Guide :Optics : LX200GPS Telescope

Poor viewing I have a 10" lx200 gps, and I can't see things like detail on mars or jupiter, I can see the rings on saturn, but not the cassini division, When I do the collimation test as described in the manual I see the dark black circle (secondary mirror) and a wide bright bigger circle caused by the star, this light is solid and is the same distance in each direction, not the lines that they show in the manual. any ideas John

Posted by bigred20 on Jan 13, 2008

Research, Knowledge and Information :

LX200 ACF Manual -

Black & Decker Bosch Emerson HP JVC Miele Motorola Panasonic Philips Samsung Sharp Siemens Sony Whirlpool ... LX200 ACF Manual ...
Read More At :

Skye Scope May 2012 | Stars | Black Hole

west zonal winds during the last Saturn year show that they ... in the distance. I can’t remember when I last ... Mars Jupiter Saturn Uranus Neptune Pluto
Read More At :

LX200GPS Manual | Lens (Optics) | Tripod (Photography)

... It is recommended that you do not attempt a GPS fix indoors. See ... If you do not wish to have "Black ... of the secondary mirror housing. the dark central ...
Read More At :

did we buy a lemon?? - Google Groups

... it sounds for all the world like you didn't have Jupiter in ... I see?) the Cassini division in Saturn's rings. ... blocked from the secondary mirror and its ...
Read More At :

Weasner's General Feedback Page

This would be an option with me. I also have a LX200 GPS 10 inch for my deep sky viewing. Regards, Bill Griswold ... Mike here: Sounds like a good deal.
Read More At :

Calaméo - Ol'Optic : Catalogue Meade 2008 en Anglais

Goals: See Saturn’s rings, Jupiter’s ... moon/etx-90chuckreese/mars/lx200 What can you see? ... deep sky objects in amazing detail. Not for land viewing ...
Read More At :

Telescope Minireview.. lots of em'! - BizLand

... very clear view on Saturn with the dark shadow of the rings black as can ... wide Cassini division, plenty of detail on Jupiter, ... like to see the ...
Read More At :

Sky and Telescope April 2011 by Eduardo Ojero-Pascual - issuu

... Sky and Telescope ... search for giant planets like Jupiter and Saturn, they offer favorable hunting ... dark skies I can see M96 in my 10 ...
Read More At :

Sky & telescope australian may 2014 by sangsangsau - issuu

... Sky & telescope australian may ... WHAT WE DON’T LIKE: Obstructed GPS antenna (see ... bordering the black shadow cast on the rings by Saturn’s ...
Read More At :

Observer - Geocities Archive / Geocities Mirror

Jupiter, Saturn, Mars, Zeta Cancri, ... Cassini's division, though not tack sharp, ... After awhile I heard Ralph begin sub-vocalizing phrases like "I see it", ...
Read More At :

Suggested Questions And Answer :

Poor viewing I have a 10" lx200 gps, and I can't see things like detail on mars or jupiter, I can see the rings on saturn, but not the cassini division, When I do the collimation test as described in the manual I see the dark black circle (secondary mirror) and a wide bright bigger circle caused by the star, this light is solid and is the same distance in each direction, not the lines that they show in the manual. any ideas John

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.
Read More At : LX200GPS Telescope...

LXD75 AR6-AT I have a problem with the doublet lens. I seem to be able to collimate it, but there is still light that spreads out from stars and planets that are brite. Also when I'm handling the scope to place it on the mount I hear a clunking sound from the objective lens. I think the secondary part of the doublet is loose. I see the concentric rings when I attempt to collimate the scope but the blob of light that forms when you defocus the scope, forms beside the star and not on top (as I would expect). If the corrector lens is loose an slumping down from it's correct tightened spot would this cause the image to spray light from where it's meant to? Can I repair this or should I return the scope to Meade?

I have the identical issue --- AND It did not have it when it was new. I was returning from a road trip, and heard the rattling cell get louder and louder in the back seat. When I got home, the retaining ring that keeps the doublet in the cell had almost fallen out. I GENTLY checked for lens damage and noticed that one of the three tiny foil spacers between the lenses had fallen out and was missing. I tried to fabricate one out of aluminum foil, but upon reassembly, I have symptoms identical to the ones you describe. No matter what I've tried, I still have the same symptoms. I'm getting close to giving up and sending the cell to Meade to service. I suspect the issue is that the dimension of the tiny spacers and when one falls out or is replaced with the wrong size, we get the symptoms.
Read More At : LXD55 AR5EC Achromatic 5 in f9 Refracting Telescope 05095503...

Why can I not see the difference from the sky and a star even when I allign my laser well?

It sounds like you have not adjusted the focus properly. I recommend you take your telescope outside in the daytime and point it toward a building or tree or hilltop that is somewhat distant from you. The exact distance is not important, but it should a block or more. With the telescope pointed at the distant object, focus the telescope until the object is sharp and clear. The object might appear upside down -- that's normal for many astronomical telescopes. When you have achieved a sharp focus, leave the focus control alone until you are outside at night under the stars. The focus should now be fairly close for viewing stars and planets. Small adjustments of the focus control may still be necessary for the sharpest view. - Jeff
Read More At : NexStar 4 SE Telescope...

Just black Hi I just recently bought a Meade ds-2114ats-tc and I tried to use it last night with the kids, unfortunaltey after we set up the telescope all we could see was black. Yes we did make sure that the lens cap was off and that there was nothing blocking anything, we also tried setting it up in a couple of different spots in the back yard where we were close to a light source and also away from a light source. Basically everything I tried did not work but I am new to this so I could be doing something wrong still. I tried to manually look at the brightest star in the sky and still nothing....just black. Could I be setting this up in an area where there in either not enough light getting in or to much? This is my first time using a telescope so I don't even really know if I should be setting this up in the complete dark area or with a light source around like a backyard light for example. I am extremely confused please help.

I just got one of these today and they are different. My guess is you are having a focusing problem rather than alignment. Assuming of course you are removing the larger dustcap and not just the smaller one ha ha ha. The instructions include how to align but maybe you can use this Mine has two dustcaps, one full size with a smaller one in its center. Had the smaller one been offset it could have been used as an aperture stop to reduce thermal effects on bright objects such as Jupiter and the Moon. Another thing is a built in barlow within the focuser draw tube. This inreases the focal ratio of "f" number and makes align far more trickier than if it had been a straight Newtonian. Set-up the scope under and point at the bright blue sky in the day time. Pull off the small center dust cover and make sure the diagonal holder is centered under the small hole in the larger dust cover. If not that can be accomplished by adjusting the three thumb nuts on the front edge of the tube. Once this is done remove the larger dust cover and peer into the focuser from the side with the eyepiece removed. You should see blue sky and all the components should be centered. One can judge fairly well that their eye is centered but a simple trick is to draw an eyepiece sized circle on a piece of paper and using a pick or pencil, poke a small hole dead center on the circle. Place the circle centered over the draw tube and peer through that. No other tool will improve on the accuracy of this almost free and simple one. Now moving your eye closer to the focuser you should see the reflection of your own eye or in this case the hole in the center of the paper. The paper reflects and transmits enough light that it provides a bright enough targert to canter. Now you must experiment to determine which component is mis-alighned and what adjustment is required to correct. Try flexing each componet before loosening any adjustment screws.This will give you an idea of which component and in which manner it needs to move. Now my guess is, while you have some mis-alignment the almost f:9 focal ratio makes the image extra dark and so contrasty that if you are out of focus all you will see is dark. With your 28mm eyepiece, now point the scope at a daylight scene some distance away and bring the image to a focus. Note hoe far your draw tube is extended so you will be in that neighbohood come night time. I suspect this was your problem more than mis-alignment.
Read More At : DS-2114 ATS (325 x 114mm) Telescope...

Cant see a thing!!!!

Use the laser pointer that you put on the telescope when you were putting it together. or take the whole front cover off and look at the reflector and see if you see anything if you do try it again and see if this info helps please respond thanks and your welcome
Read More At : DS-2114 ATS (325 x 114mm) Telescope...

I have the Nexstar 8. It will not auto align or manual....

You must set TIME, DATE, and SITE-- probably does not know your actual location. Read the manual and perform all of the setup procedures. Some of these have a "starting position" again read the manual and make sure you are in the "home" position before you start the alignment. Read my TIP on my profile page about GOTO telescopes, and join the NEXSTAR forum on
Read More At : NexStar 102 SLT 102 mm (4.0) Refractor Telescope...

Lost vision The telescope was working fine until I was trying to match the view through the smaller spotting scope with that of the main telescope, and suddenly I could faintly tell I was aimed at the moon by a soft glow alone, but could no longer actually see details nor the usual brightness of it. I've taken the scope apart and cleaned the lenses and mirror. I can see beautifully if I remove the eyepiece, but of course I'm just looking at the mirrors inside at that point. When I replace the eyepiece, all I can see is that very faint glow which, when focused, gives me that funky view of the inside of my own eyeball like when you get your eyes checked at the optometrist's office and they shine that bright light in your pupil. Any idea what's happened here and how I can fix it? Maybe I need a new eyepiece?

Your telescope is a "Newtonian," as such it requires regular "collimation" Collimation the alignment of the optics. The mirrors must be lined up properly for the telescope to deliver a good image to the eyepiece. Your scope sound like it is way out of collimation. My guess is that the diagonal (secondary) mirror has rotated in it's mount. There are three basic tools for collimating a Newtonian the Sight Tube, Cheshire and Autocollimator. To get your digonal aligned correctly you need a sight tube. Rather than spend a lot on these consider making your own and keep an eye on eBay offerings. Don't bother investing in a laser collimator, they simply don't do the job unless you go for the very best. From some help with the collimation process check these links. The 60 page pamphlet "New Perspectives on Newtonian Collimation," Fourth Edition by Vic Menard and Tippy D’Auria runs $10, but if you really want to do it right it's worth the money. HTH, George
Read More At : Deep Space 78-9518 (675 x 114mm) Telescope...

Can't see anything but moon

You apparently broke the focus knob-- in that small telescope you will be lucky to ever get 100x--- use only the lower power eyepiece, or return it as you said.Here is the telescope that I recommend to beginners-- they come in various sizes depending on how much you want to spend. BIGGER costs more.
Read More At : (1607225) Telescope...

Can't focus my telescope

If there is nothing on the objective lenses or eyepiece lenses then it most likely needs collimation. This is where you adjust the secondary mirror while viewing an out of focus star. You need stable sky conditions to do this.There are most likely three small screws at the front of the telescope and these are what you use to adjust it. As one screw is loosened then another is tightened. Do this in very small increments. If you have your manual it should outline how to perform this. If not go to this web site: It will show examples of how objects look both in and out of collimation. There is a section further down the page for SCTs.A very handy tool for this is to replace your screws with Bob's Knobs ( . These replace the screws and allow you to adjust it by hand instead of a screwdriver.The other focusing problem I've experience with my Celestron SCT is to have the focus knob loosen up and then slip as I turned it so that I could never focus with it.Good luck and clear skies!-jodair
Read More At : Meade...

Here?s my problem : My scope model is LX200R 14?. I?ve pulled the focuser shaft out of the focuser arm pin. I?ve turned the locking lock knob several turns before putting back the focuser shaft. I noticed that the primary mirror cell turned together with the lock gear when I turned the locking knob ! (Is this normal ?) Afterward I tried to hook the crosshole in the focuser screw over the focus rod again. Here comes my problem: the focus arm/rod is not aligned to the center of the focuser opening at the back plate of the scope! So I have to tilt the focuser shaft in order to hook the crosshole over the focus rod. At that skewed position, I can never reattach the focuser assembly to the back plate! I?ve tried to rotate the primary mirror cell and thus the focuser arm, but it comes to a STOP, short of the center position I desire. I?ve also tried to turn the primary mirror cell a full circle : by 360deg and see if the focuser rod would come to the center position : but no, it comes to a STOP, this time even more short of the center position. I am now scared : why the focuser arm pin has come off its original position ? Why there is a STOP preventing me to position the focuser arm pin back to its original center position ??? Can I ever hook the crosshole back over the focus rod and reattach the focuser assembly again ? Regards, Stewart

Steward, this is Joe Lalumia-- I have seen your post on various forums. The 14 inch is different from the other smaller LX200 scopes. Probably Dr. Clay, and or Andrew on the Yahoo Group LX200 forum will know the answer because they service these scopes.Post a message there (register for free) and one of them will answer you about that very nice scope.Clear Skies! Joe
Read More At : LX200R 14 in. Telescope...

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.
next Question || Previos Question
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || || Terms of Use || Contact || Privacy Policy
Load time: 0.0732 seconds