Daystar 0.60X Tilt Reducer

The Daystar 0.60X Tilt Reducer has two primary functions. First, it reduces your telescope's focal length by a factor of 0.6x, allowing you to fit the entire sun onto a smaller camera sensor. Second, its integrated tilt mechanism is used to eliminate interference fringes (Newton's Rings) for cleaner, higher-contrast solar images.

Yes, that is its primary design goal. Many telescope and camera combinations have too much focal length to view the entire sun at once. The 0.6x reduction widens the field of view specifically to enable full-disc solar imaging with smaller, high-frame-rate planetary cameras commonly used for this purpose.

The tilt function allows you to make a very slight physical adjustment to the angle of the reducer relative to the camera sensor. This adjustment changes the path of light just enough to cancel out the internal reflections between parallel optical surfaces that cause interference patterns. By fine-tuning the tilt, you can make these distracting fringes disappear from your image.

The reducer is designed for two common backfocus standards. It works natively with cameras that have a 17.5mm backfocus. It can also achieve a 12.5mm backfocus when used in combination with an appropriate 5mm spacer.

The 0.6x focal reduction makes the image significantly brighter. This allows you to use much shorter exposure times—approximately one-third as long as without the reducer. Faster exposures are better at "freezing" brief moments of steady air, allowing lucky imaging software to stack only the sharpest frames for a more detailed final result.

This reducer was designed and optimized specifically for the optical and mechanical requirements of the Daystar Combo Quark Hydrogen Alpha Filter. While it may thread onto other devices, its performance, spacing, and fringe-cancellation capabilities are only guaranteed when used as part of the intended Daystar system.