what's a zero diopter dot
- Thread starter vdub
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doggin coyotes
Well-known member
Might be dried fly poop. See if it'll wash off.
CatShooter
New member
Originally Posted By: vdubI just bought a Nikon 4-12x40 and what is a 0 (Zero) Diopter Dot. Is it just for keeping the eyepiece in check.
It is the position for people that do not need glasses to see far distances. The "+" and "-" are reference points so you can come back to your setting if the eye piece gets moved.
It is the position for people that do not need glasses to see far distances. The "+" and "-" are reference points so you can come back to your setting if the eye piece gets moved.
CatShooter
New member
Originally Posted By: vdub
That makes sense thanks.
Diopters are an optical measurement - and they are the inverse of the optical measurement of focal length, and it is based in meters.
One diopter is one meter (39.4").
2 dopters is 1/2 meter, 10 diopters is 1/10 of a meter.
So, if you are far sighted and need thick lenses, your glasses will be in "+" diopters - if you are near sighted, your glasses will be inn "-" diopters.
Diopters is also the way close up lenses for cameras are measured. A 2 diopter closeup lens will focus at 20" (1/2 of a meter) when the camera lens is at infinity. A 10 diopter closeup lens will focus at 4".
If you wear a +2 eye glass prescription, then setting the scope eye piece to +2 will allow you to see fine without fooling around with it (assuming that the scope maker calibrated his eyepieces properly).
I hope that makes your day
That makes sense thanks.
Diopters are an optical measurement - and they are the inverse of the optical measurement of focal length, and it is based in meters.
One diopter is one meter (39.4").
2 dopters is 1/2 meter, 10 diopters is 1/10 of a meter.
So, if you are far sighted and need thick lenses, your glasses will be in "+" diopters - if you are near sighted, your glasses will be inn "-" diopters.
Diopters is also the way close up lenses for cameras are measured. A 2 diopter closeup lens will focus at 20" (1/2 of a meter) when the camera lens is at infinity. A 10 diopter closeup lens will focus at 4".
If you wear a +2 eye glass prescription, then setting the scope eye piece to +2 will allow you to see fine without fooling around with it (assuming that the scope maker calibrated his eyepieces properly).
I hope that makes your day
Colorado Coyotes
New member
Originally Posted By: CatShooterOriginally Posted By: vdub
That makes sense thanks.
Diopters are an optical measurement - and they are the inverse of the optical measurement of focal length, and it is based in meters.
One diopter is one meter (39.4").
2 dopters is 1/2 meter, 10 diopters is 1/10 of a meter.
So, if you are far sighted and need thick lenses, your glasses will be in "+" diopters - if you are near sighted, your glasses will be inn "-" diopters.
Diopters is also the way close up lenses for cameras are measured. A 2 diopter closeup lens will focus at 20" (1/2 of a meter) when the camera lens is at infinity. A 10 diopter closeup lens will focus at 4".
If you wear a +2 eye glass prescription, then setting the scope eye piece to +2 will allow you to see fine without fooling around with it (assuming that the scope maker calibrated his eyepieces properly).
I hope that makes your day
That made my head hurt, guess I need to focus.
That makes sense thanks.
Diopters are an optical measurement - and they are the inverse of the optical measurement of focal length, and it is based in meters.
One diopter is one meter (39.4").
2 dopters is 1/2 meter, 10 diopters is 1/10 of a meter.
So, if you are far sighted and need thick lenses, your glasses will be in "+" diopters - if you are near sighted, your glasses will be inn "-" diopters.
Diopters is also the way close up lenses for cameras are measured. A 2 diopter closeup lens will focus at 20" (1/2 of a meter) when the camera lens is at infinity. A 10 diopter closeup lens will focus at 4".
If you wear a +2 eye glass prescription, then setting the scope eye piece to +2 will allow you to see fine without fooling around with it (assuming that the scope maker calibrated his eyepieces properly).
I hope that makes your day
That made my head hurt, guess I need to focus.