Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Rocket_the_Raccoon

Members
  • Content Count

    103
  • Joined

  • Last visited

Everything posted by Rocket_the_Raccoon

  1. From the album: Rocket's Album

    the 1.25" end, made with DWV plumbing part - an ABS 1 1/4" female trap adapter
  2. From the album: Rocket's Album

    made to decrease the optical path from the eyepiece field-lens to the focuser in order for the telescope to focus at infinity
  3. Hi! Darknight, I simply use the "hole" where the eyepiece retainer screw was. The tiny diameter helps dimming the LED light further and its location is right below the cross-hair. In short, I painted the LED red, put 2 layers of CTO gel in front of it, then glued the light onto the hole. Finally, I wrapped some black electric tapes around the base to "seal the leak".
  4. Just a little sharing, nothing fancy :-) Ingredients : 0.965" Star Diagonal, Eyepiece from 5x24 Finderscope, mini-LED Flashlight, Tamiya X-27 Clear Red Model Paint, CTO Photographic Gel All items except the LED flashlight and model paint were readily available at home. The eyepiece is probably a ~20mm Ramsden (as the cross-hair is in front of the field lens). The cross-hair is "focusable" by a generic helical mechanism. Due to the long focal length, it is used for piggy-back wide-field photography unless a barlow is inserted in between the diagonal and the focuser. It was used on a 25+ yesrs old 60mm f/11.7 refractor before I bought an used 70mm f/13 (which now I need a 0.965" to 1.25" adapter)
  5. From the album: Rocket's Album

    Attached on a 25+ years old 60mm f/11.7 refractor...
  6. From the album: Rocket's Album

    Ingredients : 0.965" Star Diagonal, Eyepiece from 5x24 Finderscope, mini-LED Flashlight, Tamiya X-27 Clear Red model paint, CTO photographic gel
  7. Hi! Shyam, When you magnify an object in the sky by 100x, you also "magnify" the atmospheric disturbance by 100x. Given a precisely collimated optical system, high power viewing still requires very stable atmospheric condition (a.k.a. good seeing). Thus, please keep in mind that there will be times your high-power eyepieces have no use (even make things worse). Also, for the same reason, wait for a night with good seeing to give a final evaluation of your newly bought high-power eyepiece. The difference caused by seeing can be very dramatic! Finally, remember that short focal length eyepieces of most classical designs (e.g. Kellner, Plossl, Orthoscopic, except Konig) have very short eye relief. They are not unusable but certainly would give inconvenience. Despite that, I have a 6mm Orthoscopic myself and is one of my favourite in viewing Jupiter. To the extreme end, I have a 3.6mm 4-elements eyepiece with unknown design but I seldom use it.
  8. Hi! Mark, One thing haven't been mentioned yet is eye-relief. All your eyepieces have relatively long eye-relief's because of their focal lengths. Using a barlow with them would basically retain their comfortable eye-relief's. Of course, there are short focal length eyepieces that have long eye-relief's, but "Short FL" + "Long Eye-Relief" + "Sharpness" + "Contrast" + "Wide AFOV" = "VERY EXPENSIVE" :-) Personally, I uses a Meade 3x Short-barlow + basic Plossl 10mm on my portable 70mm f5.6 for planets and doubles. P.S. The Meade 3x is actually a ~2.7x
  9. Saw Mercury for first time in my life!

  10. Does anyone know about this OTA? I came across it on Ontario Telescope website (http://www.ontariotelescope.com/Antares-80480-refractor-OTA_p_115.html). It seems a better deal than the well known Orion Short-tube 80mm f5 beacause of the 2" focuser which would give 100% illumination on the DSLR sensor. Unfortunately, not a lot of info./reviews can be found on the Internet. Could anyone offer some opinion? Orion Short-tube 80mm f5 + Skywatcher Mounting Rings = $212CAD (incl. tax+shipping) Antares 80mm f6 (incl. mounting rings, dovetail, 2" mirror diagonal, 2"-1.25" adapter) = $240CAD (incl. tax+shipping) Thanks!
  11. Waiting for a clear sky again...

  12. Beside the moon and the planets, many double stars are well within the resolution capabilities of small telescopes. Here are two: Mizar in the Big Dipper - Mizar and Alcor is a pair of naked eye double but Mizar itself is a double too. Mizar-A and -B are separated by 14", a low-mid magnification of 40X would be sufficient to split them. Castor in Gemini - the right "head" of the twins is a triple. Castor-A and -B are separated by 4.8", you would probably need 100X+ to split them. Castor-C is 70" away from the pair but it is much dimmer (at magnitude 9.8, compared to 1.9 and 3.0 of -A and -B respectively). It is a challenge for small telescopes. Just observed the two above with small basic equipment: 70mm f5.7 Refractor Red-dot Finder Plossl 10mm Modified Achromatic 3.6mm EQ-1 Mount
  13. Last Night of Clear Sky before the Rain

  14. The two brightest objects currently in the evening sky (I live in Canada), Venus and Jupiter, make aiming and locating M45 and M44 easier than ever! M45 - currently very close to the path of the setting Venus. Though M45 is an easy object to locate without the aid of the planet, for a heavily light-polluted urban evening sky where one can barely see Orion and Aldebaran, Venus is surely a great help. M45 is best enjoyed with the lowest magnification, one can only barely fit the whole cluster in a 1.25 degree field. (More info. https://www.britastro.org/event_render/5953) M44 - located in the relatively dimmer constellation Cancer. Finding it in a light-polluted urban sky can be a challenge especially you have a red-dot finder or a relatively useless 5x24mm. Fortunately, Jupiter is now only 5 degree away from M44, one can aim at Jupiter and then carefully hop to the cluster with the lowest possible magnification. Knowing the actual field of view of the particular scope-eyepiece combo. would definitely help. (More info. http://www.astronomy.com/observing/sky-this-week/2015/04/april-312-2015) For your info., I just observed them with small basic equipment.... 70mm f5.7 refractor red-dot finder Plossl 25mm, 10mm EQ-1 Mount
  15. Welcome! The Spaceprobe 3" is a pretty good starter-scope, appropriate mount for its size, good quality eyepieces and a nice red-dot finder. Wish you and your son can fully enjoy it.
  16. Welcome, I have a Celestron Travelscope 70 too. It is a pretty good short-tube refractor for its price. And yes, the photo tripod that comes with the scope is simply "better than handheld". I use an EQ-1 mount with it, more for stability and slow-motion controls rather than the benefit of tracking.
  17. Welcome and agrees with many others pointing out "knowledge is power to overcome fears"...wish you all the best on your journey to the success of overcoming your fears!
  18. Finally, "openings" in the sky that allow photons to come through...

  19. Finally, "openings" in the sky where protons can come through...

  20. Just would like to share my 10-minute DIY eyepiece conversion of an old .96" Celestron circle-V 6mm Orthoscopic to 1.25": thought this might be useful for someone who want to use their good old Orthos. on a modern telescope. :-)
  21. Hello and welcome, I almost thought you are from Canada (we also have a city called Surrey here) :-) I am a photographer too but for astrophotography, I am not even at kindergarten level.
  22. Welcome! ...and very nice images on your site.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.