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Old August 24, 2019, 16:35   #1
meltblown
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Scope Question: What exactly does being able to adjust the eyepiece do?

Dum question. I turn the +/- thingy on a scope at the eyepiece and really have no clue if there is really a difference. Been in this world a decent amount of years and had a bunch of scopes but would like to know what's the deal. TIA
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Old August 24, 2019, 17:13   #2
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Essentially it is to bring the reticle in focus it for your eye. Once the scope is mounted so you have the correct eye relief you should use this adjustment to make the reticle look clear and sharp to you.
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Old August 24, 2019, 18:05   #3
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Originally Posted by Andy the Aussie View Post
Essentially it is to bring the reticle in focus it for your eye. Once the scope is mounted so you have the correct eye relief you should use this adjustment to make the reticle look clear and sharp to you.
I thought so but I just don't really notice a change. No worries so it's basically useless?
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Old August 24, 2019, 18:23   #4
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Quote:
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No worries so it's basically useless?
....can't comment on the optics you are using but it's certainly not useless on those I am. I can see a distinct chance in the focus of the the reticle in pretty much all my optics. How are your eyes ?
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Old August 24, 2019, 19:19   #5
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Pat, have you tried adjusting that ring while looking at something printed, like a sign or license plate? Might help; usually what I do with one.
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Old August 24, 2019, 21:26   #6
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Look at the sky through the scope.
Look at the sky outside the scope and then drop your eyes to look through the scope.
The reticle should be sharp and clear, instantly.
Adjust accordingly.
Sometimes it can take complete revolutions of adjustment +/-...
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Old August 24, 2019, 22:28   #7
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Certainly not useless. As said, it allows the individual to focus the reticle to their eye. In the case of my recent range finder the readout and the image won't focus at the same time. Twist the eye piece and either the image or the readout is in focus, not both at the same time. Bugs me.
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Old August 25, 2019, 08:13   #8
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Definitely not useless. I focus on a sign at least 50 yes. away and adjust so the lettering and reticle are as close to perfectly clear as they can be - works real well in practice.
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Old August 25, 2019, 08:45   #9
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Ive always found that I need to look quickly through a scope and then look away, before my eyes try to 'fix' the scopes reticule/view focus.
It usually takes me a while to get them where their both in focus for me,,,,and to tell you the truth, im not sure it has ever really matered all that much on anything besides my bench rest rifles....
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Old August 25, 2019, 09:05   #10
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I always adjust the focus ring to my eyes.
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Old August 25, 2019, 11:28   #11
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Quote:
Originally Posted by RG Coburn View Post
I always adjust the focus ring to my eyes.
As do I...

I can't imagine a scope without this focusing ability.

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Old August 25, 2019, 12:13   #12
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My take is that the +/- adjustment is so you can adjust the scope into focus so you can shoot it without requiring your glasses to get a clear image.
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Old August 25, 2019, 15:38   #13
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So, are we sharpening the cross hairs or the objective/target? I wear glasses and am far sighted. I've probably noticed it a little, but it's not one of those Eureka! moments when I adjust them. Even on a 60x spotting scope.

Damn budget AR is getting out of hand already after looking at the cost of a decent scope mount and light weight free float. Wish I could find someone getting rid of a Larue LT104 for a good price.
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Old August 25, 2019, 16:17   #14
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If you are only turning it slightly left or right, you are not adjusting enough. it usually takes a complete rotation or rotations.
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Old August 25, 2019, 16:32   #15
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Quote:
Originally Posted by Tex View Post
If you are only turning it slightly left or right, you are not adjusting enough. it usually takes a complete rotation or rotations.
All I notice is that it gets closer to my eye
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Old August 25, 2019, 17:01   #16
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Quote:
Originally Posted by meltblown View Post
So, are we sharpening the cross hairs or the objective/target? .
Ocular bell adjustment is for clarity of the reticle.

Objective bell adjustment ( if your scope has it ) is for clarity of target at a given distance.



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Old August 25, 2019, 17:07   #17
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Quote:
Originally Posted by tdb59 View Post
Ocular bell adjustment is for clarity of the reticle.

Objective bell adjustment ( if your scope has it ) is for clarity of target at a given distance.



....................
That makes sense. I thought it was to make the target focus better. I can't see a difference
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Old August 25, 2019, 20:20   #18
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Using anything other than a blank wall or the cloudless sky kind of defeats the purpose of the focus ring. That is because your eye automatically goes into focus mode and adjusts so you get a good picture that the brain can then embellish to make it a "perfect" picture. By looking at the sky, you are eliminating anything for your eye to focus on except the reticles. By turning the adjuster, you then mechanically change the focus to sharpen the view. If you have non-corrected vision, then the adjustment may not do anything but cause the reticles to get blurry.

Once I get mine set, I take a marker and make a mark across both the ring and scope body to show if the focus has been changed.
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Old August 25, 2019, 20:37   #19
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Quote:
Originally Posted by tdb59 View Post
Ocular bell adjustment is for clarity of the reticle.

Objective bell adjustment ( if your scope has it ) is for clarity of target at a given distance.



....................

^^^This. Ocular focus is NOT intended to replace corrective lenses (or contact lenses) should you need them.

And yes, focus the ocular lens while looking at a blank (white) wall or cloudless sky.

FWIW. The focus ring found on one lens in a binocular is intended to "balance" the focus, for the user, in the right and left eye.
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Old September 01, 2019, 20:59   #20
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I find that it helps focus the reticle as well as the target. It seems to get more pronounced as my eyes age.

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Old September 01, 2019, 21:10   #21
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I really don't notice a difference.
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