Cassini 80mm Spherical Primary Mirror

At other retailer: $32.63
Out of Stock
Free Shipping on All Orders
Never Pay Extra
5% Rewards Back
Earn on Every Purchase
Rewards for Writing Reviews
Up to $20 for Each Product
Free, No-Hassle Returns
On Select Clothing, Shoes & Jewelry
5% Dining Rewards
Get Paid to go out Tonight
$1.99 Stock Trades
Powered by Muriel Siebert & Co., Inc.
Add Club O Gold for $19.95/yr
Club O is FREE for Military, Teachers, Students, and First Responders
ITEM# 20662140
    Notify me when it is back in stock!

    Enter your email address, we will notify you if it comes back in stock.

Love this item?

Save it to a list so you can find it anytime!


something went wrong.

Please refresh the page and try again.


ITEM#: 20662140

This shiny, glossy circular mirror, handcrafted for high reflectivity and tested for superior performance, is the mirror to own. Go on with your vain self! There's really not much to say about a mirror, other than it reflects things well.


  • Made of plate glass, aluminized (92%) and SiO (quartz overcoat)
  • 80 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. L x 80 mm W x 80 mm L
Warranty 1 year Limited Manufacturer
Model Number PM-80
Country of Origin China

Questions & Answers

Yay! Be the first to ask a question about this product.

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
Shipping Information:

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.
Standard shipping details
Expedited shipping details

Standard Return Policy:

Items must be returned in new or unused condition and contain all original materials included with the shipment. For the return policy on a Marketplace item, please refer to the Seller’s individual policy, located on the product page by clicking on the Seller name. 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.