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Dob

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  1. When, that is actually when your scopes will NOT see any light anymore. Also, from now on you will have to report to your new "minister of finance" for every single expenditure you want to make. Good luck anyway.
  2. https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSwvDQBE85Ku9DLhZzvwzVDwwa6ZRVK1t1AaSTg8qDuAsH0B_uBZg
  3. If we are talking about QuickCam 4000 Pro from your signature, then the sensor is on the other side of the 1.25" adapter...but i think you should know that already. Sensor is quite sensitive piece of equipment so you have to be careful with it. The best you can do is to blow the dust off with this.
  4. Well, if your sensor is not clean you will get a lot of strange "objects"... Especially on the Sun and Moon, since they are bright and big every bit of dust and dirt is showed.
  5. If you show your kids M42 nebula and tell them that the nebula is the huge place where the new stars are born, M81&82 galaxies probably lying to each other just like our galaxy and Andromeda galaxy, M13 cluster which contains hundreds of thousands of suns gravitationally bound together, Ring nebula in Lyra which is a remnant of a colossal interstellar event-ashes of a dying star, etc... There are many wonders in our universe other than Solar System. Besides, DSO's are not affected by the seeing as much as planets.
  6. Don't expect astonishing picture on the video either....while it will surely look bigger on the screen, you may not see as much detail as you would see visually. Seeing is a big factor too. The level of detail you can see on a video may vary during the imaging session. From excellent to very poor. That is why in planetary astrophotography video recording is used rather than taking single or multiple pictures. How much you can see changes during time. As the time passes your eye becomes more trained and you learn more techniques and tips&tricks to see more. It was rather funny when me and some of my friends observed Jupiter (they had their first look through the telescope). Great Red Spot was easily visible but none of them seen it, although i explained them where it is and how does it appear. Seeing conditions on a particular star party that you and your family have attended may have been bad. It may get so bad that you really cant see anything, especially when telescope is not "cooled" enough.
  7. Well, a good advice would be to "see what you can see" with the eyepieces you have. Sure, Super 10&25 are not top notch, they came with my Mak127 and i sold them immediately. But only because they were useless to me, since i have already had desired magnifications with other, better EP's. They are surely not bad, but not a "keepers" either. They are some kind of modified Kellners i think. My current setup (with 8" Dob) is: 32mm Super Plossl - i don't use it much, mainly for starhopping, it gives me 38x mag. 13mm Hyperion (which is actually a modular eyepiece-it transforms to 2" 22mm by removing the "Barlow" element) - my current DSO workhorse, it gives me 92x mag. 8mm TS NED (soon to come) - which will give me 150x mag. Link: http://www.teleskop-express.de/shop/product_info.php/language/en/info/p4934_TS-1-25--ED-Eyepiece-8mm---60--Flat-Field---high-contrast.html 6mm Plossl - i use it for planets and Moon, it gives me 200x mag. In the future i plan to replace the 6mm Plossl with a 6mm Ortho. Also, a 25-30mm 2" would be nice. Hyperion when used as a 2" doesn't really shine.
  8. Pacman requires nebula filter, and a dark sky too. I didn't use UHC on that occasion, and LP was not very favorable too. I might as well get my self an airgun and start shooting that pesky street lamps.
  9. Well, that's an accomplishment ! Well done, you can really be proud of it.
  10. Planets as i said earlier. I have 8" Dobs at my countryside house for the DSO's. Anyway, 130/900 is ruled out due to spherical aberration issues, sharp image on planets is my priority, 90/900 too, the seller decided to keep it. I will probably get a Mak 102 and mount in on a photo tripod, although don't know when exactly.
  11. I hope so, weather forecast for my area doesn't look very promising. That would be my 2nd supernova, the first one was really hard to see, mag 13 in M95 under heavy LP from half Moon-a.k.a. The Terminator.
  12. I did consider Mak 127, but there are no any second-hand ones currently. I live in Croatia. i've read somewhere that the minimum f number for 130mm spherical mirror should be F7.5, while 130/900 f number is f6.9.
  13. Hi all, this is my first observing report here. The observation was made on night 28-29. of December 2013., with my 8" "little 8" Dob. Until then i've never done any systematic observations, but for that particular night i've prepared a list of objects to be seen. There were some 20 M's and NGC's combined, but when i arrived to my observing site (a countryside house, not much LP) i realized that i have forgotten a list of objects at home. Alright, not the first time it happens to me, i always forget something. So i had to improvise. I' ve started with M31 and its surrounding, haven't observed them in a while. M31 stretches through the whole field of view of the 17mm Hyperion, but not much of a details (like dark dust lanes etc...) Cassiopeia NGC185, galaxy, mag. 9.2. Averted vision almost not needed. Nice view in 2" 10.5mm Hyperion, bright center and surrounding disk can be seen. NGC278, galaxy, mag. 10.9. Sweet little galaxy. In 32mm SPL appears stellar like, almost like a planetary nebula. Small and unusually bright (for a galaxy, that is). Can be seen with a direct vision, averted vision doesn't show much. I've double checked whether was it a galaxy or a planetary nebula. NGC281 Pacman nebula, Nothing, didnt see. IC10 mag. 10.3 galaxy, Nothing, didnt see. Big Dipper, Ursa Major Well, this is where the systematic "thing" starts. All the suddenly it came to my mind that there are many galaxies in and around Big Dipper, so why not give it a try. M81 and M82 galaxies Until then, i have never seen them. Shame on me, being into amateur astronomy for 3 years and not seeing on of the most beautiful views of the universe. Stunningly beautiful sight indeed. M81 appears like a smaller version of Andromeda, bright center and surrounding disc can be seen. In M82 i could see the dark areas within the galaxy structure. 10.5mm 2" Hyperion shows them the best, almost photo quality. I came to the conclusion that our view of M81 and M82 might be the same as the view of Milky Way and Andromeda Galaxy from M81 or M82, The galaxies can also be seen in an 9x50 finder, so i have used them as an "orientation mark" when starhopping for NGC galaxies around them. NGC3077, galaxy, mag 9.9, right above M81. Averted vision is needed. Appears smaller than M81. 17mm Hyperion is very good on this one. Bright center can be seen, for the moments surrounding disk too. Center appears somewhat irregular. NGC2976 mag 10.2 galaxy, right of M81. Seems to have an interesting shape, similar to M104 Sombrero. Can't see the center. There is a small star on the lower edge of the galaxy, and appears as if it is supernova within the galaxy. An interesting sight. NGC2985 mag 10.5. galaxy, it appeared to me that that it has the "follower" (dwarf galaxy or something like that), but i came to the conclusion that the "follower" must have been a star from our own galaxy. Under this galaxy there are two mag.12 galaxies, but i'm not sure whether i see them or not. NGC3147 mag 10.7. galaxy, a bit harder to find, Stellarium confuses. Averted vision is needed, much fainter the the previous galaxies. It appears as if it is face-on oriented towards our galaxy. NGC2787 mag 10.8 galaxy, above M81&82, nothing special about this one. IC2547 mag 10.6. galaxy, nothing, didnt see. NGC4236 mag 9.7 galaxy, nothing, didnt see. NGC4125 mag 9.8 galaxy, nothing special, bright center and a faint disc. NGC4036 mag 10.6 i NGC4041 mag 11.1., both galaxies fit into the field of view of 17mm Hyperion. There is a slight difference in brightness between two galaxies. NGC4036 seems to be edge-on oriented, while in NGC4041 bright center is visible, not much of a disc. NGC3945 mag 10.6, galaxy, nearby the latter, it appeared to me like M51 galaxy. Cant say much of a detail. Actually a double-barred galaxy, NGC4605 mag 11. galaxy, edge on oriented That was it for the night. There are plenty of galaxies yet to be seen around the Big Dipper. Unfortunately since that night of 28.-29. of December, i had no opportunity for continuing my galaxy hunt. Whether was it bad weather, or other obligations that prevented me from enjoying under night sky, Cheers, Dob.
  14. Hi people, As the topic title says, i need a small and a compact telescope, something that i can easily assemble and disassemble. The thing is, i do have an 8" Dob but it (i like to call it "Little 8") is not very compact nor transportable, considering that i live in an apartment on the 4th floor. So I've moved "Little 8" to my countryside house which is approx. 15Km from city in which i live. From there i observe M's and NGC's (just started systematic galaxy hunt in Big Dipper up to 12th mag. ). ... What i now need is a telescope for casual planetary and lunar views from my apartment's window, that will not take much space in my room. The best choice would probably be Mak 127, but the limiting magnitude here are the financial funds. So far i've considered SW refractor 90/900 and 130/900 reflector. Both second hand. What worries me about 130/900 is the spherical mirror, but yet, it gathers more light than the 90/900. Would the spherical aberration be a big problem for planetary and lunar observations? Thank you for your respond.
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