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My eyepiece can move in a circle. In some spots, all you see is black. In others you can focus on the slide. Any ideas on how to fix this problem. The base of the eye piece seems a little lose.

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Comone end has a cap on it, the other is blanked off. looking thro side viewer is black. I have no idea & no instructions so please can you help!


Remove the cap and put an eyepiece into the focuser on the side of the tube. Turn the focus knob until you get a sharp image. Do this in the daytime on a distant object like the top of a telephone pole.

Use the eyepiece with the largest number written on it until you learn how to focus properly.

Sep 19, 2011 | Magnacraft Optisan Telescope and...

1 Answer

We had the 20mm eye piece in and we turned the focus all the way clockwise so the eye piece was all the way in. We had the cover off, we had a very clear starry night, we live in the country, moved the...


First find a local Astronomy club -- the members will help you.

Second, you must first align the red dot finder with the main tube-- there are knobs on the side and bottom (usually) to move the red dot. Point the scope at the top of a telephone pole in the distance during the day time-- wget the top in the center of the eyepiece of the main tube. Without moving the main tube adjust the red dot so it points at the exact same spot.

Turning it all the way in or out is NOT how you focus-- there is a small "spot" when the eyepiece is in focus, and every other eyepiece must be refocused. Turn the knob slowly until the star or the moon comes to sharp focus.

Read my tips on my profile page.

www.telescopeman.org
www.telescopeman.us
www.telescopeman.info

Jul 04, 2011 | Celestron AstroMaster 114EQ (100 x 114mm)...

1 Answer

I cannot see anything from the viewer. it all appears black


Take the scope outside during the day time and practice focusing on a distant object. Use the eyepiece with the largest number written on it --- turn the focuser left and or right slowly until you get a sharp image. DO NOT use the 2 x barlow if you have one -- just the eyepiece. The higher the magnification the smaller the "sweet spot" is when focusing.

Jan 13, 2011 | Celestron NexStar 4 SE Telescope

2 Answers

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. :-)

Nov 27, 2009 | Vector Audubon 8x42 Binoculars

1 Answer

Only one spot on eyepiece in focus


This is a symptom of a cheap eyepiece-- see if you can find another eyepiece from a member of your local Astronomy club to test--- or buy one in about 20mm from this web site--

http://www.agenaastro.com/

Feb 21, 2009 | Meade DS-2114 ATS (325 x 114mm) Telescope

1 Answer

I have a WO IBIS 80 APO Spotting Scope. How do use it with other 1 1/4" eyepieces? The packaged zoom eyepiece seems to have a threaded attachment to the scope.


sounds like it was designed to use only the eyepiece that came with it. here is an idea...mount the scope on a tripod with no eyepiece in it...now take an 1 1/4" eyepice and place against the scope where you would put the eyepiece ..try to focus..if you cant, then slowly bring the eyepiece away from the scope till you see a sharp image..im sure a machine shop can make a sleeve to screw into your scope and hold 1 1/4" at that point.any questions i can answer call me larry@reichinstruments.com 5088331232

Nov 29, 2008 | Optics

3 Answers

Just black


Just a dumb question - but did you place the eyepiece in the focuser? Start with the largest - it has a wider field of view to get started.

May 04, 2008 | Meade DS-2114 ATS (325 x 114mm) Telescope

1 Answer

Poor viewing


You don't state if the collimation is a plain view through the back plate at the sky, or with an evepiece. The description that you gave suggests that that is a view through the telescope back without an eyepiece. The images in the Meade manual are at high power (200x) on either side of focus. What you want to see is circular rings around a star on either side of the best focus point. If the rings are not concentric, then the collimation is off. Other factors can affect the clairity of the image, such as dirt on the optics (need to be really bad to affect the image), or you may be using a poor quality eyepiece.

Jan 13, 2008 | Meade LX200GPS Telescope

1 Answer

ETX-90 Focus


I suggest trying a different eyepiece first to see if that's the problem. Otherwise, if it was moved without adequate protection, there is a chance the mirror was shifted or damaged. A damaged mirror can't really be fixed since it's specs are very rigid. If it turns out to be a problem with the mirror the best thing to do is find an expert on telescope mirrors to try and fix the problem.

Nov 12, 2007 | Meade ETX-90 (48x90 mm)

2 Answers

Tasco propoint PDP2 scope


Are you looking set the eye relief or the focus ring?

For eye relief you need to loosen the scope in the rings, mount the rifle to your shoulder with your standard hold and cheek weld. At this point, slide the scope back and forth in the rings until you obtain a full field of view. Tighten one of the rings slightly, dismount and remount the rifle several times to ensure correct adjustment. Level scope and tighten rings a final time.

For focus adjustment (remember that you are using the eyepiece to focus on the cross hair, not your target!) loosen the lock ring and turn the eyepiece until the cross hair is focused. It is best if you check it several times by closing and opening your eye several times. The crosshair should be instantly in focus. If your eye must adjust, then you need to refocus until the focus is instant.

The two dials on the scope are for adjusting the bullet point of impact. They will typically move POI 1/4 inch at 100 yards.

Nov 08, 2007 | Optics

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