Celestron Collimation Eyepiece 1.25″
Sunday, January 17th, 2010 at
2:34 am
Buy Celestron Collimation Eyepiece 1.25" at Amazon
Product Description
Celestron 1.25 inch (1-1/4 in.) Collimation Eyepiece
Buy Celestron Collimation Eyepiece 1.25" at Amazon
US $59.90
this dude simply speaks the mind of every man trying to make it. Seriously how could yall listen to anyone, with people like him rapping.
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O. Porth, C. Fendt submitted to ApJ We perform axisymmetric relativistic magnetohydrodynamic (MHD) simulations to investigate the acceleration and collimation of jets and outflows from disks around compact objects. The fiducial disk surface (respectively a slow disk wind) is prescribed as boundary condition for the outflow. We apply this technique for the first time in the context of relativistic jets. The strength of this approach is that it allows us to run a parameter study in order to investigate how the accretion disk conditions govern the outflow formation. Our simulations using the PLUTO code run for 500 inner disk rotations and on a physical grid size of 100×200 inner disk radii. In general, we obtain collimated beams of mildly relativistic speed and mass-weighted half-opening angles of 3-7 degrees. When we increase the outflow Poynting flux by injecting an additional disk toroidal field into the inlet, Lorentz factors up to 6 are reached….
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In ye olde english, it would be "to spy". In commoners language, it's be something like "to Look through". I really can't think of any techincal term for that though.
One volunteer who will be here June – mid July has a 20" scope with an AMAZING $800 eyepiece. Can see some cool stuff.
1st comment! haha whatever… rad video
O. Porth, C. Fendt submitted to ApJ We perform axisymmetric relativistic magnetohydrodynamic (MHD) simulations to investigate the acceleration and collimation of jets and outflows from disks around compact objects. The fiducial disk surface (respectively a slow disk wind) is prescribed as boundary condition for the outflow. We apply this technique for the first time in the context of relativistic jets. The strength of this approach is that it allows us to run a parameter study in order to investigate how the accretion disk conditions govern the outflow formation. Our simulations using the PLUTO code run for 500 inner disk rotations and on a physical grid size of 100×200 inner disk radii. In general, we obtain collimated beams of mildly relativistic speed and mass-weighted half-opening angles of 3-7 degrees. When we increase the outflow Poynting flux by injecting an additional disk toroidal field into the inlet, Lorentz factors up to 6 are reached….
Also check the focuser. Is it flexing? I usually collimate at about 45 degree tilt as mentioned above with the focuser about a third of the way out. Make sure you don't over tighten the locking bolts on the primary, as this can also throw the collimation off a bit.
I always warn folks not to waste a lot of viewing time obsessing with "perfect" collimation.
Clear Skies
Lee 1. moon filter, 2. plossl eyepiece 3. laser point
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Meade makes a similar series of scopes.
http://www.meade.com/lx200r/index.html
I’m a bit behind, wtf is that?
Divide the focal length (in millimeters) by the focal length of the eyepiece (which is always stated in millimeters). So 2000/35 = 57x.
Your computer should have a calculator utility. Feel free to use it.
If you are looking to purchase an eyepiece to maximize your field of view, I recommend that for any eyepiece longer than about 32mm the barrel should be 2" rather than 1.25" (yeah, barrel sizes are still stated in inches), otherwise you'd be better off with a 30-32mm eyepiece because a longer focal length in a 1.25" barrel will have the field of view cut-off and narrowed in spite of the lower magnification.
In other words, without going to a larger barrel eyepiece there will be no gain in field of view going longer than 32mm. Eyepiece design has some bearing as well, but for our purposes we'll assume Plossl eyepieces.
A copy-wright
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never do an invention nor patent yourself. go get a patent/copyright/trademark lawyer and have him as your go to man.
do not share your ideas, notes, nothing with anyone else besides this attorney. you can have small contracts drawn up by this guy to show the idea to others so they can't steal it.
no.1 rule with this stuff….protect yourself….ANYONE is liable to steal this idea from you, trust me, it happens every day.
ROFL OK
What is happening is that your tube is flexing. This happens to some extent with all telescopes, but usually it isn't sufficient to cause problems. I'd recommend collimating it with the tube at 45° to the vertical, so that the errors average out.
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they didn't have good quality control
Discover held a contest for astrophotographers who use Celestron equipment to capture the beauty of the heavens. The Bad Astronomy blogger, Phil Plait, judged the entries, and these are the 10 images (okay, 11�there was a tie) he chose as the best of the bunch.
its not worth the price….
Since you are spending such a large amount of money I suggest that you ask this question at in the forums. There are many very experienced amateur astronomers there, many of whom have probably had experience with this telescope, and they'll be able to give you the low down on how it compares to similar ones.
For that much, why don't you buy a used 10" though?
its sad im like the only guy that has long enough hair to be deidara
You got a Nexstar5? Wow! I am so jealous. That is so awesome. And you're into astrophotography? Cool. Doesn't your scope already have the flip mirror thingy? Mine does. In any event, with your CCD package you should have all the instructions you need. Sorry I couldn't be of more help. I have a camera adapter (T-ring) for my Meade ETX 90 but the images aren't very satisfactory. I like the Mak-Cass optics, though. The detail of the moon's surface is awesome, but 90mm is a little too small in aperture to really image the cloud tops of Jupiter or pick out very many deep space objects. The Andromeda is still a little fuzz ball, even under clear night skies. I'm hoping to get an 8" Meade LX series Schmidt Cassegrain scope one of these days. Living in the city, there's always the consideration that after the newness wears off I will be too lazy to drive it out into the countryside for a look-see. I still remember one extremely dark and clear night at Trinity Lake. Even without the aid of optics, looking up into the depth of the night sky with so many stars that they obscured the constellation guide stars, made me dizzy. And with a pair of 10×25 binoculars, the starfields were truly awesome.
no.
the main issue is the mount: too wobbly, and equatorial mounts are not the best choice for visual observation.
this question is asked a lot around here, and the answer is the same: buy and read one of the classic references, like nightwatch. hook up with local astronomers to see what the hardware looks like and what things in the sky actually look like.
once you have done that you can make an informed decision. the hot ticket nowadays is usually an 8 to 10 inch dob. they are powerful scopes, amazing value, and will keep you busy observing for a lifetime. only you can know for sure. it's your money, not mine.
only buy from a telescope store. do not buy from a discount or department store. if you love us at all you will not even think about ebay.
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Eyepiece needed for 3D rig
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The focus adjustment if it is a telescope. The tube itself if it is a microscope with focus being obtained by moving the instrument itself closer or farther away from what is on the stage. (the stage might be what moves instead of the body of the microscope.)
They are made by the same company (GSO, I think). The major difference, besides cosmetics and branding is the ocular stop. I have a 9mm XCel, which I rarely use. The field of view is narrow and dim, which would be common for this type of eyepiece. Don't think I've ever used an Epic, so I can't give a fair comparision.
MMmmmm. Fun.
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Controversy has surrounded the decision making regarding the indications for each of these treatments. Early outcome data appears to favor coil embolization. However, longer term outcomes may favor clipping for aneurysms in certain locations. Two recent studies seem to reflect particularly high risk of surgery in patients over 65 years of age and also suggest that early risks are higher in surgically treated patients. Ultimately, the decision to treat with surgery versus coil embolization should be made by a team or individual with experience with both options. Younger patients with easily accessible aneurysms likely derive a higher benefit from surgery while older patients with less accessible lesions likely benefit more from coil embolization. These generalizations are difficult to apply to every case, which is reflected in the wide variance internationally in the use of coil embolization versus open clipping.
Not every type of aneurysm can be treated with the described method. For example, certain wide-necked and inaccessible aneurysms currently still require surgical intervention, even though new methods (that use a type of stent) are already being studied and tested. Surgery is also usually required for venous aneurysms as introducing foreign material in the low flow veins can produce a high risk blood clotting environment.
Treatment of peripheral aneurysms
For aortic aneurysms or aneurysms that happen in the vessels that supply blood to the arms, legs, and head (the peripheral vessels), surgery involves replacing the weakened section of the vessel with an artificial tube, called a graft. More recently, covered metallic stent grafts can be inserted through the arteries of the leg and deployed across the aneurysm.
I love his energy! He’s so content with the world and looks like such a fun little guy! I enjoy your videos.
I’m seeing great images coming from the CGEM. I took images of M42 last night with decent success even with the moon being full.
Qualcuno spiega a un ignorante cosa fanno di speciale queste lenspen?
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i guess nobody knows about the MP5 gun
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oh it was just sarcasm… doest read as well when typed
x
Join a local Astronomical Society or club. You can attend one of their star parties and try out other people's eyepieces in your scope before you spend your money. You can judge for yourself what is the best for you.
I do not recommend a barlow. Adding more lenses, more pieces of glass, also adds more distortion to your viewing experience. You are much better off adding eyepieces to your collection than you are adding a barlow.
If it were me, I would get one in the 8-10mm range and I would get one in the 32-40mm range. Wide field are best. Orion has the best customer service and value for the money. http://www.oriontelescopes.com/
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O. Porth, C. Fendt submitted to ApJ We perform axisymmetric relativistic magnetohydrodynamic (MHD) simulations to investigate the acceleration and collimation of jets and outflows from disks around compact objects. The fiducial disk surface (respectively a slow disk wind) is prescribed as boundary condition for the outflow. We apply this technique for the first time in the context of relativistic jets. The strength of this approach is that it allows us to run a parameter study in order to investigate how the accretion disk conditions govern the outflow formation. Our simulations using the PLUTO code run for 500 inner disk rotations and on a physical grid size of 100×200 inner disk radii. In general, we obtain collimated beams of mildly relativistic speed and mass-weighted half-opening angles of 3-7 degrees. When we increase the outflow Poynting flux by injecting an additional disk toroidal field into the inlet, Lorentz factors up to 6 are reached….
if you can use a full synthetic oil thats all youll need every 3000 miles.