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Found 48 results

  1. Hi, I was asked on a Swedish forum to put an "Astronomical Dictionary" on my homepage. I have made a test page in an easy form. Astronomical related words linked to wikipedia. It aims to the beginners in astronomy so it should not be too complicated words. http://astrofriend.eu/astronomy/astronomical-dictionary/astronomical-dictionary.html Let me know if it's useful and and I shall add more words. /Lars
  2. Hi all, was just going through the garage to find something and had come across my dads old Celestron telescope the ,model of the scope says it’s a 21066 wos a. The focal length is 900mm and aperture is 2.3”. Was wondering if any of you knows something about this telescope? I’m guessing it’s not that great. here’s a few pictures of it. Olly.
  3. After a lot of work collimating my ES PN 210 8" Newtonian (made it in the end!) I got to thinking of replacing the collimation screws with screws with like small handles or wings. Handles on the screws that are bigger than the knurled screws would also provide more precision. ES have ignored me. I could pull one of them out. But I wouldn´t know how to read the threading. Does anyone know the specifics of the collimation screws provided with the ES Newts? Any ES Newt owners out there? Clear skies Bjorn
  4. No doubt many of you already know about this but I came accross this free ebook and I thought some of you might be interested ... The book has 188 pages and includes around 70 odd black and white images of nebulae and clusters captured in the few years at the end of the 1800s and early 1900s. One example is plate 55, the Trifid Nebula The ebook can be downloaded for free from : http://www.gutenberg.org/ebooks/36470
  5. hi.. I heard someone make 16" reflector with firex glass. my wonder is this could be realize with just one man's hand? i think this would be very precise curve. can hand made would be good? and if yes, how? thanks
  6. Hello Everyone, I am nearing the time when I would be getting my first ever telescope through a friend from UK who'd be visiting Pakistan in a few weeks time. So I have to finalise my decision as to what am I getting during these days. I have been stargazing for some time now. I have done it through my own eyes for a start so far and I must say that it has captivated me already. I was thinking about getting a good binoculars for the sheer excitement of it but then I cannot wait to use a telescope so I have decided to bypass the binoculars and get myself a telescope. I have done my bit of research so far and I kind of know what I want yet I just want to be sure that what I am getting will not disappoint me and therefore need your kind advice in letting my know if what I am about to get for my stargazing would actually fulfil my gtarzagin 'needs' and I call them needs because I do not want to compromise too much on these. So my needs or shall we say requirements are as under: 1. DEEP SKY: I am deeply interested in the deep sky. So you can call me a DSO person. I do not want sharpness of the view for the moon or planets I can compromise on that for as long as I can dive deeply Therefore refractors are out of question for me. 2. TRAVEL: While I would use the telescope mostly on my roof top however which is in the city and so I plan to visit two other locations where I would be taking the telescope along. (a). I plan to go to my father-in-law's apartment at a hill station located at the foothills of the Himalayas called Margalla hills (6000 ft high) twice a year maybe once and (b). to the village of a friend that lies at the base of the Malakand hills which are the foothills of the Hindukush range. One location is just a 40 minutes drive whereas the other is 4 hours away. So portability is there and also durability. These are the two 'needs' I cannot compromise on or would not want to compromise upon. Therefore, what I have in mind is as under: (BUDGET: I cant go beyond 100-120 Pounds maybe 140 Pounds max.) - A Newtonian Reflector within the 114-127 mm aperture range. - I do not have a clear idea of the focal ratio but my research tells me something under 10 is good perhaps near to 5 being great. Is that correct? - I think the telescope should have a parabolic lens ? plus the lenses need to have a coating of some kind for durability ? - An Equitorial mount is best ? if yes, I shall be getting that (I have no interest or budget to go far the motorised ones. The go-to ones. Kills the fun and excitement of locating something yourself through star charts etc. By the way I have downloaded Stellarium on my computer and am getting familiarised with what I behold when I look upwards I saw the Celestron Powerseeker 114 but it had real bad reviews. There is one made by MEADE which is a short tube 127mm and the short tube is good with portability. Similarly there are other options available. Anyway guys, based on the above, what do you recommend? And please no refractor related advice I will be getting a reflector and that is for sure. But which one would suit my needs best is what I am confused about. Kindly enlighten me... Regards, Sidd.
  7. Hello All, Today I am going to the shop to buy either the 150p or 200p. I am interested in visual only and I am going to start with lunar observing . I want something I won't be bored with in three months and something that I can manage weight wise so that I will be able to take it outside with not alot of effort. I am sure you guys have either been in this dilema or know someone who has, I was leaning towards a 130p for a light G&G but I want as much aperture as I can manage. I have read in other posts ,as far as newts go ,that the 200p is the sweet spot in the lineup is this true? Thanks in advance for any help you could offer. Mike
  8. Hi All I’m considering purchasing an 8”aperture, f3.8 newtonian ( primarily for EAA) from Orion UK and would appreciate any input or feedback from anyone familiar with the product, the company or the purchasing process - and how to assess the compatibility with my current cameras. This is would be a step up from my current equipment and entails selecting components that I’ve never used and know little about such as a rack and pinion focuser and components (ACU-3L), and coma corrector (Wynne Corrector). I’ve added links to these items below. I’m also feeling unsure of how to mate up my Zwo 178 and 294 cameras to the 3” focuser and whether there will be an acceptable match between the scope optics and my sensors. I’m sure the folks at Orion UK will assist with all this but I’d sure welcome input from the Stargazer's Lounge community before starting the dialog with Orion UK. thank you in advance for any help you can provide! Gary ACU-3L Focuser selection Info: https://www.orionopt...sers.html#ACU3L Wynne Corrector selection Info: https://www.orionopt...torsfittin.html
  9. Hi! I am very new to SGL (just signed up a couple of mins earlier) and to astronomy as well, though I have been facinated with celestial bodies since I can remember. I recently purchased a Celestron Powerseeker 127EQ but now I’m having troubles using it and I can’t seem to see anything through it. I also have a Celestron collimating eyepiece but I still can’t seem to make it work. Anyone here who has experience with the same scope? Would appreciate if we could chat a bit as I would be really interested in your experience and how you ultimately made it work!
  10. Hi All, I purchased a GSO 6" f/4 Newtonian "Astrograph" late last year and eventually found that stars on one corner were egg shaped while taking images. I narrowed it down to improper centering of secondary mirror from the factory and resulting tilt. Long story short, after numerous iterations, I used the Advanced Newtonian collimation technique by Astro Shed guy and ended up with the below pic of the optics. Does it look ok or do I need to do more? I will be checking with a Howie this weekend too.
  11. Greetings stargazers, I'm considering buying a new telescope (my first telescope) for astrophotography, and some visual astronomy. But I can't decide which type should I get. I mainly want to photograph deep sky objects. After testing some variations in Stellarium I am worried that some deep sky objects won't fit into the aperture of an 8" reflector. I'm wondering which type should I get. And also I'm worried that I won't be able to photograph anything with a small refractor because I live near a city. I am also open to any suggestions for a beginner astrophotography telescope. (around 800$ would be perfect) Thank you:) I apologise if I made any writing mistakes. Edit: I'm considering buying a Bresser Messier 203/800 or a William Optics Zenithstar 61 but I'm still open to any suggestions.
  12. Good evening everyone, I'm looking into buying my first telescope. Interested in planets and DSOs. I've narrowed it down to 2 scopes: the Orion SkyView Pro 8" reflector and the Celestron Omni XLT 150 refractor. A few people on here highly suggest the SkyView pro 8", but I'm curious as to how much maintenance is going to come with it? I'm American living in Sicily, so it's not easy for me to go to a shop and ask for help! From the price and high ratings of it, it's very appealing. But on the other hand I understand the refractors require almost nothing, just keep the lens clean. Any comments?? Thanks
  13. When the barrel of my meridian 675x4.5" reflector telescope falls below around 30 degrees it just falls down, and will only come back up above 35 degrees. This makes it impossible to observe objects towards the horizon. Any help would be much appreciated.
  14. Been waiting for days in anticipation for the first clear night with my new SW 200P reflector and HEQ5 mount. I found instantly that I couldn't locate the North Star due to bloody trees and also the moon was so bright it made all other objects so much more dim in my scope. The Polaris Alignment scope LED's are so bright I couldn't align any star in the scope at all, let alone see through it. I did check it was clear and it didn't have the cap on or the weight bar obstructing it. I tried adjusting the brightness but found no settings in the SynScan handset for my model! I also found out that my clock ring rotates even if I lock them to the specific axis. (Annoying) In the end, instead of just messing around trying to align the damn thing I just span it around and zeroed in on the moon and other stars. I found pretty quickly that I can only focus on the moon IF I use a 2X barlow lense in the chain and that the focuser doesn't move back as far as my older Vixen refractor. Anywayyyy to make the most out of the full moon and the fact it was clear I took some photos and made a mosaic out of 54 individual photo's I took. The original photo is 388MB, so I've uploaded a much smaller version. My first proper AstroPhotography photo, any thoughts or solutions to the problems I found on my first night out? I'm hoping the next time I go out, it's much smoother. Enjoy. - Pesky
  15. Good evening dear members. Could you please help me choose a telescope: I would like to be able to see nebulae, galaxy, star clusters for example, and surely Jupiter, Saturn, To start first: I can spend 400-500£, I understand this is not much, but for now I am ready to get started. My wish is to photograph as well, but in a distant future, like 2-3 years from now, because when I look at my mother's pictures I understand -this is what I would like to do. Obviously the outcome will be different if I choose for viewing or for photography. I was advised a Dobsonian will be good for viewing DSOs, and a refractor for photography. What about reflector telescopes? I have found one Bresser reflector telescope (Bresser Messier AR-152S/760), is it any good? If I will find a decent telescope what upgrades will I need (lenses)? Your help is very much appreciated. PS: I live in Haslemere, Surrey, the sky is not as polluted as in London, where I used to live. Lovelight.
  16. Hi everyone, I'm looking to buy an 8" newt for astrophotography with my Canon 6D full frame. I'm really only going to be using it for imaging so visual problems (such as back focus) aren't too much of a concern for me. I'm aware that probably whatever scope I get won't cover a full frame sensor without vignetting, but does anyone have an opinion on which would be the best? I have a CGEM mount and Baader MPCC mkIII. The ones I've been looking at right now are: 1.Orion 8" f/3.9 Newtonian Astrograph 2.Astro-Tech f/4 Imaging Newtonian I've also heard of the Sky-Watcher Quattro series and Meade LX70 series, I just haven't heard as much about either of those. Also, optics are my #1 concern. Things like weight or minor mechanical shortcomings that I could potentially fix are not as great factors. Thanks for your input! Patrick
  17. Hi again About 2 years ago i built a 4.5 inch ultralite fold out travel / hiking Dobsonian. weighing in at about 2.5 kilos with eyepieces, collimator and tools. Here is a link to a Thread about the 4.5 Dob - http://stargazerslounge.com/topic/237230-45-compact-travel-scope-for-hiking/?hl=compact This works well but i always felt i could get it lighter and more compact when packet down also me loving building scopes so much i will find any excuse to build another one. This time i have decided to go all metal. Mainly using Aluminium. i want to design the dob as minimal as possible. All i need to do now is design the mount. probably something very simple. here are some plans and some of the build so far. thanks for reading. Pete
  18. The awful seeing conditions continue where I am but I at least managed to get this in between the clouds last night: Details: Tasco 302012 114mm reflector telescope. Afocal through 40mm wide angle EP with Canon HF100 Camcorder. 9 Second movie clip at 1080p 60fps stacked in Registax 6 and processed in Photoshop CS3
  19. Hope someone with more experience than I, which basically means anyone that has successfully collimated a Newtonian, can answer a couple of compound questions I have based on my first and only attempt at secondary collimation of my SkyWatcher Flextube 250. 1) All three of my secondary collimation screws were extremely snug before I did anything and I was only able to comfortably turn them counter-clockwise. Is this normal? Do I need to loosen all three screws first before I can properly start collimation? Should I be turning any screw beyond "snug"? 2) Before collimating, I placed a yellow sheet inside my OTA opposite my focuser tube and I placed a red sheet between my secondary and primary. The view this gave through my focuser tube was of a red circle surrounded by a partial yellow ring (the secondary mirror stalk blocking a portion of this yellow annulus). While independently turning each of the secondary collimation screws counter-clockwise I looked down the focuser tube (both with and without a sight tube installed) expecting to see some change in the shape of the red area (more or less circular) and/or the yellow area (less or more even thickness). I turned the screws no more that 2 complete revolutions. I did not perceive any appreciable difference in what I saw and I turned each screw back (clockwise) to their original tightness before working with another of the screws. Does it make sense that I didn't perceive any change? Should I have turned the screws more revolutions? Should I have loosened more than one at a time? Very confused and looking for your help. Thanks
  20. This has been sat boxed up in my garage for a couple of years now since moving to a town with lots of trees and light pollution! It's in great condition optically and physically other than a scratch on the outer paintwork that it's had since I got it (see the bottom picture). Comes complete with tube rings as seen on the pictures. Buyer can collect or I can meet at the Kelling Star Party with it as I'm only a few miles down the road. Reduced to £160. Bob
  21. Hello,i'm gonna buy the skywatcher heritage 100p(dobsonian reflector).Many people say that one of the first things you need to do is to collimate your telescope even though you just received it.Please tell what to do is this necessary and how can i collimate my telescope easiy if needed?
  22. Hello All, I recently upgraded from a department store 50mm refractor and got the Celestron Powerseeker 127Eq, but after researching a bit more, I have found out that there are problems in the design of this reflector (Barlow lens built-in). I am currently comparing the Meade Polaris 130EQ, Celestron Astromaster 130EQ and Meade Polaris 127EQ. I just need to know any important details about all 3 of them and know which is the best choice (mount, its setting circles, optics, EPs, etc). I want to know if there are any design problems that come with it (like the C P 127EQ). I would be also be glad to know about how well these telescopes can track celestial objects and if their setting circles are accurate. I know these are a wholesome amount of question, but this will be my first "real" telescope and I hope on using it for the next couple of years, Thanks a lot!!
  23. Hello Dear Friends(I have two!) and Community, I acquired this lil guy over the weekend. Like many other users I had been hesitant about a reflector (collimation, and whatnot) but at 22 Euros I could not pass. Actually I simply wanted the mount (my first manual EQ!!), as it looked to be good for my starter needs. Now the data plate (real thin sheet steel!) says it's a Revue, (an old German optical/lens/eyeglass company I believe) however it's got a Japan label elsewhere and my guess is it's a re-badged Vixen. Am I right and would anyone like to enlighten me on what a gem or stinker it is? I gave it a nice cleaning (simple green, damp cloth) and used a hair dryer to hopefully loosen and rid it of cob webs that were inside (not a lot but I certainly could not there in there). Btw: What are the Dec and RA knobs normally called? I love the tiny bulb lamp (works!! 2xAAs) Last but not least the EPs (5,10,20mm) came with one each screw-on sun and moon filters (How cool is that!!!?) I appreciate all insights in advance! John
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