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Posted on Sep 12, 2009

Lens are out of parallel. Both lens focus as normal but I have to shut on eye because only one is on target.

1 Related Answer

Anonymous

  • 6487 Answers
  • Posted on Jul 04, 2008

SOURCE: I have a Cannon 40D

What you can do is to get another sample, so see if that one focuses better in combination with your 40D.
What you can also do is to let Canon calibrate your 40D with both of your lenses.

Achieving focus is a task of both the lens ( the lens electronics decide on the steps the motor has to take, everytime the camera asks for a new "sample") and the camera (which is the one that judges the sample on focus by determining an increase or decrease in the contrast in the subject). So calibrating both the lenses and camera to work well together can increase AF performance a lot. Hope that helps......

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How to use a spotting scope for shooting?

A Spotting Scope is an essential element for hunters and shooters. This small device is technically a special type of telescope used for hunting, magnifying and watching an image or object more clearly. The methods use a shooting spotting scope does not involve much difficulty.

Here is the method:


Comfortable position

For a perfect shooting experience, you need a comfortable position. If your comfortable position is unable to help you fix the targeted area, you are likely to miss the hit or glance.

Attachment of the spotting scope with the tripod

Having an accurate view of the targeted area is important. Due to this reason, shooters need to position the spotting scope with a tripod so that they can see the targeted area very clearly and accurately.

Adjustment of the magnification level

The lens and magnification level should be adjusted so that you can get the appropriate view of the targeted area.

View of the targeted area

After fixing the targeted area, you have to adjust the magnification level with the lens to view the targeted area. At the time of using scopes, you will find some problems that magnification will present. If you fix the magnification and focus firstly, you may not find the target. You have to first view the target, and you have to adjust magnification level as required. Here, you should bear in mind you will have to go with the slow magnification process because the fast magnification process cannot give the accurate target.

Adjustment of the focus
You have to know how to reset the focus because you will need to do it again and again. It may sometimes harm your eyes with the magnification level being set to high.
Focusing on target is important for shooting and the spotting scope is also important for this purpose. For acquiring a specific target, it is important to use magnification level with the spotting scope.

You should follow all the methods of using explained above. There is no alternative way to learning how to use a spotting scope for shooting except these methods.
Apr 05, 2018 • Optics
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1answer

My Nikon DTM 410 makes a continuous clicking noise when it's turned on, like it's constantly trying to find a target to measure. Is this normal

Have you inadvertently selected continuous focus in the camera menu Set the lens to manual focus and see if it still happens
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3answers

If my left eye is the dominant one should I place the target more to the left or right?

It doesn't make a difference; you should try to train your eyes so the best thing is to keep both eyes open when shooting at a target.
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1answer

The right eye is blurey and dirty

Hello, clean the outside of the lens with a good optical cleaner. If you have, then trying adjusting the focus for each eye. Try both ends of this binocular at one eye at time; such as, left first, then the right eye until there are focused. That is if you can focus the optical end and they leave you with the eye lens for focus. Let me know how it works out. stewbsion
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1answer

All of a sudden every picture I take with the 55-200 zoom lens is blurry and slightly out of focus. Pictures with the 18-55 lens are still sharp. I have been using that 55-200 lens for years for sports...

Simplest answer is that you may have accidentally flipped the focus switch (A/M) on the lens to M. This turns off autofocus for that lens (which you might need to do if autofocus just can't resolve the image). Try turning it back to A.

Another possibility is that you're using an autofocus target different from the one you're expecting. The problem would be apparent regardless of lens choice, by being in focus in a different part of the image. You can press the arrow keys (while holding shutter release down halfway) to change AF targets, or change a menu setting to simply choose the closest target.

The shooting modes have no effect on focusing ability.

The camera would likely detect other focus-related problems (like servo failure).
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2answers

I bought the 10x25 camera binoculars and only one lens will focus using the center dial. Its almost like the other one needs to be focused at the eye piece itself. The pictures are not clear and are...

It is common for binoculars to have one independently focusable eyepiece.  If one eyepiece can be rotated, then that is the case.
If that is the case, focus through the one that DOES NOT rotate using the center control until you get a sharp image on that side.  Then rotate the eyepiece on the blurry side until the blurry side is sharp.  If you succeed at this, from henceforth the center control will focus both eyes adequately
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What are the adjustment knobs on the windage position for? Is it to adjust sighting or to focus the scope? Why are they not covered like most scopes are

The adj knobs on there are for windage on the right and elevation on the top, if they are not covered, they are turret knobs for target shooting, not for hunting. The focus knob is the rear lens, it spins in and out to fit your eyesight. It usually focus on the crosshairs and the distance for most shooters, some will not be able to get it right because of their eyes. 98% will. Hope this helps.
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Using the scope

Well if it was a rifle, I would say far away, or you will get a black eye. But the recoil on a pellet rifle is backwards because the spring jerks the rifle forward, and it messes with rifle scopes, they are made to recoil back, But,,, you have a movable eyepiece in the end where you look through and it will make the cross hairs come into focus for your eyes. some one else might find them blurry. The objective lens, should be in focus no matter what. It doesn't move. and no matter what your vision is, you should be able to see clearly. If not, I'm wondering if it is fogged up. Your eye should be about 3inches, + -, Check it out. Hope this helps.
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Seeing double when I look with both eyes. Out of

Step 1.
Adjust the eyepiece or both if both are adjustable back to zero. It should be printed on there. If it's not, then halfway. To find halfway turn them to one end, count the number of turns like 1 and a half turns for example, and then half that atnd turn it that ammount. You've now reset the binoculars to zero.

Step 2.
Now to focus. Pick your target that you want to look at thoguh your binoculars. Look through the binoculars and close the eye with the adjustable eyepiece or your right eye if both are eadjustable and focus the image on the left eye with the central focus knob. Once you've got it focused close the left eye, open the right eye and if it's not in focus adjust the EYEPIECE focus, not the central one, until it's in focus.
If you can't get it in focus because the eyepiece focus won't turn far enough in one direction, turn the OTHER eyepiece in the opposite direction at max, start the process again from step 2.

If it's all ok now you need to adjust the distance between the eyepieces. Open the binoculars as far as they go, look through the binoculars with both eyes on the target and move the binoculars inward slowly until you remove any black edges around the image, then move them very slowly inward until you see only one image.

If you've got more problems come back as ask. :-)
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1answer

I have a Bushnell DeepSpace Series telescope with 3 different power eye piece lens but I can barely see any at any distance

Put the eyepiece with the largest number written on it into the telescope. (This is the lowest magnification.)

DO NOT use the 2x barlow. Go outside during the day time and practice focusing on a distant object. The moon should be your first target at night.
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