dcshooter's Avatar

Join Date: Jan 2011
Location: Washington DC
Photos: Gallery | Albums
Posts: 4,608
These lenses do not have adjustable infinity and instead use a series of thin washers between the front and back halves of the lens in order to set infinity focus. If you bought it from one of hte eastern european sellers, they frequently pull apart the lens to do a very quick and messy relube and often don't put the correct washer back in. In your case, it seems like they put one in that is too thick.

If you screw the two halves of the lens apart, you shold be able to remove the washer that is in there, which will probably allow it to focus past infinity, so that's the quickest work around. If you want to get the lens dead on, you will want to sand the washer down a little bit at a time, re-attach the lens, and test, repeating the procedure until it is completely correct. The other, issue, though, is this will affect the orientation of the lens on the mount when you mount it. This can be adjusted at the rear of the lens byt loosening a tiny set screw on the mount and turning it until it is at the correct position when mounted, then re-tightening it. The trick here is that on some samples of this lens, you can get to the set screw without disassembling the rear, while on others, you have to remove the focus ring to get enough access.
12-08-2015, 12:25 AM   #6
New Member




Join Date: Jun 2015
Posts: 2
Original Poster
QuoteOriginally posted by dcshooter Quote
These lenses do not have adjustable infinity and instead use a series of thin washers between the front and back halves of the lens in order to set infinity focus. If you bought it from one of hte eastern european sellers, they frequently pull apart the lens to do a very quick and messy relube and often don't put the correct washer back in. In your case, it seems like they put one in that is too thick.

If you screw the two halves of the lens apart, you shold be able to remove the washer that is in there, which will probably allow it to focus past infinity, so that's the quickest work around. If you want to get the lens dead on, you will want to sand the washer down a little bit at a time, re-attach the lens, and test, repeating the procedure until it is completely correct. The other, issue, though, is this will affect the orientation of the lens on the mount when you mount it. This can be adjusted at the rear of the lens byt loosening a tiny set screw on the mount and turning it until it is at the correct position when mounted, then re-tightening it. The trick here is that on some samples of this lens, you can get to the set screw without disassembling the rear, while on others, you have to remove the focus ring to get enough access.
I looked up some videos to guide me through disassembling the lens and while I was able to successfully screw off the back element I was unable to unscrew the two maim halves of the lens. I have tried for a while now with no luck.
10-12-2017, 05:49 AM   #7
Forum Member




Join Date: Apr 2015
Location: Italy
Posts: 64
Hello just got a Helios 44M and though I am using the original Pentax adapter I have no infinity focus and the maximum focus distance I get is circa six feet.
Have I been screwed - sorry, could't resist the pun - or what?
10-12-2017, 06:41 AM - 1 Like   #8
Pentaxian
dcshooter's Avatar

Join Date: Jan 2011
Location: Washington DC
Photos: Gallery | Albums
Posts: 4,608
QuoteOriginally posted by talgarik Quote
Hello just got a Helios 44M and though I am using the original Pentax adapter I have no infinity focus and the maximum focus distance I get is circa six feet.
Have I been screwed - sorry, could't resist the pun - or what?
If you aren't afraid of minor surgery, the 44m, unlike the 44-2, has adjustable infinity. There are 3 tiny screws on the outside of the focus ring that hold it to the inner focusing mechanism. Turn the ring to infinity, loosen the screws, and turn the lens back to around 6 feet/2 meters and retighten them. Focus to infinity again, put the lens on a camera on a tripod on live view (magnified) and focus on a distant object to see how close you are. Loosen the screws and move the ring again to fine tune as needed.

Note: you might want to apply a dab of acetone or other solvent ot the heads of the screws before attempting to turn them since they might have threadlocker on them, and it is easy to strip them out. Try to find a screwdriver bit that matches the size of the slot as closely as possible.

Here's an image I found showing the screws:


source: https://simonhawketts.com/2014/06/14/helios-44m-focus-thread-cleanup/#jp-carousel-5074

10-12-2017, 09:20 AM   #9
Forum Member




Join Date: Apr 2015
Location: Italy
Posts: 64
thank you dcshooter! now I need to find the right screwdriver but it sounds feasible
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!
44m-2 won't focus, camera, focus, helios, helios 44m-2, infinity, lens, pentax help, photography, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
18-135mm WR won't focus to infinity? 12345 Pentax DSLR Discussion 10 07-20-2015 08:21 PM
80-320mm won't focus to infinity akptc Troubleshooting and Beginner Help 5 12-14-2012 08:46 AM
A 50mm /1.2 won't focus to infinity RXrenesis8 Troubleshooting and Beginner Help 46 07-22-2011 10:11 AM
Helios 44m-7 can't infinity focus. Fixable??? mrjamesabels Troubleshooting and Beginner Help 4 06-04-2010 12:48 PM
PK mount Makinon won't focus to infinity ChildOfVision Pentax SLR Lens Discussion 6 08-16-2009 04:58 PM



All times are GMT -7. The time now is 03:57 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