What is the main purpose of the Baader Hyperion 2" Finetuning Stopring?
Its primary purpose is to make a set of 2-inch Baader Hyperion eyepieces parfocal. This means that once set, each eyepiece will reach focus at nearly the identical position, eliminating the need for major refocusing when you switch between them.
How does the brass clamp ring on this Baader stop ring protect my eyepieces?
The ring uses a brass compression mechanism. Brass is a softer metal than the anodized aluminum of an eyepiece barrel. When tightened, the brass ring clamps down securely without digging into or scratching the barrel's surface, preserving the finish and value of your eyepieces.
Can I use the Baader Hyperion 2" Finetuning Stopring with non-Hyperion eyepieces?
Yes, this stop ring will fit on any standard 2-inch eyepiece barrel. While it is designed to help parfocalize the Baader Hyperion series, it can be used with any 2-inch accessory where you need to set a consistent, repeatable insertion depth in a focuser or diagonal.
How do I set up the Baader Hyperion 2" Finetuning Stopring to make my eyepieces parfocal?
Start with the eyepiece in your set that requires the most "out-focus" travel. Focus on a star, then slide the ring down the barrel until it rests on top of your focuser or diagonal and lock it. Then, for each subsequent eyepiece, insert it, focus on the same star, and lock its ring in the same way. All eyepieces will now share a common focus point.
I'm observing Jupiter with my SCT and want to quickly switch between my 2" Hyperion eyepieces. How does this stop ring help?
When observing planets like Jupiter, seeing conditions can change in seconds. Having your eyepieces parfocalized with the Baader Hyperion 2" Finetuning Stopring allows you to switch from a low-power overview to high-power detail in an instant, without losing focus. This ensures you can capitalize on moments of steady air without wasting time finding focus again.
When imaging with a camera, I use a 2" Hyperion eyepiece to center the object. Will this ring help maintain focus?
Absolutely. This is a perfect use case. You can place a Baader Hyperion 2" Finetuning Stopring on both your centering eyepiece and your 2-inch camera nosepiece to make them parfocal. After centering the object with the eyepiece, you can swap it for your camera, and the object will be perfectly in focus, saving significant time and effort.
