Monthly Archives: December 2018
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The Agena AstroProducts Holiday Gift Guide
Author: Agena AstroProducts Published: January 2017
The holiday shopping season has arrived again, and it's time to start crossing items off your gift list. If you have an astronomer in your life, Agena AstroProducts makes it easy for you this year to choose a gift with this handy list of useful and interesting astronomy tools and accessories. There's something here for every stargazer, whether a beginner or old pro, visual observer or astrophotographer.
Many of these suggestions, the ones marked with an asterisk (*), are now on sale through the holiday season! And if you still can't find what you're looking for, we have hundreds of astronomy products on sale during our annual holiday event. See more at this link...
Here's our hand-selected list of useful and innovative astronomy products for this holiday season...
1. EYEPIECES
Long a favorite of visual observers with nearly any telescope, Agena's
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How to Attach a Finder to your Crayford Focuser
Author: Agena AstroProducts Published: April 2014
In recent months, a number of customers have asked us for a solution to mount finders on their Crayford focusers. We are pleased to offer you a simple, elegant, and inexpensive solution via a modified Universal Finder Dovetail Base. This can be used to mount your red dot, multi-reticle, or larger conventional finder on single - or dual-speed GSO/Antares/Hardin/Burgess Crayford focusers that use an M4 screw to mount the dovetail base (Note: This will not work with William Optics telescopes which use an M5 screw).
The image below shows our standard GSO/Synta style dovetail base for finder brackets on the left. However, you cannot use this base directly on your Crayford focuser as the base will be obstructed by the focuser's adapter plate. On the right is a modified version of this same dovetail base. We've drilled two holes (silver) and you can now use one hole to mount this
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Compatibility of GSO Crayford Focusers with Refractor Telescopes
Author: Agena AstroProducts Published: April 2018 Last Edited: February 2025
A. Important Information - Please Read
To help select a focuser for your telescope, you may find the table below useful.
This table is meant to be a general guide and not an authoritative reference. We cannot be responsible for any problems or fit issues. The only way to correctly determine which size focuser/adapter you need is by removing your existing focuser, measuring the inside diameter of your telescope tube carefully, and then making a choice before ordering a focuser (not after). Also make sure you can remove your stock focuser first. Some companies are known to have changed tube sizes and some OEM R&P focusers can be very hard to take off.
If your telescope is not mentioned in this list, then we do not know which focuser will work for you. In such cases, please contact us with your tube dimensions (exact inner and outer
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