Diopter adjustment on scope?

ScottRiqui · October 9, 2012, 07:59 PM

Are there scopes that have diopter adjustment on the ocular lens?

I've recently started to need reading glasses - my far vision is great, but anything closer than about 18" away is a little blurry. The generic drugstore "+1.5" glasses work fine.

If I use my scope without the reading glasses, the crosshairs are blurry, to the point of being doubled. I'm not going to buy a new scope just to avoid wearing a $10 pair of glasses, but if there are adjustable scopes out there, I'll keep them in mind for future purchases.

rjrivero · October 9, 2012, 08:08 PM

Almost all scopes have a diopter adjustment in the ocular lense. I bet yours does too. The eye-piece probably has a (-) --- (+) kind of marking on it. When you turn the eye-piece it will act as a focus knob. A lot of scopes have a LOCK RING that you can snug down when the focal length is appropriate for you.

For Reference, this is a manual for a bushnell scope. It shows how to adjust the focus on the ocular lense and the lock ring for it.

ScottRiqui · October 9, 2012, 08:18 PM

Well I'll be darned - you're right! The scope is a cheap CenterPoint 4-16x, so I just assumed there wasn't any adjustment. There are no diopter markings on the ocular lens, and when I turned the end of it, I thought I was just spinning the flip-up lens cover on the tube. But I kept turning, and sure enough, the focus of the crosshairs eventually changed.

Thanks a bunch - now I don't have to worry if I forget to bring my reading glasses to the range.

rjrivero · October 9, 2012, 08:23 PM

Glad to help. Shoot strait!

October 9, 2012, 07:59 PM	#1
ScottRiqui Senior Member Join Date: January 27, 2010 Location: Norfolk, VA Posts: 2,905	Diopter adjustment on scope? Are there scopes that have diopter adjustment on the ocular lens? I've recently started to need reading glasses - my far vision is great, but anything closer than about 18" away is a little blurry. The generic drugstore "+1.5" glasses work fine. If I use my scope without the reading glasses, the crosshairs are blurry, to the point of being doubled. I'm not going to buy a new scope just to avoid wearing a $10 pair of glasses, but if there are adjustable scopes out there, I'll keep them in mind for future purchases.

October 9, 2012, 08:08 PM	#2
rjrivero Senior Member Join Date: November 17, 2008 Location: NW Ohio Posts: 1,399	Almost all scopes have a diopter adjustment in the ocular lense. I bet yours does too. The eye-piece probably has a (-) --- (+) kind of marking on it. When you turn the eye-piece it will act as a focus knob. A lot of scopes have a LOCK RING that you can snug down when the focal length is appropriate for you. For Reference, this is a manual for a bushnell scope. It shows how to adjust the focus on the ocular lense and the lock ring for it. Last edited by rjrivero; October 9, 2012 at 08:15 PM.

October 9, 2012, 08:23 PM	#4
rjrivero Senior Member Join Date: November 17, 2008 Location: NW Ohio Posts: 1,399	Glad to help. Shoot strait! Last edited by rjrivero; October 10, 2012 at 12:37 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

October 9, 2012, 08:18 PM	#3
ScottRiqui Senior Member Join Date: January 27, 2010 Location: Norfolk, VA Posts: 2,905	Well I'll be darned - you're right! The scope is a cheap CenterPoint 4-16x, so I just assumed there wasn't any adjustment. There are no diopter markings on the ocular lens, and when I turned the end of it, I thought I was just spinning the flip-up lens cover on the tube. But I kept turning, and sure enough, the focus of the crosshairs eventually changed. Thanks a bunch - now I don't have to worry if I forget to bring my reading glasses to the range.