Kim
super member
Reged: 04/16/04
Posts: 135
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Hello!
My name is Tae-Woo Kim and I'm 15(almost 16)
also I live in Chicago.
I bought a binoculars(Olympus 10x50) before 9 or 10 months ago and sometimes I watched the Night Sky.
Then now I want to buy a Telescope as my first telescope,
and I thinking buy C102HD(C4 R) with accessories, But I got little many questions.
Can you answer about it?
1)Is C102HD(102mm F10) good as a achromatic and First telescope?
2)I know only kind of EQ mount, What kind of EQ mount is same with a C102HD's mount?
3)I want to buy Low, Middle, High magnification Then In Low I got 20mm(50x) form own accessoris. In Middle I can not choose Between TeleVue PL11mm(90x) and Ultima 10mm(100x). which one is better choice?(ohh i want to see planet Often) In High I can not chose too. Maybe I can choose between Vixen's LV7mm(142x) and LV6mm(166). Which one is better choice?
4)In Motor single-axis or dual-axis, which one is better choice(I think dual-axis is better... only my thinking)
5)I want to buy a Fringe Killer filter but I can not find any web-sites. how can I buy this filter? And is that good choice for small achromatic telescope?
6)Lastly I want to buy sun filter but I don't know about it
>>> http://www.buytelescopes.com/product.asp?t=&pid=2347&m= Is this good?
Please answer to my question and I'm sorry about too many qustion.
Edited by Kim (04/18/04 01:01 AM)
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Steve Landry
professor emeritus
Reged: 04/25/02
Posts: 609
Loc: Graham, Washington
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Hi Tai-Woo Kim! and Welcome to Cloudy nights!
I happen to own the scope you are asking about, so I will try to answer as best as I can.
Quote:
1)Is C102HD(102mm F10) good as a achromatic and First telescope?
I think it is a fine achromat and a good 1st scope. The focal ratio is F10 and that will keep Chromatic aberrations down, but won't eliminate it. There is some color on Jupiter, but Saturn is a lot dimmer and I don't notice it when viewing saturn.
Quote:
2)I know only kind of EQ mount, What kind of EQ mount is same with a C102HD's mount?
The mount supplied is the CG-4. The tube is not too heavy for it, but it is a long scope and you will notice vibrations when focusing.
Quote:
3)I want to buy Low, Middle, High magnification Then In Low I got 20mm(50x) form own accessoris. In Middle I can not choose Between TeleVue PL11mm(90x) and Ultima 10mm(100x). which one is better choice?(ohh i want to see planet Often) In High I can not chose too. Maybe I can choose between Vixen's LV7mm(142x) and LV6mm(166). Which one is better choice?
For your middle magnification, either eyepiece you suggested will be fine, both are high quality plossls.
For your high magnification, I don't have any experience with Vixen LV's, maybe someone else can help. I use Celestron Ultimas, 7.5mm (122x) and 5mm (200x)
For low power, you might consider getting a 30mm Eyepiece. Again I use a Celestron Ultima 30mm (33x) and it's one of my favorites for finding things and viewing extended objects.
Quote:
4)In Motor single-axis or dual-axis, which one is better choice(I think dual-axis is better... only my thinking)
I got the dual axis drives and like them. They were not hard to install, just be careful to balance your scope properly and you'll be fine.
Quote:
5)I want to buy a Fringe Killer filter but I can not find any web-sites. how can I buy this filter? And is that good choice for small achromatic telescope?
I'm not sure what a "fringe killer" filter is, but if you are talking about minus-violet filter. Check this site out.
http://www.siriusoptics.com/
I haven't used it myself, again, the only violet I see a lot of is when I view Jupiter, and brighter stars, but I don't find it offensive.
Quote:
6)Lastly I want to buy sun filter but I don't know about it
>>> http://www.buytelescopes.com/product.asp?t=&pid=2347&m=
I haven't used any solar filters, so I'm afraid I can't help you with this one.
Again, Welcome to Cloudy Nights!
Cheers!
 Steve
--------------------
Orion ED80
Orion ED100
Celestron C4R
Orion 120/F5
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Kim
super member
Reged: 04/16/04
Posts: 135
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Thank you!
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Steve Landry
professor emeritus
Reged: 04/25/02
Posts: 609
Loc: Graham, Washington
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you are very welcome!
Make sure you come back and let us know how it's going.
Cheers,
Steve
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Orion ED80
Orion ED100
Celestron C4R
Orion 120/F5
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Tim2723
The Moon Guy
Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
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Hello Tai-Woo Kim,
I also use the C102HD, and it is a very good telescope for a low price.
For high magnification I use the Vixen 5mm (200x).
I have dual axis (2 motors) drive, and like it very much.
Here is information on the Fringe Killer filter:
http://www.astrovid.com/baader_fringe_killer_filter.htm
It is a good choice for this telescope.
When you buy a solar filter, make sure it is from the best company and is safe. Ask others on the solar observing forum for information, they are the experts.
Good luck,
Tim
--------------------
Intes MK-66 Deluxe (6" f/12 Maksutov)
Celestron C-102HD (4" f/10 achromat)
Celestron C-102AZ (4" f/5 achromat)
Orion 6LT (6" f/8 classic Newtonian)
Orion Apex 90 (90mm Mak spotter/grab-n-go/little fun scope)
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Kim
super member
Reged: 04/16/04
Posts: 135
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Ohh I forgot one more(#6) question is Between Deep-Sky filter and sun filter, which one is better choice?
Edited by Kim (04/18/04 12:35 PM)
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Steve Landry
professor emeritus
Reged: 04/25/02
Posts: 609
Loc: Graham, Washington
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Kim,
It's not a matter of better choice. These are two completely different filters. DO NOT look at the sun with a deep sky filter!
Deep sky filters will help block "some" light pollution effects when viewing nebulas and such.
A solar filter will allow you to look at sunspots.
Steve
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Orion ED80
Orion ED100
Celestron C4R
Orion 120/F5
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Tim2723
The Moon Guy
Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
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Kim,
Steve is right! Do not ever look at the sun with a Deep-Sky filter, but only with the solar filter! Do not even look at the sun with the small finder telescope. Read all you can about solar filters and how to use them and talk with experts here.
I think you are asking which filter to buy first, should you buy the Fringe Killer first or the solar filter first?
You do not need either Fringe killer or solar filter to start in astronomy. The fringe killer will help you a little looking at bright planets and stars, but you do not need it today. Only buy the solar filter when you have learned all about looking at the sun and safety. If you have only a little money, buy the telescope #1, the high magnification eyepiece #2, then wait to see what you think about your telescope while you save more money.
Buy in this order:
#1 C102HD telescope and mount
#2 High magnification eyepiece, maybe more than one or a barlow lens also.
#3 Motor drive, single or dual axis
#4 Books and maps to learn from
#5 Fringe Killer filter and other small filters
#6 Solar filter
Come back here to ask all your questions. We are your friends and will help you choose well.
Tim
--------------------
Intes MK-66 Deluxe (6" f/12 Maksutov)
Celestron C-102HD (4" f/10 achromat)
Celestron C-102AZ (4" f/5 achromat)
Orion 6LT (6" f/8 classic Newtonian)
Orion Apex 90 (90mm Mak spotter/grab-n-go/little fun scope)
Edited by Tim2723 (04/18/04 01:44 PM)
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NJScope
sage
Reged: 03/08/04
Posts: 332
Loc: NJ
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Kim:
Tim and Steve have offered excellent advice regarding the C102HD which I also purchased as my first scope. Although the dual-axis drive seemed like the best choice, in practice I rarely used the DEC drive (which can be kept unclutched) and either either nudged the OTA or slewed manually. Your choices for eyepieces are very similar to the ones that I regularly use. The Baader "fringe-killer" filter is on back order from Kendrick's otherwise I'd be using one myself. Regarding the sun filter, please be very, very careful while setting up and be sure that the finder scope is either removed or capped and the filter itself has been inspected prior to each use. I use the Celestron (Model 94138) C4.5 Mylar Solar Filter. The sun appears white and is suitable for astrophotography (ND5). Hope this helps.
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Kevin
UnderOak Observatory
Celestron Hyperstar C8 SCT
Celestron Classic (1972) Orange C8 SCT
Vixen VC200L
Losmandy G-11 Gemini
Losmandy GM-8
Televue 76/SolarMax 40
Televue NP101
ST-402ME/Nikon D70 DSLR
SBIG DSS-7 Spectrograph
SBIG ST8-XME & CFW9 filter wheel
Starlight Xpress SXVF-8MC
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Kim
super member
Reged: 04/16/04
Posts: 135
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Thank you guys
hmm I'm not crazy about look a sun with Deep-Sky filter or without filter-_-;;;
I just ask for which one(Sun or Deep-sky) is more interesting thing...
Then now I'm sure buy C102HD and Fringe Killer filter, Dual-axis motor
But my problem is eyepiece and solar filter(I think I'll buy filter but I don't know which brand is sell safe filter...)
Can you tell me how can I choose eyepices(middle and high) precisionly in list? and safe brand's solar filter.
Edited by Kim (04/18/04 06:56 PM)
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Tim2723
The Moon Guy
Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
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Hello Kim,
Because I am not an expert in solar filters, I have asked Joe Donahue to answer your questions. Joe is the moderator of the Solar Observing forum, and he is an expert on using solar filters safely. I'm sure he will contact you soon and give you the best advice.
I am trying to find a source of eyepieces for you also. I have bought the Celestron eyepiece kit for my C102HD. It has 6 good quality eyepieces, a 2x barlow lens, a moon filter, and six color filters. It comes in a very good case to hold all the eyepieces. I only paid $100 for it, and many people here have this also. It is a very good set of eyepieces for a little money, and good for people starting out.
Tim
--------------------
Intes MK-66 Deluxe (6" f/12 Maksutov)
Celestron C-102HD (4" f/10 achromat)
Celestron C-102AZ (4" f/5 achromat)
Orion 6LT (6" f/8 classic Newtonian)
Orion Apex 90 (90mm Mak spotter/grab-n-go/little fun scope)
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Tim2723
The Moon Guy
Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
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Kim,
Here is the Celestron eyepiece kit that I bought with my telescope. It is available from different stores and you do not have to buy from this store. If you buy this and the C102HD at the same time, this is only $99!!!
http://www.analyticalsci.com/Astronomy/Telescopes/imagesc/Celestron%20Web/Rebate_GPS8/Eyepiece%20Special.htm
The eyepieces are very good for beginning astronomy, but they are not the best high quality like Televue or Vixen that you mentioned. This is a very good way to get many accessories for a low price when starting out in astronomy.
Tim
--------------------
Intes MK-66 Deluxe (6" f/12 Maksutov)
Celestron C-102HD (4" f/10 achromat)
Celestron C-102AZ (4" f/5 achromat)
Orion 6LT (6" f/8 classic Newtonian)
Orion Apex 90 (90mm Mak spotter/grab-n-go/little fun scope)
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Anonymous
Unregistered
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Hello Kim,
Imho, you chose wisely!   
With a full 102mm of Clear Aperture, this scope will provide beautiful images with nice refractor sharp, clear and contrasty, detailed views of the Moon, planets, globular clusters, binary stars and the brighter Messier, NGC and IC objects with pinpoint stars that look like diamonds on a black velvetty background.
How do I know? I`ve had a C-102 for 6 yrs. and it`s still as good as new. I can`t recommend it highly enough. It gets good reviews all over the internet like here,
http://www.excelsis.com/1.0/entryvotes.php?sectionid=12&entryid=65
and here,
http://www.cloudynights.com/reviews2/starmax-c102.htm
and here,
http://www.cloudynights.com/reviews5/c4r.htm
Good Luck and Clear, Steady Skies!
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Anonymous
Unregistered
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Hi,
A good solar filter to start out with is a glass filter and you can get one from Orion for a fair price.
Joe Donahue
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Jacques
sage
Reged: 08/11/02
Posts: 452
Loc: Belgium
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Hi Kim, I see that you already got great advice. I only want to confirm Dude's point: being a planetary and double star scope, don't underestimate the C102's capabilities on (brighter) deep sky objects.
Clear skies
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Sky-Watcher 102/1000 achromat
Sky-Watcher ED100 (White series)
Orion XT8 (200/1200 dob) Skyquest
Sky-Watcher 250/1200 flextube dob
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StarWars
Mr. Postmaster Man
Reged: 11/26/03
Posts: 22112
Loc: Frost Byte Falls <>
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Kim
Celestron's newest line up to the NexStar GT line offering the largest refractor for the GT series. With a large 102mm aperture, the NexStar 102 GT is fantastic for both planetary and deep-sky objects. This short-tube, 500mm focal length refractor telescope takes you into space with a 20x and a 50x magnification eyepiece. The preassembled adjustable aluminum tripod and quick-release coupling knob make the NexStar 102 quick and easy to assemble in the field.
http://www.telescopes.com/detail.asp?PID=23724
Solar Filters
http://www.thousandoaksoptical.com/solar.html
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Kim
super member
Reged: 04/16/04
Posts: 135
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Thank you very much for answers!
I'm sorry I'm still worry about only eyepieces(finished solar filter).
Hmm buy eyepiece kit is good idea and there are many things with eyepieces,
But only I think those eyepieces has strange Mag. like 250x and 111x...
Then I want to hear about choose eyepiece's Mag. form my first question list.
Sorry
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Tim2723
The Moon Guy
Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
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Kim,
If you do decide on the Celestron kit, it is being sold by amazon.com for $109 with free shipping. Very good price. It does give odd number magnifications, but that does not matter. Most eyepieces give strange magnification numbers.
I am not trying to force you to choose the Celestron kit, but I think it is very good for the price. My Vixen 5mm cost more than this whole kit!
http://www.amazon.com/exec/obidos/ASIN/B00006RH5I/qid=1082431504/sr=2-3/ref=sr_2_3/002-2513891-1116829
Oh, I just remembered, these eypieces are not so good if you wear eye glasses. Do you wear glasses when you use your binoculars?
Going back to your original question, If you buy a Celestron Ultima 12.5mm ($85), and a 2x Ultima barlow ($70)or a regular 2x barlow ($35-40), you will have 4 good magnifications with the 20mm that comes with the scope:
20mm = 50x
12.5mm = 80x
20mm + barlow = 100x
12.5mm + barlow = 160x
--------------------
Intes MK-66 Deluxe (6" f/12 Maksutov)
Celestron C-102HD (4" f/10 achromat)
Celestron C-102AZ (4" f/5 achromat)
Orion 6LT (6" f/8 classic Newtonian)
Orion Apex 90 (90mm Mak spotter/grab-n-go/little fun scope)
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Anonymous
Unregistered
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I have recently purchased another telescope, but my first one was a C4-R from Woodland Hills in California. Great service and a good price at 350.00. Thats a complete setup with a good-working free Motor drive! The image sharpnes is great, and its Magnification holds up to about 200, where I view from. Quality eyepieces complement this scope greatly, I use expensive(but worth it)televue radians. I bought an 8mm and 5mm. These eyepieces are very good, but they are very expensive too, so make sure you like this hobby before you invest in 240.00 eyepieces. I may very well keep this scope, despite my other purchase, it is that good. Great first scope, I would recommend it.
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Anonymous
Unregistered
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Kim,
I don't have this scope, but mine is a similar size (100mm aperture, f/10). As Jacques says, you should be able to see plenty of the brighter deep sky objects. I've had lots of fun with Globular and Open Clusters, Planetary nebulae (well M57 and M27) anyway and even the occasional galaxy.
I would put the books and maps as #3, ahead of the drives. The drives won't help you find things, the maps/books will.
You can also try before you buy with books - get your local library to reserve copies for you. Start with "Turn Left at Orion", I've found this invaluable in finding lots of nice objects.
Good luck - Marc
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