Cassini 120mm Spherical Primary Mirror

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ITEM# 20662157
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      Included Warranty: 1 year Limited Manufacturer
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    ITEM#: 20662157

    What more can we say about this shining, fabulous circular mirror, handcrafted for high reflectivity and tested for superior performance. There's really not much to say about a mirror, other than it reflects things well.


    • Made of plate glass, aluminized (92-percent) and SiO (quartz overcoat)
    • 120 mm-diameter circular mirror 
    • Diffraction limited L4 (1/4 wave in sodium light)  
    • Resolving Power (arc seconds): .97 and FL (focal length) 1,000 mm 
    • Preset collimation dot 
    • Handcrafted design 
    • Ronchi tested for high reflectivity
    • Dimensions: .5 in. H x 135 mm W x 135 mm L


      Material Glass
      Dimensions .5 in. H x 120 mm W x 120 mm L
      Warranty 1 year Limited Manufacturer
      Model Number PM-120
      Country of Origin China

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      Usually leaves our warehouse in 1-2 business days. *

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      Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
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      Standard Return Policy:

      Items must be returned in new or unused condition and contain all original materials included with the shipment. More Details

      FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

      For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

      ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.