Question about Orion SpaceProbe 130 EQ Telescope

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So with the Newtonian design scopes are you supposed to stand up the whole time to use it?

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Depends on the distance from the ground to the eyepiece. I use a step stool that has three steps and a platform on top - and still have to stand some times. Stand, sit, the scope don't care either way...

Posted on Jul 22, 2009

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Posted on Jan 02, 2017

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What does 9mm P.A.K. Blank Gun Ammo stand for


German Abbreviation. "Pistole Automatik Knoll" automatic blank gun [ammunition].
Calibre bore of 9mm and firing "Noise" cartridges usually employed through gas rejection shuttles or replica automatic pistols with a realistic firing simulation where the gas from the shot cartridge is used on the Newtonian principal of opposite forces to eject the spent shell while reloading a fresh cartridge (also cocking the mechanism) ready for the next pull of the trigger.

Learning is fun !

Aug 08, 2016 | Optics

1 Answer

How the specifications of telescopes is read


First you would look at the construction, a reflector or a refractor.



The first has at least 2 mirrors in it, and comes in several sub-types. The cheapest to begin with is a Newtonian, very cost effective. You can recognise these as having the eyepiece at the front end of the tube.



http://www.365astronomy.com/images/10237-skywatcher-quattro-12s-imaging-newtonian-telescope.jpg



Newtonians however have to be optically aligned (collimated) every so often to give a sharp image. This is simple enough when you learn how, but some find it a pain.



Refractors have no mirrors, only lenses, and you can recognise these as having the eyepiece at the rear of a longish tube. They don\'t need regular collimation. The better ones have more lenses in them, and in larger sizes are very expensive.



http://www.astronomyalive.com.au/media/catalog/product/cache/1/image/5e06319eda06f020e43594a9c230972d/7/0/709eq.jpg



The next spec you see is the aperture, or diameter of the optics. It is the diameter of the main mirror or lens, and governs the light gathering power of the scope. If you live in the city, there is no point to having a huge scope, as it only gathers lots of light pollution. If away from towns, a large scope will pick up faint nebula. 100 - 150mm (4"-6") is a good starter size.



Then you see the focal length (FL) quoted. This is the length of the light path in the scope. In a reflector it is folded up, and can be quite long without having a bulky tube (OTA). In a refractor it is straight, and so is limited in amateur scopes to about 1200mm.



The focal length governs the magnification you see, but only in partnership with the eyepiece (EP). These are interchangeable



http://www.atozastro.com/my_equip/eye_pieces_set.jpg



and each has its own focal length. The magnification is the scope FL divided by the EP FL. So a 1200mm FL scope with a 25mm EP gives a magnification of x48, which does not sound much, but is good for a sweeping view of the Milky Way. EPS range down to 4mm commonly, so there is wide choice.



There is not space here to discuss the mounts, but start with a robust AltAzimuth (AZ), say a Skywatcher AZ4. Another popular mount is the Dobsonian, confined to Newtonian reflectors.



I\'d urge you not to get a cheap department store scope. These are absolute junk with plastic lenses and poor construction. Depending on budget, get an affordable refractor first up, (so you don\'t have to fiddle with it much) with some Plossl type EPs (cost effective) like a



http://www.optcorp.com/celestron-astromaster-90-az-refractor-telescope-21063.html

May 24, 2014 | Measuring Tools & Sensors

1 Answer

Am I supposed to see the cross in the centre of image on celestron 76eq


You will see diffrection spikes when focused on a very bright object

http://www.goldastro.com/images/newtonian.jpg

and this can also appear around a bright planet. However it is very irritating, and to minimise it, make sure your scope is well collimated (optically aligned).

There is too much to collimation to include here, but there are many guides on the Net

http://www.cloudynights.com/documents/primer.pdf

http://www.atmsite.org/contrib/Carlin/collimation/

Feb 22, 2012 | Celestron FirstScope 76EQ (180 x 76mm)...

1 Answer

F5 Newtonian Dobsonian 10" I need


Hardin Optical is out of business-- however a well stocked hardware store should carry some springs that will work just fine.

Jul 04, 2011 | Hardin Optical Deep Space Hunter 10...

1 Answer

I have a hardin deep space hunter 6 newtonian telescope with a dobsonian mount about 6 years old, the finderscope glass is broken, would like to repair it or replace it .Any ideas ? thanks Ray


You can buy a new finder scope. There are many retailers on-line--

Here is one:
http://www.telescope.com/Accessories/Telescope-Finder-Scopes/pc/3/49.uts

May 22, 2011 | Hardin Optical Deep Space Hunter 6 (240 x...

1 Answer

While sighting in rifle with new scope the cross hairs began to roate in the scope. I am using see through mounts. Is it a scope problem or mounting problem


Is the scope moving in the mounts? Going back and forth, left and right? If so, tighten up the screws, Or are the stadia wires themselves spinning around inside the scope? That could be a problem. The wires are fixed in a tube that is mounted at the rear, the front is at the adj screws, they push back and forth on a spring, the whole tube moves, but it is not supposed to spin. You can get to this part easy enough, but go no farther than the cross hairs. Find out what they are supposed to be attached to, or just send the whole thing back and complain. If you break the seal, they will never honor the warranty if there is one. Hope this helps.

Mar 12, 2010 | Vortex Optics Vortex® Crossfire 2.5 -...

1 Answer

I have a Celestron Newtonian telescope, 76mm, 700mm. I am trying to locate the finder scope bracket to replace a broken one. I cannot find any other numbers, but it is about ten years old.


Simply buy another finderscope.

Many internet retailers sell finder scopes. Here is Orion Telescope:
http://www.telescope.com/control/telescope-finder-scopes

Jan 06, 2010 | Celestron PowerSeeker 60 Astronomical...

1 Answer

150-1400 Newtonian telescope Set the sight scope eye piece on the moon and looked in the pl 25mm lens in the focusing tube and no image? Can anyone help Philip moondogs2@myway.com


You must align the finder scope with the main telescope tube--

During the daytime look at something far away in the main scope-- without moving the scope center the cross hairs on the finder scope.

Good luck

May 04, 2009 | Optics

2 Answers

CELESTRON 127EQ faulty magnification


It won't increase viewing power by hundreds of time but it should be able to show you a close up view of the moon and planets where they look closer (or with the moon, parts of it look closer). When you say it looks further away, something is quite wrong as you know. It sounds like the eye piece is backwards in the mount? Can't imagine what else would make it smaller. Also can't imagine you could even get it in backwards. I have a scope by Meade that is essentially the same Newtonian design. Best of luck.

Dec 31, 2008 | Celestron PowerSeeker 114 EQ Telescope

1 Answer

Lost vision


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.
http://www.astronexus.com/node/6
http://www.amateurastronomy.com/collimate.html
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

Feb 24, 2008 | Bushnell Deep Space 78-9518 (675 x 114mm)...

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