Is This A Good Eyepiece For My Telescope?
Saturday, December 19th, 2009 at
6:43 am
I have a zhumell perigee 100 Matsukov-Cassgrain. It has an aperture of 4" and a focal length of 1400mm. I am looking into doing some astrophotography. I have found a Williams adapter eyepiece to fit my nikon coolpix. It has a focal length of 24mm. Is this a good match of eyepiece and telescope?
US $11.99
Yes. Sounds lovely!
A 24mm eyepiece is a good medium-range magnification – good for planets, clusters, larger galaxies, the Moon. If I only had one eyepiece to work with, I’d go with 24 or 25mm. As for the camera, hopefully this will work – but when I attached by camera (old SLR) to my old telescope, it attached directly to the back without an eyepiece. So I’m having trouble picturing this arrangement.
24mm eyepiece is well designed for what you want, and the focal length on the telescope is good also. However, 4 inch aperture is rather small. Don’t expect Hubble quality photos!
I always liked Plossel eyepieces. I usually keep 25 mm around for everyday viewing (if you don't want to switch out much, it has a big enough field for most galaxies, but can also resolve the ring nebula and double stars). I also have a 12 mm and 40 mm on hand for larger fields and smaller objects – anything under 12 or especially 9 mm is pushing it, resolution wise – it's too hard to focus under most conditions and with most smaller telescopes (yes, smaller as in less than 16 inches, in my experience). Your 32 should be good as a sub for a 40, but I'd get at least two smaller ones.
So this why that theres atleast two other cartoons that use the idea of making Earth a hostage to a comet being pulled by magnetism. These two other cartoons are Street Fighter and Samurai Pizza Cats.
Hey!
I would think, that for your husband to continue looking for a job. Everyday just be praying as as family for God to open up the doors for you. He knows what you need. Have faith in him. Continue going to church.
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i believe it is so that you can show someone else what you are looking at. I think the pointer would be placed at some point and then you would have another person look into the microscope and see what you are referring to.
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Pluto is presently at magnitude 14, which is about 1600 times dimmer than magnitude 6. To increase the brightness by 1600 x, a person who can see magnitude 6 with the naked eye would need an aperture 40 times wider than his/her dilated pupil.
I don't know what size pupil is needed to see magnitude 6. Human pupil sizes vary with age. A young person might have a dilated pupil 8 mm wide. If that is the standard, then that person would need a telescope aperture of 320 mm (12.6") to see Pluto. An older person, like me, might need a 24" telescope.
Of course, time lapse photography is different. You can photograph Pluto with a much small telescope if you have a steady mount, a planetery tracking motor and a CCD camera.
You could do one of two things. You could have a custom door made to fit the arch, but it would be very expensive. Or you could frame in the arch and buy a less expensive regular door. This is not really a DIY project, especially if you have no framing or door hanging experience. Call a local door & window company for a free quote.
Definitely put it in the response card.
You've windex'ed the inside as well?
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I used this answer in my homewk also and got full marks. Hope this helps
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Our telescope (the big LX200) is getting sad from lack of use since we moved here. #missingcleardarkAZnightskies
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#nowplaying Annie use your telescope -by Jack's Mannequin
A microscope without an eyepiece is still a microscope Call it the digital microscope
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It's unlikely that what you're seeing is actually behind your eyepiece. Rather that hair is almost certainly on your focusing screen in the mirror box. As is the smudge, if it is a smudge. Then again it could also be a piece of debris on your mirror (if big enough, such debris could appear in the viewfinder as an out-of-focus blot).
The first thing I try before anything else is, with lens removed and camera face down, blast the interior with some air from a bulb blower (NOT CANNED AIR) once or twice. Then test your camera. With any luck your viewfinder will appear clean. Though if you do still see a smudge, and you feel like you absolutely must be rid of it, then consider taking it in to be cleaned by a professional.
PS. Whatever you choose to do, DO NOT touch the focusing screen. It'll scratch easily. The mirror is also fairly delicate.
Joerg – what questions do you have? What I know is this: it shows stars orbiting the giant black hole at the center of our galaxy, and the motions are based on 15 years of observational data from the Keck telescope. The original post from Daniel Holz is here, and may help supply some context:
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“In a release about their discovery, we learn more about this EXTREME situation:
The binary system consists of two white dwarfs. These are the burnt- out cinders of stars such as our Sun, and contain a highly condensed form of helium, carbon and oxygen. The two white dwarfs in HM Cancri are so close together that mass is flowing from one star to the other. HM Cancri was first noticed as an X-ray source in 1999 showing a 5.4 minutes periodicity but for a long time it has remained unclear whether this period also indicated the actual orbital period of the system. It was so short that astronomers were reluctant to accept the possibility without solid proof . . . Professor Tom Marsh from the University of Warwick said, “This is an intriguing system in a number of ways: it has an extremely short period; mass flows from one star and crashes down onto the equator of the other in a region comparable in size to the English Midlands where it liberates more than the Sun’s entire power in X-rays. It could also be a strong emitter of gravitational waves which may one day be detected from this type of star system.”
Marsh and his colleagues got their ultimate proof of the 5-minute year by using the giant Keck telescope on Hawaii. Their work will be published tomorrow in the Astrophysical Journal of Letters.”
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at the time of the child’s birth–AND..yes, a birth, additionally, which must occur on U.S. soil in order to avoid the involvement of any foreign jurisdiction. This is the one and only prescription or “definition”, if you will, of a natural born citizen that is in proper accordance with The Natural Law; one respecting the ancient, time-honored tradition & practice among decent governments and institutions that adhere to humankind’s higher calling
Theoretical angular resolution is proportional to aperture. Therefore the theoretical resolution of the Chilean telescope would be 9.6/2.4 (4x) better.
Grayson! Great job on this ladies!
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RT Have a look at this interview.
Most amateur astronomers spend very little time looking at the stars, because even the largest telescopes don't show stars as anything other than pinpoints of light. What astronomers observe are mostly solar system objects (Sun, Moon, planets, comets) and deep sky objects (star clusters, nebulae, and galaxies).
Here are a few web pages with good information on beginner's telescopes:
For more advanced information, read Phil Harrington's Star Ware, 4th edition (Wiley).
You'll get the greatest value for your money with a Newtonian reflector on a Dobsonian mount, such as these:
Buy from a store which specializes in telescopes and astronomy, either locally or online; don't buy from department stores, discount stores or eBay as mostly what they sell is junk. Find your local astronomy club and try out different telescopes at one of their star parties:
http://www.skyandtelescope.com/community/organizations
One other thing that the other Answerers have not touched on, is refilling. I hope you do not want to take a Driving Vacation. You get to a town and will have to hunt for an LPG refill station. They are not like gas stations, they are not everywhere.
I had a friend turned his 4 wheel drive with a 428 Cobra Jet into LPG. He regretted it every day, but he had made the mistake of selling his carburetor and everything else he took off the engine to install the LPG setup so it would have cost too much to change it back. He ended up unloading it on an unsuspecting guy that though LPG was the way to go. It was a perfectly good way to make a 428 Cobra Jet worthless.
A shop near to me said earlier it'd be best to go for the Explorer 130P with a better eyepiece but that's only 5.1"
The only telescope that has been able to image the disc of a star is the Hubble.
No amateur telescope you can buy has enough resolving power to allow you to see the disc of even the nearest star (..the sun being the exception of course..)