Lyman Perma Center 25x Little help needed

Good possibility there is a lock ring ahead of the parallax adjustment ring. Loosen it first.

50 yards. Try it once the lock ring is loose.
 
If it turns out that it's just hard to turn you might try warming it up a bit with a heating pad. Otherwise, it's just old and needs professional help. I don't know for certain, but will say that the scope will focus at 50 yards...seem to remember some of those being used in rimfire matches but not sure of anything these days. The only thing I am sure of is that I'm generally unsure.
 
If it is difficult to turn, but does, that might be a good thing. The objective is firm and tight.

I have never had one of those apart, most scopes have some type of O Ring that allows the objective to be firm in adjustment and stable.

I would not mess with it if it is holding POA and focuses fine.
 
I am fortunate to have 2 of these scopes, a 20 and a 25. Yes they will focus at less than 50 yards. As was mentioned above be certain the lock ring is loose before attempting to focus. They are a pain to focus, actually but once done its done. One more point is the lock ring itself will change the focus so it is a back and forth action to obtain best focus. Ignore the yardage marks, they are essentially meaningless at close distance. bob
 
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Lyman scope

bob finger said:
I am fortunate to have 2 of these scopes, a 20 and a 25. Yes they will focus at less than 50 yards. As was mentioned above be certain the lock ring is loose before attempting to focus. They are a pain to focus, actually but once done its done. One more point is the lock ring itself will change the focus so it is a back and forth action to obtain best focus. Ignore the yardage marks, they are essentially meaningless at close distance. bob
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Bob ,why does the parallax change with the lock ring ? I have two 25x and they work the same way ? The A O has about 720* rotation so it can take a minute to setup the first time. They do have decent glass for their age.
 
I don't know the answer to why the lock ring changes focus. I just know it does. These are bullet proof old scopes so it is only a minor inconvenience, especially for me since I use them only at 50 yards. Once and done. bob
 
redrockranger said:
Bob ,why does the parallax change with the lock ring ? I have two 25x and they work the same way ? The A O has about 720* rotation so it can take a minute to setup the first time. They do have decent glass for their age.
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DITTO - make certain that the lock-ring is loose before turning the objective!:eek:

From the ocular/turret end, the objective lens-cell, is "pushed" away from you, as it is turned clock-wise, thus, simply tightening the lock-ring should have no effect on the focus: the stop-shoulder is in constant contact against the lens-cell.

However, as the objective is turned toward the turrets, or, counter-clock-wise from the ocular end, the stop-shoulder moves rearward, leaving both the lens-cell and the lock-ring behind: tightening the lock-ring, then, pushes the lens-cell rearward, until, once again, you feel it secured against the stop-shoulder.

I always move mine too far toward the turrets - mess with it, and you'll soon learn how far - then, push the objective away, as it saves messing around going both directions.:p For their era, the Lyman optics were TOP NOTCH. :cool: RG
 
My Unertl was kinda that way. It had something that was called lense seperation. Had it repaired and now works fine.
 
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