Product List

4-vane mounts

3-vane mounts

Curved mounts

Cassegrain mounts

ULS Quartz secondary mirrors

Pyrex secondary mirrors

Hi-tack flocked light trap

FlockBoard flocked light trap

Replacement parts


General ordering information

Download manuals

Foreign orders

Warranty & returns

Privacy policy

Contact us

Product Support

Contacting Protostar for technical support

If you have questions concerning the use or installation of any of our products, call 614-375-3146, or e-mail us. Phone support is available Monday through Friday, 9:00 AM to 5:00 PM (Eastern Time Zone).

Frequently asked questions (FAQs)

Here is a list of the most common questions we get about our products arranged by product type:

Straight-vane secondary mount FAQ
Curved secondary mount FAQ
Cassegrain secondary mounts
Secondary mirror FAQ
BlackLite telescope tube FAQ
Air-spaced tube liner FAQ
Flocked light trap material FAQ

General business FAQ

Product documentation

All of the manuals and tech sheets provided with our products are available for download.

Product dimensions & specifications

Helpful dimensions and other specifications for secondary mounts are provided to help plan your design, and estimate weights and balance points.

Repair and refurbishing service

We offer a repair and refurbishing service for our secondary mounts. Damaged components will be repaired or replaced, and the assembly is refinished with our graphite impregnated painting process. In most cases, we can make your mount look new again.

Common repairs are priced below. Call or e-mail us for a quote on services not listed here.

Shop services price schedule



Refinishing with graphite paint


Spider resizing; 3-vane, single lug per vane


Spider resizing; 3-vane, double lug per vane


Spider resizing; 4-vane, single lug per vane


Spider resizing; 4-vane, double lug per vane


Repair bent vanes & refinish


Notes: Prices do not include return shipping, or sales tax (Ohio residents). For spider resizing, they can only be made smaller, and the new size must be at least 0.4" smaller than original size.

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Protostar, P.O. Box 368 New Albany, Ohio 43054 U.S.A. 614-375-3146 (<< new phone & address as-of March 2018!)
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