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Found 9 results

  1. Hi to everyone, I used to do some astrophotography in the past with a Celestron AVX and DSLR but after few month had to give up for several reasons, including light pollution (I'm living in zone 3 east London), and also working shifts. Now I want to start again, and this time more serious. I've been searching around for a couple of months to choose all the gear and I'm quite happy with the list so far although it's a bit over the price I planned at first. I will get an William optics Z73 with his 50mm guide scope, a flattener/reducer 0.8, light pollution filter IDAS D2 and as camera I will use a Canon 600D modded and I will buy a ZWO 183MC Pro, after so much research, I'm very happy with the scale and framing I will get with this combo, but I'm starting to get confused with the mount. My first idea was to go for an HEQ5 Pro, as my previous experience with the AVX has been awful, then I realized that the FLO, sells that mount with belt modification and also some cleaning and tuning if required, I heard that it's a big improvement over the stock one and the price it's ok, but another important factor for me it's portability. Unfortunately, my garden doesn't allow me to do much so I will need to carry around on trolley, for a km walk, I'm a strong person and been doing plenty of time with the AVX, so my confusion came recently when the iOptron mounts entered my radar. I start comparing the heq5 pro with belt, with the iOptron cem25EC and the CEM40 without encoders, and I'm so unsure of which to buy, the cem25 seem to be the equivalent of heq5 at least speaking of payload, but in some threads I read people saying it's a bit fragile so kind of remove it from the equation although the weight it's interesting for my situation, then the cem40, seem to be quite similar on weight to the heq5 but with higher payload and that's interesting too as I will buy a C11 at some point. Now it will all come down to the accuracy of tracking I guess, how the heq5 and cem40 would compare on tracking and guiding? If the cem40 it's better, I would probably go with that since it holds more and would last longer as I don't plan to get anything bigger than a C11, but if the skywatcher it's better, I could decide to go for that, and when I move to a place with better garden then get a second mount with higher payload. Apologise for the long post and my english. Kind Regards, Giovanni.
  2. So i have had my fair share of visual astronomy with my 10 inch dob, But i am no looking forward into the realm of astrophotography. And i don't want to have into the jump into the deep end and by a $1,500 eq mount(yet) i was planning on getting a ed80 refactor and the camera i can get figured out. Is there any (good) budget mounts for dso? I was hoping to find a good mount for around $900. Even though i want Budget mount(or a budget mount compared to a $1500 mount) i do not want to get rid of feature that would keep me from pulling my hair out. Would it even be worth it? Thanks in advanced! I was referring to the http://www.telescope.com/Mounts-Tripods/Equatorial-Mounts-Tripods/Orion-Atlas-EQ-G-Computerized-GoTo-Telescope-Mount/pc/-1/c/2/sc/34/p/116277.uts Looking forward to be able to see nebulae in color(of course after i process it and such)
  3. I understand the purpose of shooting dark frames, but what are 'flats' used for? Is there a general ratio of darks and/or flats to process with the collection of images when you stack them?
  4. I came across a very good article by Bernhard Hubl in the April copy of Astronomy with a lonk to his website. A good article and the website is a beaut too. Thought I would share it with you... http://astrophoton.com/index.html
  5. Hello all, Disclaimer for all: I am still a newbie so good chance this is a bad question, but I was hoping for an explanation anyway. I've got a SkyWatcher 8" (1200mm FL) Dobsonian (manual, no GOTO). So far, I am mostly interested in visual and AP planets. I have recently started gradually upgrading my equipment. Got a ZWO ASI 224MC, and a TV Powermate 2.5x (hoping to get an HEQ5 mount soon too). Here is where the baffling happens. According to math, my scope's potential magnification is 400x (200mm aperture x2). Obviously that is supposed to be theoretical, true only for nights with perfect seeing, and in the past, using a typical 2x barlow and a 6mm plossl, I could touch that 400x (1200x2 /6 = 400) , and my mileage would vary according to seeing, so it verified the hypothesis. Along came my new equipment, the camera and the powermate. The maths for this produce a magnification of 491x (1200x2.5 / 6.1mm) which by far exceed the theoretical maximum. I was, however, able to produce the attached planetary pics, which I think are pretty decent for a manual dobsonian, considering I have still not fully mastered the art of stacking and processing, and the fact that they were taken from within the city (Thessaloniki, Greece). I have also noticed that visually, when using the Powermate and the 6mm eyepiece (500x zoom), it still looks as clear as, if not clearer than the common 2x barlow and 6mm eyepiece combo(400x). So I guess these are my questions: 1. When doing AP, is the maximum zoom we can use higher than for visual, because of stacking, or not? 2. Is there a chance that the TV Powermate can implicitly increase the theoretical max magnification, because of its superior quality? 3. Would adding a motorized mount, enhance the results I get, or have I pretty much reached the absolute max quality shots I can get with the specific OTA? Thanks a lot in advance, Alex
  6. Now surplus to requirements is my AP 0.67 focal reducer. Comes capped - but not originals, sadly - shipped in a large bolt case Price includes insured UK delivery. Paypal (+fees or f&f). Collection from Bedford at suitable reduction £120
  7. Hey guys! It's me ,kronos Yesterday my 8" dob arrived and i had some lovely views with it! I also bought an astroessential t ring for my nikon Dslr. Im looking towards planetary imaging (not serious, just for the fun) what else do i need?(btw my cam is a nikon D7100)
  8. PHD2 has been popping up in various places on this forum, with many if,buts and maybe's. So last night while I was waiting for the clouds to clear, I downloaded and installed it. (I was a bit annoyed at the additional stuff that you needed to install, but hey, if it works it works.) So plugged everything in and started it up. Some of my WOW moments: - The equipment profiles that seem to be pre-tuned. (So plug and play!) - Auto tuning of your camera dialogue and the new darks works great, stars where bright and the background black ... out the box. - The new / updated graphing and the star profiles are very cool. (Still need to learn what all the new stuff means!) - Seems more stable and less resource intensive / laggy. Although when I woke up this morning, it had frozen and so had EQMOD. Was this because it got confused when the clouds rolled in? (The clouds rolled in at about 2am, so managed 3hrs data, all tight 5 min subs at 900 FL, with a 600D and a Finderguider 200FL.) Looking back at last night I have some question for the veterans. 99% of my nudges kept me within 0.5 target on the star profile. I had 1 in a hundred that pushed out, but always below 1. My Dec was buttery smooth, almost no movement at all a flat line, sometimes just below the line and other times just above. My RA was more hacksaw blade, with higher peaks (EQMOD) than what I got with PHD1. How should I tame the yo-yo effect so that it if a flatter line? (EQMOD is set to 0.5 RA and 0.9 DEC, min pulse is smallest at 20) (Avg size RA Oscillation between was 0.2 and 0.3, but some times up at 0.5) Anyway just a big thumbs up to the DEVs and really everybody should give a go, it is super cool.
  9. I have recently bought an HEQ5 Pro mount and was planning to get a SW Evostar 80ED to sit upon it so that I can learn the basics of astrophotography. I've read here and elsewhere that this really requires the SW .85x reducer/flattener to get any decent results, and that all seems to make sense to me. Unfortunately there are none of these flatteners to be had in the UK, so I have postponed my purchase. I do have a SW Explorer 150PL, which has been a lot of fun for the last few years and I plan to rest it on the HEQ5 as soon as those clouds move away, but I don't see it as a great tool for DSO AP (although I will be trying some lunar pictures). Is there and alternative to the 80ED that would be suitable for a beginner for DSO AP? I'm lucky that my budget can be reasonably flexible (in as much as I have considered the Equinox 80ED), but I don't want to throw money at something that would be wasted on a beginner. But my impatience to get started means I'd rather not have to wait a couple of months for SW to send some more flatteners to these shores. I have a Canon 550D DSLR and a Phillips ToUcam PRO II webcam. [Hmmm. Impatience - yes, I know that is not a good trait for AP.] TIA,
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