Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Announcements and News >> Beginners Forum Previous   Index   Next   Threaded   Pages: 1 Olivier Biot Amused Reged: 04/25/05 Posts: 14331 Loc: 51°N (Belgium) Printable versions of Pickering's seeing scale       #1951194 - 10/31/07 03:34 PM Attachment (248 downloads) Edit   Reply   Quote Quick Reply   A wile ago I came across Damian Peach's animated Pickering scale for determining the seeing conditions through a telescope by looking at the diffraction pattern of a star. You need high magnification to see the diffraction pattern of the star (the Airy disk). I got Damian's written permission to make these charts available. Attached to this post you'll find a chart version (PDF, 1 page, landscape). -------------------- Tal-200K (#199) with JMI NGF-Mini2M focuser on GEM3 • Astro-Tech AT80ED on Orion Sirius EQ-G with EQDIR & home made wireless EQDIRECT • Celestron Regal LX 8x42 & 10x42 • Helios 15x70 ATM 14" f/5 (designing mirror cell and filter wheel/focuser) • ATM 10" f/6 Portable Truss (polishing) • ATM 10" f/25 Dall-Kirkham (primary: polishing, secondary: #120 grit) AstroForecast Post Extras:       Olivier Biot Amused Reged: 04/25/05 Posts: 14331 Loc: 51°N (Belgium) Re: Printable versions of Pickering's seeing scale [Re: Olivier Biot]       #1951201 - 10/31/07 03:35 PM Attachment (268 downloads) Edit   Reply   Quote Quick Reply   I also produced a 2-page version with slightly larger images (PDF, 2 pages, portrait), which I attached to this post. -------------------- Tal-200K (#199) with JMI NGF-Mini2M focuser on GEM3 • Astro-Tech AT80ED on Orion Sirius EQ-G with EQDIR & home made wireless EQDIRECT • Celestron Regal LX 8x42 & 10x42 • Helios 15x70 ATM 14" f/5 (designing mirror cell and filter wheel/focuser) • ATM 10" f/6 Portable Truss (polishing) • ATM 10" f/25 Dall-Kirkham (primary: polishing, secondary: #120 grit) AstroForecast Post Extras:       desertstars Deja moo Reged: 11/05/03 Posts: 30032 Loc: Tucson, AZ Re: Printable versions of Pickering's seeing scale [Re: Olivier Biot]       #1951298 - 10/31/07 04:15 PM Edit   Reply   Quote Quick Reply   -------------------- Tom W. SVP8 'She turned me into a 3-legged Newt' EQ Ralph, the All-Purpose 102mm Refractor Under the Desert Stars Alcohol and calculus do not mix. Please don't drink and derive. Post Extras:       NeoDinian Experienced Postmaster Reged: 10/05/05 Posts: 12070 Loc: Rockford Illinois Re: Printable versions of Pickering's seeing scale [Re: desertstars]       #1951299 - 10/31/07 04:16 PM Edit   Reply   Quote Quick Reply   Printed out.. Thanks! -------------------- Neo... (Jeff) -=-=-=-=-=-=- 10" LX200-GPS/SMT UHTC "Draco" Rockford, Il. NeoDinian's Eye on the Sky! Coming soon: Post Extras:       Spaced Carpal Tunnel Reged: 03/01/05 Posts: 1697 Loc: Tacoma, Washington, USA Re: Printable versions of Pickering's seeing scale [Re: NeoDinian]       #1951411 - 10/31/07 05:01 PM Edit   Reply   Quote Quick Reply   Thanks much! I'll use it! -------------------- Mike Look! Up in the sky! _____________________________ XT 10i - the i stands for Telrad Megrez II 80 ED Triplet APO "Punk" Siebert Black Night BVs 8 X 42 Celestron Regals Post Extras:       imeridian scholastic sledgehammer Reged: 08/22/07 Posts: 893 Loc: South Central PA Re: Printable versions of Pickering's seeing scale [Re: Olivier Biot]       #1951554 - 10/31/07 06:08 PM Edit   Reply   Quote Quick Reply   Thanks Olivier, this will make a nice add-on to my little Telrad booklet. -------------------- Zhumell 10" Dobsonian Don't know how to shorten links in posts? Click Here! Post Extras:       Michael Morris Member Reged: 01/05/05 Posts: 1345 Loc: Worcestershire, UK Re: Printable versions of Pickering's seeing scale [Re: imeridian]       #1951677 - 10/31/07 06:59 PM Edit   Reply   Quote Quick Reply   Brilliant. These will get laminated tomorrow and pinned to the observatory wall. -------------------- Michael Morris 8" LX200 classic Orion 80ED ETX 90 (Grab 'n' Go) Observatory Almira Observatory Website Co-author of NightCal Astronomical Observing Calendar Software http://www.nightcal.co.uk Post Extras:       Joe Lalumia Carpal Tunnel Reged: 01/24/07 Posts: 2572 Loc: Rockwall, Texas, USA Re: Printable versions of Pickering's seeing scale [Re: Michael Morris]       #1951686 - 10/31/07 07:09 PM Edit   Reply   Quote Quick Reply   Thank you--=-========== downloaded. Joe -------------------- LX90 8" LNT, SV Nighthawk & TelePOD, SV 80/9D & M4 mount, ETX 90, Orion XT10i, 20x80 binoculars, SV-BV3s. "The hardest thing in the world to understand is the income tax." - Albert Einstein Post Extras:       solshaker Pooh-Bah Reged: 06/06/06 Posts: 1305 Re: Printable versions of Pickering's seeing scale [Re: Joe Lalumia]       #1951698 - 10/31/07 07:15 PM Edit   Reply   Quote Quick Reply   great job. thanks! -------------------- My Gallery Post Extras:       desertstars Deja moo Reged: 11/05/03 Posts: 30032 Loc: Tucson, AZ Re: Printable versions of Pickering's seeing scale [Re: solshaker]       #1971415 - 11/08/07 05:56 PM Edit   Reply   Quote Quick Reply   This thread has been added to the Beginners Forum "Best Of" listing. -------------------- Tom W. SVP8 'She turned me into a 3-legged Newt' EQ Ralph, the All-Purpose 102mm Refractor Under the Desert Stars Alcohol and calculus do not mix. Please don't drink and derive. Post Extras:       CreationAstroGuy professor emeritus Reged: 05/18/07 Posts: 524 Loc: NW WA Re: Printable versions of Pickering's seeing scale [Re: desertstars]       #1985555 - 11/14/07 06:59 PM Edit   Reply   Quote Quick Reply   Thanks! If I get an observatory it is going on the wall ! -------------------- Ryan Nelson 8" LX90 GPS UHTC DSI with a 3.3 reducer Eyepieces; 22mm Nagler, 16mm Meade Seires 5000, 26mm Meade Seires 4000, and a 9mm Burgess/TMB planitary! Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 6 registered and 10 anonymous users are browsing this forum. Moderator:  miniventures, desertstars, werewolf6977, dgs©, ClownFish  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 658 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

Cloudy Nights Sponsor: Astronomics