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Author
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Topic: Any astronomers in the house??
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Stark Pilot
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posted 12-26- 02:26 PM
My family bought me a Meade ETX-90EC scope for X-Mas and I was looking for opinions on what filters to get. I live in a fairly urban area and wonder whether it would be more worth my money to invest in several color filters or a wide band nebular filter (H-Beta and OIII bands). This is the first scope I've had that is truly suited to deep sky observing so I'm not too sure what would be better.They also bought me the Autostar controller... this thing beats the hell out of screwing with star charts and an equatorial mount. Set the whole deal up last night and had aligned the scope using the computer in less than 5 minutes (aligns off of magnetic north and 2 stars) - then told it to find Jupiter - it auto-slewed around and put Jupiter about a third of the way off center at 48X. I centered Jupiter and popped in a 9.7mm eyepiece to bump it to 120X or so... crystal clear (cloud bands clearly visible) and rock steady tracking for almost an hour. Switched over to Saturn - which the computer just about nailed at just left of center in the reticle. Put in my barlow to hit a little over 240X and the tracking was still very good (about 15 minutes before Saturn drifted to an edge). At that mag the picture was still pretty crisp (ignoring atmospherics of course) and you could make out a Cassini division in Saturns belt. Didn't try any deep space objects other than the Pleiades (sp?) cluster as there was bit of fog forming by the time everybody had their fill of the planets. Anyhow... if you enjoy astronomy and have the money I highly recommend the Meade ETX scopes... great value, small package, excellent optics. -Stark IP: Logged |
goth Pilot
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posted 12-26- 04:45 PM
I don't know the answer, but I am very jealous.------------------ goth =FC= IP: Logged |
Stark Pilot
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posted 12-26- 05:12 PM
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Sv Pilot
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posted 12-26- 09:27 PM
Wow, cool! I have a crappy telescope than can barely find the moon on a clear night  ------------------ -Sv =FC= WWI in SDOE!
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Mudshark Pilot
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posted 12-26- 11:31 PM
Man I am the consumate consumer!This sounded like to much fun soooo...... I ordered the 70AT tonite,it's in my price range and it also comes with the autostar thingy plus the site I ordered from throws in a tripod for free!I also got the Meade software package.Can't wait for this stuff to get here,I need a new hobby,games are gettng a little stale for me right now and I might learn something with this telescope.I plan to get the photo attachment as well and hook my K-1000 to it,now that sounds cool,pictures of planets taken from my backyard!mudshark =FC= IP: Logged |
Stark Pilot
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posted 12-27- 01:44 AM
Good for you Mudshark! A word of caution though... while planets are quite easy to find, many other objects (like galaxies, nebulars, globular clusters, etc...) can be quite difficult at first. Just pick an object and keep trying! Once you've found the first slippery object it gets easier every time.Also, it would be a good idea to get a circular star chart - so you know what is above the horizon at any given time and have a much better chance of figuring out which star the computer wants you to center in the field of view in the scope (done during calibration)... it can be difficult if the scope says to center Altair and you have no idea if the scope is even looking in the right direction (it usually is, but sometimes it's a few degrees off and there will be several bright stars around the intended target - need to be able to figure out which one it is talking about). Also, if you view for extended periods... expect a little eye-strain at first. It takes time to get used to squinting through the eyepiece. Be careful about the first time you look at abright full moon with your scope... it can actually be painful at high magnification because it is VERY bright. Won't hurt your eyes but you might trip as you stumble around momentarily blind in one eye They make filters that screw into the eyepiece to help reduce the brightness and glare - they also make ones that only allow certain frequencies of light through. These are very useful to cancel out light pollution - a must for deep sky observing. Some excellent reading material to get you off to a good start is: The Backyard Astronomer's Guide By Terence Dickinson and Alan Dyer -also- Nightwatch by the same authors. An excellent online resource is www.astronomy.com - it has columns dedicated to beginners and a very helpful and responsive message board - including an area specifically on education for newcomers to the hobby. Also, this probably goes without saying... but don't expect to see detail in stars... they are just better defined points of light through a scope - on a good dark night you can see some color to them. You will see double stars though, which are neat. to yournaked eye it is just one star but throughthe scope you can see that it is two closely spaced stars. One more thing! Invest in a Barlow lense. The scope should come with 25mm and 9mm eyepieces which will yield magnifications of 14x and 39x respectively. The barlow lense acts in conjuction with the eyepieces and doubles the magnification - effectivley giving you 28X and 78X views. Alway start your observations with the 25mm and once you've located your object bump the power up. For the scope you are getting they also make a 3X Barlow (Meade Model #128)which would probably be worthwhile. These Barlows will run you about $45.00 a piece but are the best investment you can make on your scope. Another good buy would a be PL4mm eyepiece, which yields 88X without a Barlow... giving you 263X with a 3X barlow. Be warned though, at 263X it can be very difficult to get the target in the view - but once it is the view is amazing. The PL4mm runs about $40.00 bucks. Geez... hope I don't overwhelm you! Astronomy can (not will be) be frustrating at first, but once you get the basics down it is really amazing to look for yourself at what is out there. If you buy nothing else though, get a beginners astronomy book like one of the ones I mentioned above. A little knowledge will go a long way towards making your telescope more enjoyable! Oh yeah... one more thing, in case you don't know. Magnification is calculated by taking the focal length of the scope (350mm in your case) and dividing by the focal lentgh of the eyepiece in use (25mm or 9mm for the ones you get with the scope). If I don't shut up soon you won't need a book! -Stark IP: Logged |
Pete Hawk Pilot
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posted 12-27- 03:06 AM
From 3rd grade through highschool my brother and I had two telescopes. Some of my fondest childhood memories are of seeing the craters on the moon for the first time, the rings of Saturn, Venus, and the Great Red Spot on Jupiter. Plus when I realized my love for airplanes at an early age, we used our scopes to read Airliner markings of jets landing at Port Columbus and even of jets at altitude. I can't tell you how many hours I spent doing that, but loved every minute of it.I can remember one time later on, when I was trying to find Saturn after a few years of not using the scope and I was getting really frustrated. I decided to go get some food in the house but spun the telescope around and left it spinning as I walked away. When I got back I looked in the viewfinder and it was ON SATURN! Just an amazing coincidence  I'm hoping to buy another one soon in 2001 to share the beauty of the heavens with my wife and son. I can't wait! [This message has been edited by Pete Hawk (edited 12-27-2000).] IP: Logged |
Spanky the Mad Dog Pilot
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posted 12-27- 03:48 AM
Spanky here.. Well I don't have a scope, But I do have a K1000 Camera. Great peice of work. Got any good lenses for it? I keep meaning to get some but always end up spending my money on something else. I guess now you will have the ultimate lens. 
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Jaguar Pilot
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posted 12-27- 05:40 PM
aahhhh, astronomy. Something I wish I was more into. My father is actually is a prof. at the University of Calgary Physics and Astronomy department. I used to always go up to the UofC observatory with him as a kid, but I haven't been up there in a LONG time due to school and work.  If you ever come up here, we could head out there. http://www.acs.ucalgary.ca/~milone/rao.html ------------------ Cheers! Lt. Col. Jaguar The FS Hangar IP: Logged |
Mudshark Pilot
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posted 12-27- 05:58 PM
Wow Stark,that's a helluva post!I think I'll keep that sucker for reference!I'm so looking forward to this,I hope the thing comes by Friday or Saturday.As to the camera,yeah the K-1000 is a nice piece of equipment.I got it many years ago and I also had a Canon AE-1,the more expensive AE-1 died,light meter stopped working and the shutter speed went screwy on me and it would have cost as much to fix as repair so I've been using the K-1000 ever since with no problems.I only have a wide angle,50mm and a small zoom[not very powerful]but I don't need much more than that and soon I'll have one huge telephoto lens!! mud IP: Logged |
Stark Pilot
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posted 12-27- 06:35 PM
Looks like I'll be making a trip to Calgary in my future... If I ever get that far north you can bet your boots I will take you up on that offer Jaguar!Mudshark - one word of warning if you do any terrestrial viewing with your scope - everything will be mirror imaged. It doesn't matter when viewing objects in space if they are backwards... I mean without the telescope there's no way for you to know which way is right anyhow. They make a little doohickey call a 45 degree erecting prism for the scope that gives you a corrected terrestrial view. Very handy too because it plugs into the bottom of the scope (the eyepiece is normally on the side at the base) and makes viewing near the horizontal much more comfortable. You can get a real crick in your neck and back having to lean over and look straight down when looking at things on earth. The main reason they don't correct the view out the main eyepiece is that it requires one more lens (or a prism) and therefore you would have some light loss, thus degrading the brightness and detail of celestial images. With terrestrial objects the light loss doesn't matter. -Stark IP: Logged |
Stark Pilot
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posted 12-27- 07:06 PM
Mudshark -If you have a binoculars you can get a little headstart on your scope and teach yourself to read a star chart at the same time. At www.telescope.com you can dowload and print a star chart for this month that will let you identify the brighter stars and give you a better idea of where the bright stars your telescope is going to want you to identify and center for alignment are. At the bottom right of the main page at telescope.com is a link that says "In the Sky Tonight" - you'll find the chart there. The easiest way to use it is to hold it over your head correctly oriented to the compass directions on the paper - then you can compare what is on the chart to what you actually see. A red flashlight is immensly useful for this as it will not ruin your night vision but will let you read the chart easily. If you don't a have a red light, some red cellophane over any flashlight will work. There will be three objects out tonight that are quite bright but are not on the chart. To the southwest you should be able to see Venus as the brightest object in the sky (other than the moon if it hasn't set yet). Not much to see there because it is so bright. To the east, near M45 (the Pleiades cluster (on the chart, to the naked eye it is a fuzzy blotch in the sky that is kind of pork chop shaped), is Jupiter and Saturn. Jupiter will be a bit "below" and to the "right" of M45 and quite bright - second only to Venus in brightness. Saturn will be to the right of and slightly lower than Jupiter. It is only about as bright as a bright star but should be fairly easy to find. Through a decent pair of binocs you should be able to see that Jupiter is a disc - not just a dot, and probably see some moons out next to it (look like tiny little stars in a line on either side of the planet). Saturn, if conditions are good, should resolve out to a slightly fat blob with the potential of moons next to it. M45 has a lot to show with binoculars... it changes from a fuzzy blob to 7 fairly bright stars (known as the 7 Sisters) and lots of dimmer stars (hundreds of them). Another interesting thing that you might be able to locate with binoculars is M42 in Orion (on the chart) this is the Orion Nebula and will look like a faint grey cloud - it will be fairly hard to distinguish so don't worry if you don't see it. There is also a nice double star in Orion (chart, again )that you can probably resolve with binoculars. Hope you have some fun with it! -Stark Oh yeah... you will see many things listed as M### or NGC#### - these are know as Messier and NGC numbers. Basically they are catalogs of known objects in the sky - you can get Messier and NGC catalogs from any bookstore with a good astronomy section - certainly an educational thing but not absolutely neccesary. They would be helpful with your telescope though, as the computer will refer to many objects by their Messier or NGC numbers. You will see lots of Messier numbers and some NGC numbers on that start chart if you download it. Anything with 4 digits is an NGC number. I just realized that you said you got the software package from Meade as well, I think this includes printable Messier and NGC catalogs with it - so you probably won't have to get one.
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Mudshark Pilot
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posted 12-27- 08:11 PM
Man this great stuff,thanks for all the info!Problem now is we have a huge front moving in that promises to keep skies cloudy into the weekend,I did order one of the 45 degree prisms,thought it would be a good idea to eliminate wear on the neck. Once again,thanks for all the info[I know who to ask if I have trouble!]Hopefully in the near future I can scan some photo's of Saturn and post them!mud IP: Logged |
Stark Pilot
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posted 12-27- 09:19 PM
OK - astrophotography... not too much practice on this myself - don't own an appropraite camera, but I have tinkered. The basic rules are fast film (over 400, preferably 800) and long exposures (+ 1 sec. out to as long as 20 minutes for deep sky stuff). You will need a quite good alignment of the scope to keep the object correctly centered for the film on longer exposures - so use the precise alignment features of the computer on your scope. This entails doing the normal 2 star alignment and then finding some other objects (other bright stars and planets near your photgraphic target) and "synchronizing" the scope to those objects as well. Each additional object you synch to will improve the track on your target as the computer builds a better idea of where it is on the planet with each consecutive object it gets synched to. This may not make sense right now but it will after you use the scope and computer a bit. Also, I'm not sure if you can achieve this through developing methods or not but it can be helpful to use color filters to increase contrast on planetary features. The place to ask about whether this is useful for photography would be the stargazing or education boards over at astronomy.com - in fact I'm certain there are some fairly recent threads on the subject. Unfortunately their board software sucks so it is difficult to find a specific item... just look for a bit and you'll find what you need - or you can just post a question as they don't seem to mind answering questions they have already answered recently - especially in the education forum.I'll shut up now... (yeah, like that's gonna happen) -Stark IP: Logged |
Spanky the Mad Dog Pilot
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posted 12-28- 04:49 AM
Spanky here... Yeah I want to pick up a wide angle and zoom lens somthing up to about a 200mm. And a new flash and tripod. LOL My bud just got a new camera with a 200 lens all crazy fancy and stuff but it feels SO FRAGIL for like 950$ I would be scared to take it where I take mine (mountain biking, camping and hiking). IP: Logged |
ArthurQ Pilot
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posted 12-28- 08:42 AM
This may be a dumb question-but-can you pick out the new space station with the telescope? I thought I heard somebody somewhere say you could see it as a bright object in the sky at some times with the naked eye. Just curious.AQ IP: Logged |
Stark Pilot
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posted 12-28- 05:03 PM
Yes, you can spot the ISS with a scope, and even the naked eye. Unfortunately it is so small that unless yopu have meter class scope you will not be able to pick out any real details. It may be obvious that it is not just a point of light, like a star, but that's all really.-Stark IP: Logged |
ArthurQ Pilot
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posted 12-28- 07:28 PM
Cool!Where should one look from the southeastern US to see the ISS? Thanks for the reply to a dumb question Stark.AQ IP: Logged |