Jump to content


Cassegrain Optics Sold!

Price - $65.00

Ad Number: 183426

Posted: 14 Sep 2019

Please sign in to message advertiser

This is a 6 inch Cassegrain primary and a 2 ¾ inch secondary. I have no idea about the quality or the optical figure on either component. The primary is about f/5. No idea about the secondary focal length or whether it is compatible with the primary. I have never been able to make an image with these. The hole in the primary is about 2 inches in diameter. The coatings on the primary are good but it has several sleeks and scrapes. Still usable I think. The secondary coating is failing and appears to have about 60% reflectivity. The secondary spider and mount appear to be very high quality, almost certainly made commercially. This piece by itself is probably worth a significant fraction of my asking price. US sale only. Paypal only and I handle the fee. Free CONUS shipping.


  • Condition Fair
  • Location CO

Advertiser Info

Powered by Classifieds

Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics