Page 1 of 2 12 LastLast
Results 1 to 10 of 11
Like Tree37Likes

Thread: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

  1. #1
    j.gardavsky's Avatar
    j.gardavsky is offline Super Moderator
    Points: 110,802, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 94.0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,387
    Points
    110,802
    Level
    100
    Thanks
    14,386
    Thanked 8,774x 5,711 Posts

    Default First light through the 2inch zenith prism on the 6inch F/5 Synta refractor



    Hello all,

    the excellent seeing conditions on the 13th May have been a good reason to test the recently put on service 2” Wild Heerbrugg zenith prism.

    The eyepieces used in the test have been the Pentax SMC XO 2.5mm (magnification 291x, 44 AFOV),
    and the Pentax SMC XW 3.5mm (magnification 214x, 70 AFOV).

    Three targets for the tests have been chosen: Moon, Epsilon Lyrae double-double, and the globular cluster M13 in Hercules.

    The reason for the tests has been to check out if there is any significant improvement of the chromatic aberration (CA)
    and of the spherochromatism on the fast achromatic refractor when viewing the celestial objects.

    Moon

    The Moonwalk has started at north in he Birmingham area, with a stop at Plato to resolve the structures in its walls,
    and continued along the isolated montes at north in Mare Imbrium.

    Further south, Archimedes with Montes Archimedes, Erastothenes and Copernicus have been the dominating craters to spend some time with inspecting their structures into detail. Well resolved thin dorsae in Mare Imbrium and in Mare Insularum towards the terminator,
    and the very small flooded craters in the mare have been surprisingly very well visible.

    The Rupes Recta and Rima Hesiodus in Mare Nubium, and of course the crater Pitatus have been another highlights,
    both of them showing thin black lines with the highest contrast so far I remember.

    The end of the Moonwalk has been in Clavius, which is filled with smaller and smaller craters.

    The both eyepieces have offered through the prism very sharp views with high contrast, and with the resolution of the details comparable to the views through the zenith dielectric mirror when the green Baader Solar Continuum has been mounted to remove the CA and spherochromatism.
    Now through the prism, the high resolution and high contrast in the craters and around, has been achieved in white light without any green filter at all.

    Even if the Pentax SMC XW 3.5mm shows all what can be already resolved, the Pentax SMC XO 2.5mm blows up the finest details into the more comfortable view.
    None of these eyepieces has distracted the view with the floaters, even if I have enough floaters in my right eye reserved for Moon and planets.

    The only CA still visible has been a blue hue out of the rim on Moon in the bright sunshine. Trying the filters in my arsenal, this CA has been suppressed on the both eyepieces with the Baader UV/IR filter (420nm – 680nm passband) at best.

    Epsilon Lyrae doble-double

    The constellation of Lyra has been just rising through the atmospheric haze above the eastern horizon, and the Epsilon Lyrae is one of the classic test targets for the small scopes.
    Pentax SMC XO 2.5mm has easily resolved the both doubles, leaving enough black space between the components.

    Hercules Cluster M13

    I have been quite curious about the appearance of this glob through the zenith prism, have this globular cluster already seen more than 100 times since I am keeping a record.

    Having focused the Pentax SMC XO 2.5mm as precise as possible on one of the both foreground stars,
    I have slowly moved the scope into the glob. It took less time than usual to let the cluster condense into the individual stars. My impression has been that through the zenith prism the cluster stars become better separated, and that an enormous amount of cluster stars at the larger distances from the cluster center became visible.
    As the apparent field of view of 44 is at the magnification close to 300x not enough to oversee the whole M13 cluster,
    I have moved the scope above the cluster, and waited on the cluster to rise and to transit the eyepiece.
    What a fantastic view, I have been enjoying.

    Thank you for reading,

    JG
    Last edited by j.gardavsky; 05-15-2019 at 08:22 PM. Reason: typo
    AbbN, mstar74, DeanD and 8 others like this.
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plssls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
    Astronomy Forum Rules and Terms of Service
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  2. The Following 7 Users Say Thank You to j.gardavsky For This Useful Post:

    bladekeeper (05-16-2019),combat48 (05-31-2019),Gabby76 (05-15-2019),John Baars (05-31-2019),kingclinton (05-16-2019),Makuser (05-16-2019),SpyderwerX (05-17-2019)

  3. #2
    Gabby76's Avatar
    Gabby76 is offline Super Moderator
    Points: 82,882, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.8%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!Album Achievement!50 Posts Achievement!
    Awards:
    Activity & Post & Thread Master
    Join Date
    Jan 2016
    Location
    Slovakia
    Posts
    19,222
    Points
    82,882
    Level
    100
    Thanks
    3,690
    Thanked 5,992x 5,034 Posts
    Blog Entries
    4

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    A fantastic report JG, glad that you were able to enjoy the views as well.
    j.gardavsky likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the eyepiece/ camera. - Gabrielle
    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

  4. The Following User Says Thank You to Gabby76 For This Useful Post:

    j.gardavsky (05-16-2019)

  5. #3
    bladekeeper's Avatar
    bladekeeper is offline Super Moderator
    Points: 303,352, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 100.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Awards:
    Activity Award
    Join Date
    Aug 2014
    Location
    Lowell, Arkansas, USA
    Posts
    38,855
    Points
    303,352
    Level
    100
    Thanks
    29,117
    Thanked 17,661x 12,095 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Great review and report, my friend!
    j.gardavsky likes this.
    Bryan

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/5; Celestron C6-R f/8; ES AR127 f/6.4; ES AR127 f/9.4; Stellarvue SV102T f/7; ES AR102 f/9.8;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MC90 f/13.3;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80A f/5; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
    Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Eyepieces: GSO Super Plssl 40mm, 32mm, 15mm, 9mm; ES 82 Series; GSO Superview 30mm; Celestron Plssl 26mm, 20mm; ES 70 25mm; ES Plssl 25mm; Vite Aspheric 23mm, 10mm, 4mm; Orion Expanse 20mm, 9mm; KK Ortho 18mm, 12.5mm; Bresser 70 15mm; Coulter Optical 12.5mm; BCO 10mm; ES 62 9mm; Zhumell Z Series 5mm
    Binoculars: Pentax PCF WP II 1050, Bresser Corvette 1050, Bresser Hunter 1650 and 840, Garrett
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    1260 LW, Gordon 1050, Apogee 20100

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Galaxy Hunter's Creed - When you play whack-a-mole, sometimes you hit 'em on the head, sometimes you miss 'em. But its always fun to play, and if you don't play, you ain't gettin no moles! - KT4HX

  6. The Following User Says Thank You to bladekeeper For This Useful Post:

    j.gardavsky (05-16-2019)

  7. #4
    DeanD's Avatar
    DeanD is offline HYPER GIANT
    Points: 16,324, Level: 88
    Level completed: 22%, Points required for next Level: 276
    Overall activity: 9.0%
    Achievements:
    365 Days+ Registered Achievement!2 Posts Achievement20 Posts Achievement!50 Posts Achievement!750 Days+ Registered Achievement!
    Join Date
    Apr 2012
    Location
    South Australia
    Posts
    2,364
    Points
    16,324
    Level
    88
    Thanks
    274
    Thanked 731x 595 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Sounds fascinating JG! I assume this is a prism from a theodolite?

    I will have to try a similar test with my Tak 1 1/4" prism vs a mirror diagonal. I'll see what the moon and Omega Centauri can show me...

    Keep up the good work!

    - Dean

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    12" home-made dob, Celestron 150 f5, Tak TSA102, TV 76, Celestron 800CPC, ETX 125
    Mounts:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MiniTower, HEQ5Pro
    Binos: 25x100FB, Carton 11x80, Vanguard Endeavour 1045, Takahashi 22x60, Swarovski Habicht 8x30
    Eyepieces: My favourites are my Televue 32mm plossl, Nagler 13mm T6, Nagler 3-6mm

  8. The Following User Says Thank You to DeanD For This Useful Post:

    j.gardavsky (05-16-2019)

  9. #5
    j.gardavsky's Avatar
    j.gardavsky is offline Super Moderator
    Points: 110,802, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 94.0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,387
    Points
    110,802
    Level
    100
    Thanks
    14,386
    Thanked 8,774x 5,711 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Thank you all for the kind words!

    Hello Dean,

    the Wild prism has been evidently designed and manufactured for the Swiss Army tactical optics,
    maybe like the extra wide field XR Heliflex from Rodenstock, https://www.ebay.de/itm/Rodenstock-X...kAAOSw9wxbkM5S
    The face and the rear surfaces have antireflex multicoatings.
    The prism is isolated from a heat contact with the metal of the prism house, the prism house is a preowned part from TS,CNC machined they say, but who knows, you know.

    The old 2inch dielectric zenith quartz diagonal from TS, accessorized with the filter wheel, is further on service for the diffuse nebulae.

    Best,

    JG

    PS: It is the continuing bad weather offering me enough time to play with the gadgets.
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plssls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
    Astronomy Forum Rules and Terms of Service
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  10. The Following User Says Thank You to j.gardavsky For This Useful Post:

    DeanD (05-19-2019)

  11. #6
    Makuser's Avatar
    Makuser is offline Proud to be a member here
    Points: 126,399, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.7%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!200+ Posts Achievement!5 Threads Achievement!
    Awards:
    Community Award
    Join Date
    Sep 2012
    Location
    Rockledge, Florida
    Posts
    24,158
    Points
    126,399
    Level
    100
    Thanks
    4,441
    Thanked 8,824x 7,376 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Hi again JG. Although I primarily use my Celestron 6" f/5 refractor for wide angle DSO observing, it gives a good account of itself on the moon with medium high powers. The only chromatic aberration noted is the blue/violet at the limbs. Based on what you reported, the use of the prism may not only reduce this, but allow me to use even higher powers. Thanks for this analysis JG, and the best of regards.
    j.gardavsky, DeanD and bladekeeper like this.
    - Marshall

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Astroview 120ST f/5 Refractor on EQ3 mount
    Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
    Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    mount.
    Orion XT12i 12" f/4.9
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Intelliscope.
    Celestron SkyMaster 15x70 Binoculars. ZWO ASI120MC camera.
    >)))))*>

  12. The Following User Says Thank You to Makuser For This Useful Post:

    j.gardavsky (05-16-2019)

  13. #7
    j.gardavsky's Avatar
    j.gardavsky is offline Super Moderator
    Points: 110,802, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 94.0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,387
    Points
    110,802
    Level
    100
    Thanks
    14,386
    Thanked 8,774x 5,711 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Hello Marshall, hello all,

    different eyepieces will respond differently to the zenith prism on a fast achromatic refractor.
    And moreover, even the eyepieces with different focus lengths within one scaled design sequence may respond differently.

    So far tested: BCO 6mm, Pentax SMC O-6, O-18, and Fujiyama 5mm, on the terrestrial targets,
    and Tele Vue Delos 17.3mm, Leica B32x WW 14mm, Zeiss D 30x/40x B WW 12.8mm, on Moon on the 14th May - one day after the Moonwalk.

    In the first group the BCO 6mm seems to show the highest improvement,
    in the second group the winner has been unexpectedly the Zeiss D, followed by Leica B,
    and leaving the otherwise excellent Delos at some distance behind.

    Thank you for the kind comments,

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plssls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
    Astronomy Forum Rules and Terms of Service
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  14. #8
    j.gardavsky's Avatar
    j.gardavsky is offline Super Moderator
    Points: 110,802, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 94.0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,387
    Points
    110,802
    Level
    100
    Thanks
    14,386
    Thanked 8,774x 5,711 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Hello all,

    some more terrestrial tests have confirmed the conclusions as above, leaving the Zeiss closely followed by Leica spotting eyepieces as the champions, and followed by Delos, in the 17mm league.
    The best edge-to-edge performance has shown the Leica, Zeiss has revealed already some blur at the edge of FOV,
    and Delos has added some visible ring of fire at the edge of FOV, but not as bad as to ban the Delos into the old socks drawer.

    Still waiting on the better night skies,

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plssls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
    Astronomy Forum Rules and Terms of Service
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  15. The Following User Says Thank You to j.gardavsky For This Useful Post:

    John Baars (05-30-2019)

  16. #9
    DeanD's Avatar
    DeanD is offline HYPER GIANT
    Points: 16,324, Level: 88
    Level completed: 22%, Points required for next Level: 276
    Overall activity: 9.0%
    Achievements:
    365 Days+ Registered Achievement!2 Posts Achievement20 Posts Achievement!50 Posts Achievement!750 Days+ Registered Achievement!
    Join Date
    Apr 2012
    Location
    South Australia
    Posts
    2,364
    Points
    16,324
    Level
    88
    Thanks
    274
    Thanked 731x 595 Posts

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Hi JG. If you ever do get the urge to relegate the Delos to the "old socks drawer", let me know and I'll pay the postage for it to come to my drawer...

    - Dean
    j.gardavsky and Gabby76 like this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    12" home-made dob, Celestron 150 f5, Tak TSA102, TV 76, Celestron 800CPC, ETX 125
    Mounts:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    MiniTower, HEQ5Pro
    Binos: 25x100FB, Carton 11x80, Vanguard Endeavour 1045, Takahashi 22x60, Swarovski Habicht 8x30
    Eyepieces: My favourites are my Televue 32mm plossl, Nagler 13mm T6, Nagler 3-6mm

  17. #10
    John Baars's Avatar
    John Baars is online now Bronze Supporter
    Points: 17,558, Level: 91
    Level completed: 65%, Points required for next Level: 142
    Overall activity: 80.0%
    Achievements:
    20 Posts Achievement!2 Posts AchievementGallery Achievement!Album Achievement!5 Threads Achievement!
    Join Date
    Sep 2017
    Location
    Schiedam, Netherlands
    Posts
    1,368
    Points
    17,558
    Level
    91
    Thanks
    1,366
    Thanked 1,200x 704 Posts
    Blog Entries
    7

    Default Re: First light through the 2inch zenith prism on the 6inch F/5 Synta refractor

    Hello JG,

    Thanks for your excellent report!
    It seems that the spotting telescope eyepieces do a slightly better job than "regular" astronomical eyepieces?
    What is in your opinion the reason? Bigger market, more investments in development?

    I wonder how the Leica ASPH 18-9 fits in this review?
    j.gardavsky likes this.
    Telescopes in Schiedam : SW Evostar 120ED F/7.5, Vixen 102ED F/9, OMC140 maksutov F/14.3, SW 102MAK F/13 on Vixen GPDX.
    Binoculars: AusJena 10X50 Jenoptem, Swarovski Habicht 7X42, Celestron Skymaster 15X70, Swift Observation 20X80.
    Astronomical Rijswijk observatory telescopes: Astro-Physics Starfire 130 f/8 on NEQ6, C8 on NEQ6, Meade 14 inch SCT on EQ8, Lunt.
    Amateur since 1970.

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. 2 inch zenith prism on the 6 inch F/5 Sky-Watcher refractor, CA tests
    By j.gardavsky in forum Telescope Accessories Forum
    Replies: 12
    Last Post: 05-16-2019, 04:32 PM
  2. Need set screw for Synta-made Refractor.
    By Arctic in forum Astronomy Forum
    Replies: 4
    Last Post: 06-06-2018, 06:08 PM
  3. GSO Crayford for Refractor with 96mm Synta Flange
    By stargazer769 in forum Astronomy Classifieds
    Replies: 9
    Last Post: 04-11-2016, 07:35 PM
  4. 2inch diagonal on synta c90 mak?
    By space clown in forum Astronomy Beginners Forum
    Replies: 2
    Last Post: 09-02-2015, 05:48 PM
  5. Need to replace the focuser of my 6-inch synta refractor
    By tkuniok@calstatela.edu in forum Amateur Astronomy Forum
    Replies: 4
    Last Post: 09-12-2005, 07:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin Version 4.2.0
Powered by vBulletin
All times are GMT. The time now is 11:52 AM.