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09-30-2011, 01:08 PM   #1
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Helios 44M-4 needs your help...

Hopefully some one will have an answer for my problem. I bought a Helios 44M-4 from a local member hoping that it would match or excel my Helios 44-3. Put the genuine pentax M42 adapter and tried. Got no focus and very blurred picture. Something told that it could be the lens register distance problem. Then I tried it with a #2 Takumar M42 adapter ring and voila, the image became clear and I was able to adjust the focus. The owner told me that nodoy did anything and the lens looks like new. I bought this under the assumption that it would work just by screwing it in the M42 adapter. What I am I missing? Does this model has limitations with the M42 mount? My 44-3 never had this issue and it takes beautiful pictures. Any ideas? Thank You.

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09-30-2011, 01:42 PM   #2
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Hi, it seems that what you got there is actually an extension tube. That is something usually used for macro photography. It unscrews itself. The reason why you got "no focus" is that there was no object close enough.
09-30-2011, 01:47 PM   #3
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Thanks your reply. That extension tube (#2) is the one I put it on in order to get it in focus. Without that tube, everything looks blurry.
09-30-2011, 03:53 PM   #4
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I have a few M44 lenses and have dismantled and cleaned them all, there is a little room for adjusting the infinity
focus but nowhere near that amount !
If you were fitting it on to a 4/3 or mirrorless camera it would make sense.
Could be the lens was worked on and an element is in the wrong place or the front glass could be from a 90 or 100mm lens and not the 58mm original.
The front glass is the one that designates the focal length the others are just for correction.

09-30-2011, 04:04 PM   #5
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I have an older 44-2 and it focuses fine so would imagine yours should.

Maybe the lens has been taken apart at some point (probably not that uncommon) but put back together with a spacer in wrong place or something?
09-30-2011, 04:15 PM   #6
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I had the same lens and it focused fine. Btw they are quite easy to take down, maybe some one has done it before and while remounting it, mess the focusing ramp. If I am not mistaken, it's easy to mess those helicoidal stuff.
09-30-2011, 04:15 PM   #7
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Well here's what I would do.
Unscrew the lens from the camera.
Unscrew the extension tube from the lens.
Take the other (good) lens and focus it to 0.55 meters.
Take a ruler and measure the distance between the rear element's edge and the thread mount's edge.
Note that distance.
Now take the other (bad) lens and do the same thing with it.
If the distances do not coincide then infinity focus must be adjusted.
If they do coincide, something else is going on, but at least you ruled out one possible cause.
In respect to the lens elements being assembled wrong, I'm not sure that's possible, and the front element replaced with another is unlikely, because it should have the same diameter in the first place. Disassembly by itself is not difficult, it's just that I wouldn't proceed to it yet.
09-30-2011, 05:17 PM   #8
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Thanks to all. I will try disassembling the lens during this weekend and let you know.

10-02-2011, 12:45 PM   #9
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I have the very similar 44M and have used the 44M-4 and there should be no problem adapting with the standard Pentax adapter. I would suggest that you ask for your money back.


Last edited by stevebrot; 10-03-2011 at 10:26 PM.

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