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  1. AstroSystems - 1.3 " Secondary Mirror

    AstroSystems - 1.3 " Secondary Mirror

    AstroSystems - 1 ... Learn More
    Model#: AS_SM_1.30
    $60.00

  2. AstroSystems - 1.30 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 1.30 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_1.30
    $29.00

  3. AstroSystems - 1.36 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 1.36 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_1.36
    $30.00

  4. AstroSystems - 1.52 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 1.52 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_1.52
    $31.00

  5. AstroSystems - 1.52 " Secondary Mirror

    AstroSystems - 1.52 " Secondary Mirror

    AstroSystems Secondary MirrorsPrecision Secondary Mirrors - the best!Our superior quality elliptical secondary mirrors are made of precision annealed Pyrex blanks, ground to the exact minor axis dimension ... Learn More
    Model#: AS_SM_1.52
    $80.00

  6. AstroSystems - 1.83 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 1.83 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_1.83
    $32.00

  7. AstroSystems - 1.83 " Secondary Mirror

    AstroSystems - 1.83 " Secondary Mirror

    AstroSystems Secondary MirrorsPrecision Secondary Mirrors - the best!Our superior quality elliptical secondary mirrors are made of precision annealed Pyrex blanks, ground to the exact minor axis dimension ... Learn More
    Model#: AS_SM_1.83
    $99.00

  8. AstroSystems - 18 " Altitude Bearings Double Layer 1/2 " Baltic Birch (0.95 " wide) Spoked

    AstroSystems - 18 " Altitude Bearings Double Layer 1/2 " Baltic Birch (0.95 " wide) Spoked

    AstroSystems Altitude Bearings:18 inches Long, Double Layer of 1/2" Baltic Birch Ply (0 ... Learn More
    Model#: AS_AB_18-0.5
    $80.00

  9. AstroSystems - 19.5 " Round Groundboard For 12.5 " telescopes - with 8.7 " bearing

    AstroSystems - 19.5 " Round Groundboard For 12.5 " telescopes - with 8.7 " bearing

    AstroSystems Round Ground Board Retrofiting your telescope with a GOTO drive?  Use our precision CNC cut round Ground Board for accuracy ... Learn More
    Model#: AS_RGB_19.5
    $99.00

  10. AstroSystems - 2.00 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 2.00 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_2.00
    $33.00

  11. AstroSystems - 2.14 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    AstroSystems - 2.14 " Secondary Holder - 1/4 " shaft with 3/8 " adapter

    These have a 1/4" mounting stud and a 1/4" to 3/8" bushing to fit both 1/4" and 3/8" spiders. The smaller diameter mounting stud reduces the weight by 50% ... Learn More
    Model#: AS_SH_2.14
    $35.00

  12. AstroSystems - 2.50 " Secondary Holder - 3/8 " shaft

    AstroSystems - 2.50 " Secondary Holder - 3/8 " shaft

    These have a 3/8" mounting stud and have our new long thumbscrews to clear the spider for easy, no tools collimation ... Learn More
    Model#: AS_SH_2.50
    $39.00

  13. AstroSystems - 2.60 " Secondary Holder - 3/8 " shaft

    AstroSystems - 2.60 " Secondary Holder - 3/8 " shaft

    These have a 3/8" mounting stud and have our new long thumbscrews to clear the spider for easy, no tools collimation ... Learn More
    Model#: AS_SH_2.60
    $39.00

  14. AstroSystems - 20 " Altitude Bearings Double Layer 1/2 " Baltic Birch (0.95 " wide) Spoked

    AstroSystems - 20 " Altitude Bearings Double Layer 1/2 " Baltic Birch (0.95 " wide) Spoked

    AstroSystems Altitude Bearings: 20 Inch Long, Double Layer 1/2" Baltic Birch Ply (0 ... Learn More
    Model#: AS_AB_20-0.5
    $90.00

  15. AstroSystems - 3.00 " Secondary Holder - 3/8 " shaft

    AstroSystems - 3.00 " Secondary Holder - 3/8 " shaft

    These have a 3/8" mounting stud and have our new long thumbscrews to clear the spider for easy, no tools collimation ... Learn More
    Model#: AS_SH_3.00
    $42.00

  16. AstroSystems - 3.10 " Secondary Holder - 3/8 " shaft

    AstroSystems - 3.10 " Secondary Holder - 3/8 " shaft

    These have a 3/8" mounting stud and have our new long thumbscrews to clear the spider for easy, no tools collimation ... Learn More
    Model#: AS_SH_3.10
    $43.00

  17. AstroSystems - 3.50 " Secondary Holder - 3/8 " shaft

    AstroSystems - 3.50 " Secondary Holder - 3/8 " shaft

    These have a 3/8" mounting stud and have our new long thumbscrews to clear the spider for easy, no tools collimation ... Learn More
    Model#: AS_SH_3.50
    $46.00

  18. AstroSystems - 4.00 " Secondary Holder - 3/8 " shaft

    AstroSystems - 4.00 " Secondary Holder - 3/8 " shaft

    The larger holders over 4" have a proportionately thicker shell for proper support of thicker, heavier secondaries and a 3/8" mounting stud. They utilize 1" long thumbscrews for easy, no tools collimation. Holders from 4.0" to 7 ... Learn More
    Model#: AS_SH_4.00
    $50.00

  19. AstroSystems - 4.25 " Secondary Holder - 3/8 " shaft

    AstroSystems - 4.25 " Secondary Holder - 3/8 " shaft

    The larger holders over 4" have a proportionately thicker shell for proper support of thicker, heavier secondaries and a 3/8" mounting stud. They utilize 1" long thumbscrews for easy, no tools collimation. Holders from 4.0" to 7 ... Learn More
    Model#: AS_SH_4.25
    $56.00

  20. AstroSystems - 4.5 " Secondary Holder - 3/8 " shaft

    AstroSystems - 4.5 " Secondary Holder - 3/8 " shaft

    The larger holders over 4" have a proportionately thicker shell for proper support of thicker, heavier secondaries and a 3/8" mounting stud. They utilize 1" long thumbscrews for easy, no tools collimation. Holders from 4.0" to 7 ... Learn More
    Model#: AS_SH_4.50
    $60.00

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