Jump to content



  • Posts

  • Joined

  • Last visited

Everything posted by N3ptune

  1. I noticed one thing, I have a NPB which is UHC similar has well has a Chinese re branded OIII in 1.25" . The inexpensive Chinese lets more light in then the NPB and because of that, more stars are visible. Visually when looking at both filters, it's obvious the OIII is more light permissive then the UHC (it should normally be the other way around.) At first, I thought the NPB was much better filter but now perhaps 2 years later, I find the differences less obvious. The OIII will show more stars but the NPB will provide a bit more contrast to the nebula, it's more aggressive. NPB wins on nebula; OIII wins on stars so a question could be asked about how much stars and nebula I find the more pleasing to see. To examine that matter further, a filter I would like to try against my existing ones is the Astronomik UHC-E, it's supposed to be good for smaller telescopes then 150mm, it should be less aggressive on the stars too, this can be a good thing on some occasions. https://www.astronomik.com/en/visual-filters/uhc-e-filter.html If my thoughts can help.
  2. Yess! absolutely, I looked at Mars only once in 2018, last week. When I was back from my dark spot at around 1:00, I installed my reflector at home a second time just to look at Mars, it was incredible. There were many surface shades visible with my 8" aperture inside the fairly large disk of course. This is my log of it, not a very elegant sketch and it's only approximative (the eyepiece view observation was way better) but it will show at least 2 major dark spots, mostly in the middle. (I don't have a clue about the name of these features yet!) Has for Saturn, nothing yet, I wait for an opportunity to point the telescope at it!
  3. Wow Reggie your pictures are very good and interesting again ? Like you said, the one without barlow, that's a strong dark shade you have there, it's amazing. I know these are real because I can see hints of them visually, with not too much difficulty. Great efforts with these pictures, and interesting effects with the made in Japan Meade and the ODSC II! Way to go!
  4. Wow I'll remember Jupiter from 2018, that a great opposition it was.. that planet is truly our friend. I had another observation of the same face last night with similar quality has the day I drew that sketch, not has sharp but very impressive, It's because we are closer to it inevitably.
  5. Thanks to you guys. It's true GC are very nice objects, I think in perfect condition, M12 must be a very impressive one, to be discovered someday... I can't easily point out any favourite things in astronomy myself, I find everything equally impressive. Thanks @Ruud glad you liked that sketch of the Glob they are rewarding. M13 M10
  6. Hi, I am publishing this sketch from my observation last night at my very best observing site. I had an Ophiuchus theme to look at all it's interesting clusters. There is a mistake in the title, I have M10 but it's M12, both are 3 degrees apart in the middle of the constellation. The conditions were poor, transparency maybe 2/5 and seeing 3/5, the object at +-35 degrees from the ground approximately. Has usually, I used my 200x1000 Newtonian along with a 9mm Xcel-lx eyepiece, 60degrees apparent FOV, 111x. Even with poor condition the object had a clear and steady globular shape but.. all the small stars usually visible in good conditions were not really visible or steady, no grainy appearance except for the very bright stars. Still, I am very happy with the observation of that object along with M10, The Summer Beehive IC 4665, M14 and M107, all in the same interesting constellation. M12 it's apparently at a distance of 20 760 ly and about 85 ly diameter. Thanks for watching and reading!
  7. heheh it's not a halo it's just the black background to contrast the planet, I drew a gradient instead of solid color for aesthetics purpose only. ?
  8. I found that the light of a flashlight, especially my old Maglite with a light bulb will emit a surprising amount of heat. I put that light close to the front lens of the eyepiece to dissipate dew. It's working fairly fast has a temporary reheating solution to correct a breathing accident or an eye too close to the front lens of the eyepiece. That is the exact flashlight with the xenon lights, old technology but still very good. https://www.amazon.co.uk/Maglite-M2A016-Mini-Torch-Blister/dp/B00002N6SL/ref=sr_1_12?s=sports&ie=UTF8&qid=1528497525&sr=1-12&keywords=maglite+bulb
  9. That's a beautiful setup, a large 10" solid tube with this beautiful Dobson mount and dual speed focuser. Very nice!
  10. I had a strange experience like that a few days ago. I was dark adapted while observing the Pinwheel galaxy, then, I used my red light (which is in fact too strong) to sketch the faint galaxy for a few minutes looking at the white sheet. When I finished, I looked up and all the stars were green like looking at them trough my #56 Light green wratten, Jupiter especially remained green for more then 30 seconds. A strange experience and a bit scary too.. I usually use my very faint red light to sketch, not the very strong one.
  11. I did against all advice myself and I don't see a problem with cleaning the mirrors once per 1 year and something when they have dust on them (maintenance cleaning more then heavy duty cleaning). For my 8" mirror the, price for recoating is about 200CAD with taxes which it's not very expensive... so I keep my mirrors free of surface contaminants, the views are at their best all the time. I cleaned my primary twice in less then 3 years, last clean up was 14 months ago and it's still clean enough has I looked yesterday. Some people say just putting water on the mirror will remove some aluminides out of the surface.. but I visually can't see any evidences of that. The mirror is not perfect from the beginning, if you take the primary out and look at the back pointing a strong light, you will see pinholes and the light passing trough the glass, that's normal. Pouring water on the surface of the mirror doesn't seem to do any damages at all. I put mine in a bowl with mild temperature tap water and a tiny drop of dish soap, let it rest for 1 minutes or so. Then with the mirror inside the water, I pass a medical cotton on the surface to remove the remaining dust, at each pass, a new cotton. Sterile medical cotton without lotion in scaled packaging, with no abrasive inside. Then rinse of the mirror with tap water and final rinse with distilled water, like 2 liters or so. After that I blow some air on it to move the remaining drops of water out of the surface. The final result is always impressive, without scratches and the views in my telescope are always optimal too. Different school of thought, I think dirty optics will eventually cut the resolution in the views. Usually after a bit more then a year of using the telescope once per week, it's full of dust, pollen, cat's hair, etc. With a cleaning per year and a half or so, it will prevent coriaceous dirt accumulation, it's very easy to wipe out everything out of the surface, and the optic look like new all the time. --> I speak for a commercial SkyWatcher mirror with a protective coating on it.
  12. Some sketches of my latest observation at one of my favourite spots! While preparing my observation with Stellarium, surprise! the International space station passed at 21:41 and visible for nothing less then a total 6 minutes, I had to try to look at it, It turned out to be a success with my 200 x 1000 on EQ5. The station was easy to spot in the sky, not too easy to track but far from impossible. The finder has to be well adjusted and the eyepiece at the right height.. at the exact time, the station appeared in the sky! not far away from Venus. I had a 18mm eyepiece installed on the tube to give me 55x, naked eye the station itself was quite red, almost has red has Mars but 1/2 the brightness of Venus. It was easy to catch with the finder and the structure was almost visible at 9x. 55x revealed the structure easily! 4 solar panels and a very bright light in the middle (perhaps reflection of the sun on the shiny finish?). The panels were reddish, brownish, the exact color has the pictures we see all the time, they were big enough to see them clearly. With that much success, I had to swap the 18mm for the 9mm, wow! details were even better but the station was now very hard to track. These sketches were done by memory after the observation, it looked pretty much like the B sketch. The image is from 111x and in reality the object was perhaps 1/2 the size of B in the FOV and crossing the whole 0.5 degrees TFOV of the EP in less then 2 seconds. --> But, the real photons from the real space station! ? It was worth the preparation. Next time, 80x would be a better choice then 55x or 111x and perhaps an eyepiece with 82d (or more) instead of 60d would be of great help. ================ Next is the NGC 4605 a small galaxy in Ursa Major, close to star #76 (or Megrez), with a magnitude of 10.8, according to Stellarium. I found it easily to locate with the 8", of course it's a dim object but visible directly, better with averted, no visible galactic core. The angle was obvious has my sketch, I found it at 29x with 6.8 exit pupil but it's exam was done more at 111x, has well has the sketch. A nice little faint galaxy. Then the massive Pinwheel Galaxy ?, usually hard to see at home because of it's very faint surface brightness.. I found it instantly last night.. I think this one is very sensitive to atmospheric conditions. I had the chance to see how big it was again with maximum exit pupil of 6.8mm No specific details available, only a large gray smooth blob.? Many stars are missing in the sketch because of the wind I had to hurry... but well, it was nice to look at. Using the 200x1000 Newtonian + 34mm eyepiece. I hope your liked my sketches! ================ All these events were really impressive but the very highest point of the night was the Hercule cluster at the zenith?? I never ever saw that much stars in it, it was absolutely GIGANTIC at 111x, 0.5 degrees TFOV in a 60 degrees AFOV a perfect fit in the FOV with an amazing resolution (especially with that much power.) By far the greatest views of this cluster I ever had, doing "waaaaaee"s alone in the dark. M92 the other beautiful cluster was equally incredible, both showed an unprecedented amount of stars. 111x is truly a perfect power for both of these objects. Memorable observation, 2018 so far is my very best year (; Thanks for your time reading this.
  13. Inspiring work, your platform is simple and it looks very good too. (paint matching your telescope) Thanks for sharing this awesome work!? I keep it has an example for my own equatorial platform project one day.
  14. @mark81 It should happen to you eventually! @Dave1 @mariosi Thanks (; @RobertI and @Stu I believe it now these hazy nights can be good! That's a new atmospheric factor to monitor from now on. Just fort that, I created a new log sheet with a cloud section on it so I can input cloud data has well has seeing and transparency. It should help. It's perhaps my 6th model of log sheet in 3 years and by far my favourite to this day. I suspect the new eyepiece is playing a key role in this too, the new Orthoscopic with a magnification of 167x, I normally use 212x or 143x. The new one is almost in the mid point of that (the real mid point would be 177x), it's pushing the maximum power while retaining the maximum resolution, 212x is always a bit too much for Jupiter and other planets except the moon.
  15. I already had a 32mm Orion Q70, I hear they are very good with slow telescope.. Me with my fast F5 Newtonian, I found it to be full of aberrations and I had to replace it after 12 month of utilisation with a Explore scientific 34mm 68 degrees which is much much better, both can even compare. 34mm is a bit heavy, around 698g but totally a keeper and more then half the price of the Panoptic 35mm (some say, for similar results) Although, I don't know how it would be with a refractors telescope. (probably very good ?) I asked about the 62 degrees ES here in the past and they are not has appreciated has the ES 68 degrees or ES 82 degrees series. Today even with a slow scope, I would not buy the Q70 series a second time. The 38mm should have a wider true field of view then the 32mm? My current favourite wide field EP.
  16. At higher power like 143x 166x and 212x on the moon, I observe with 2 strong LED flash lights one pointing the tube and the other one pointing the back of my car (or even better the light of the house). Using a color filters can do a good job at dimming the light too, some colors are very nice to use with a bright moon. I have a Orion variable polarizing filter but I hardly use it now because it's cutting too much overall resolution at higher power, it's a double filter but with a low power eyepiece like 40x, 50x it's quite good. Problem is, I seldom look at the moon using low power. ? My variable polarizing is always in my filter case.. I feel safe owning one. If you think the moon is too bright for your taste, just get moon filter.
  17. Planets here are at about 80° high at the highest point, so it's at the optimal viewing position so I had those kind of views a few times this Jupiter season. Nice picture, you also have details of the 2 moons which is of high value too impressive details. @ 80 degrees high that making thing even more interesting ?
  18. @MarsG76 My best view of Jupiter was through my 14" dob at 480X.. the amount of detail was staggering, I was lucky enough to see the GRS with shading with it.... ? Wow a crisp 480x I believe you, the planetary experience of a life time without a doubt. Do you have a sketch of that? @Alan White Clearly its made an impression with you. That sketch is amazingly good, nice detail . Thanks! totally yes I am still impressed tonight, 1 day later and I had a good day at the work too. (Usually I am good at work the next day following a good astronomy session ?) @Stu It was about time I get good quality views of Jupiter, It was worth the time and the observation was very fast too.. perfect fast executed polar alignment.. perfect temperature, not too much mosquitoes, impressive collimation. comfort at the eyepiece.. it felt almost strange, too perfect. ? @geoflewis Visual + sketching is a strong experience. I believe taking good shots and doing an impressive processing work must provide the same kind of satisfaction too. @ruud Oh my god a medal! ? thank you (; Wow that thread was popular all because of Jupiter! ? Thanks for all the kind messages and for looking at my sketch.
  19. Has the topic, in 3 years of astronomy this was the most impressive observation of Jupiter,( the face without the GRS) a very important event for me! The conditions were visually looking pretty bad with a low water vapour haze 10 degrees high from the ground, there was even a halo around the moon ? what do you know..? Jupiter was a bit over that blanket of vapour. The planet details were clear like crystal and very stable, the observation was done with my new very best friend, the incredible Fujiyama 6mm HD-OR. I think the atmospheric condition will play so much in the equation, for the amateur with small telescope, more then aperture probably, it's all about the right conditions. This is my sketch bellow, the log of that incredible observation and my most detailed sketch up to this date, done with the 200 x 1000 Newtonian. For a part of the sketch, the 80a filter was installed at the eyepiece to enhance the brown parts of the bands, it gave good results while cutting a bit of overall resolution. There were 2 very large festoons, blue clouds, illustrated in my sketch and some very obvious dark spots all around the bands, an impressive definition of each bands including the secondary bands, they were incredibly visible. This is it! ? I hope you like the sketch, thanks for reading and watching
  20. Thank Ronl for the kind comment on my sketch, I am glad you find it well captured ?. For unknown reasons, I like that one, It's the result of me thinking small and simple. Small and simple but there was a result at the end of the day. ? Yessss!
  21. Thanks I have an EQ plateform project in mind too, for a dobson based I don't have already. ? I'll actually spend the time reading your document you published there, it looks complete too wow, thank you very much.
  22. Thanks for you kind comment on this small sketch, really appreciated. @mikeDnight I should get back to the terminator line soon to produce something with more details more shades and use the darker pencils a bit more! ? has soon has I can.
  23. My vacation is almost over but I had a good time and did astronomy on 4 occasions in 7 days, which is very good for a week! (; It was all about Venus, Jupiter, the moon, and one observation out of 4 were done with my new Orthoscopic 6mm which I received by mail. À Great end of vacation gift! I spent some time attempting to sketch of a few craters, the pale and one is called "kies" It's close to larger crater Bullialdus in the Mare Nubium. This was of course a perfect exercise with my new OR-HD 6mm @ 167x total power the resolution was impressive. Also an observation the same day I received the eyepiece, it's double the joy. ?? I wanted to have a simple scene and from time to time, a low contrast crater is fun to look at, the 2H pencil was used extensively in this sketch, it was very pale (and still is), I even had to adjust the "level" a bit in Gimp. 200x1000 Newtonian from 167x, no filter. I hope you like this one! Thanks for looking.
  24. @Geoff Lister If you need to stand during observation of the Zenith with your 10", do you use a chair like this one bellow? they say it can be has high has 33 inches from the ground. This Vestil chair we are looking at is the lowest priced one on this list and at first glance it does tick all the boxes for what you would want in a good adjustable astronomy observing chair. The seat can be adjusted from 18 inches all the way up to 33 inches so it going to be very easy for you to adjust it so that you are nice and comfortable. It can take up to 300 pounds and when you are not using it, it can be folded up flat and stored away somewhere out of the way. @vlaiv Thanks for the links, I started to look at them, Ill do this over the next days slowly but I see many good points about these dobson based telescopes, they seem to have a good reputation. But ? looking at all the factors and everything, I am stonewalled by one odd particular thing, has a "do it yourselfer" and a pessimistic type of person, I have a bad feeling about ordering electronic spare parts from Skywatcher, for the Goto/tracking system. Considering the electronics only are worth almost 1000$ stock with the scope, the trouble of maintaining these for a lifetime seems impossible, while the mirrors and the rest of the telescope can probably last for many decades. Mirrors can be re coated.. but ordering a remote after 20 years, not very likely. Just thoughts.
  25. That's a very good idea ?, I want to build my own eye guards with inner tubes, they come with special glue, the one used to patch the tube in case of a puncture? I believe I can build some good eye guards with that and self adhesive felt. Thanks for that Idea. ?
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.