Seven-piece Premium kitPhotos; 6-point mask shown in CAD
One complete system. Seven pieces.Ultimate Premium kit includes the Premium shield, Tri-Bahtinov, isolation mask, dust cap and 4-, 6- and 8-point spike masks. SCT/Mak example shown; the part shape and fit are matched to your selected telescope.
What Premium addsThe Premium shield in this kit adds internal baffles for stray-light control.
See the baffles insideDesign illustration based on the C8 shield. Dimensions, length and baffle spacing vary by telescope model.
The same parts fit both waysCelestron installation example. Matching masks and caps fit your telescope directly or the matching StargazeWorks shield. Check this listing for included parts.
What correct focus looks likeIllustration, not a captured star image. Adjust focus on a bright star until the central spike crosses the center of the X; remove focusing masks before normal imaging.
Why three sectors helpSeparate sector illustrations, not the full combined star pattern. The isolation mask covers two sectors so you can compare each reading in turn. It must match the Tri-Bahtinov mask.
Light control shieldPhoto
Tri-Bahtinov maskPhoto
Isolation maskPhoto
Dust capPhoto
4-point spike maskCAD illustration
6-point spike maskCAD illustration
8-point spike maskCAD illustration
Photos & design details1 / 15
Black component photographs and CAD illustrations shown. Shape varies by telescope model. Three separate spike masks are included: 4-point, 6-point and 8-point.
What makes it Premium?
Design illustration based on the C8 shield. Dimensions, length and baffle spacing vary by telescope model.
The Premium shield uses internal baffle rings to help interrupt off-axis wall reflections.
The kit adds focus and alignment masks, a dust cap and three spike masks. Use the matching masks and cap on the telescope directly or the shield.
Ultimate Premium Telescope System with Light Control & Spike Masks
Dew protection, stray-light control, focus and creative star spikes in one seven-piece system. The included masks and cap fit your telescope directly and the Premium shield.
In the box: Premium shield + tri-Bahtinov + isolation + three spike masks + dust cap.
From $112.99
Sale price $112.99Regular price
Choose your telescope for your exact price.
Choose your telescope first to unlock color choices. Price varies by model.
Black · product overviewChoose your telescope above, then your color.
U.S. standard shipping: $8 under $35; free at $35 or more. Delivery details.
Model, fit, or choosing parts — we can help before you order.
Stray light control with creative imaging
7 pieces. One system.
Includes the dew shield for stray light control, tri-Bahtinov mask, isolation mask, three spike masks (4-point, 6-point and 8-point) and dust cap: seven pieces total.
01
Dew shield for stray light control
Internal rings, called baffles, help redirect light arriving at an angle away from the optics. Their shape is informed by ray tracing. The shield also helps delay dew on exposed front optics.
02
Tri-Bahtinov mask
Creates three diffraction patterns to help you judge focus and optical alignment on a bright star.
03
Isolation mask
Used with the tri-Bahtinov mask to cover two sectors and examine one pattern at a time.
04
Diffraction spike masks
A set of three removable masks for 4-point, 6-point and 8-point star spikes in your images.
05
Dust cap
Covers the telescope or matching shield between sessions to help keep dust off the front optics.
The masks and dust cap fit both your telescope directly and the matching StargazeWorks dew shield. Choose pieces for the same telescope model and use the setup that suits your session.
01
Check focus and alignment
Use the tri-Bahtinov and isolation masks directly on the telescope or in the shield. Follow your telescope’s instructions for adjustments.
02
Choose your image
Remove the focusing masks. Add a spike mask and leave it fitted during the exposure when you want its star pattern; remove it for images without that added pattern.
03
Cover when finished
Use the dust cap on the telescope directly or on the matching shield between sessions.
Preview a color
Illustrative CAD views show one model example. The color view shows the 4-point spike mask; the full kit also includes the 6- and 8-point masks shown above. Geometry varies by telescope. Rendered colors are approximate; choose your order color above.
Real parts, in use
See the system on a telescope.
Original photographs show a Celestron SCT example. Check the captions for the parts shown.
Baffled shield fitted to a real Celestron SCT. Telescope is not included.One spike-mask example fitted to a real Celestron SCT. Telescope is not included.
Made for your model
Made for your telescope.
Select the full model name in the menu above, then choose your color. Similar apertures can have different fittings.
The rings inside a baffled dew shield intercept light coming in at an angle. Ray tracing helped us choose ring angles that direct reflections away from the optics and into the spaces between the rings.
Which masks stay on for an exposure?
Remove the tri-Bahtinov and isolation masks after checking your setup. A spike mask stays fitted during an exposure when you want 4-point, 6-point or 8-point spikes.
Does the system work without the shield?
Yes. The masks and cap fit the telescope directly and the matching StargazeWorks shield. The isolation mask pairs with the tri-Bahtinov in either setup.
Which telescope model should I choose?
Choose the full telescope model name, then your color. Similar apertures can have different fittings. Sky-Watcher Explorer 150P / 150PDS and Quattro 150P use different parts; select the one you own. Contact us if your model is unclear or not listed.
What if the fit is not right?
If a part does not fit the telescope model on your order, contact us within 30 days of delivery. Confirmed fit or manufacturing issues receive a replacement at no charge. The guarantee does not cover selecting the wrong telescope model.
When will it arrive?
Normally dispatches in 1–3 business days. U.S. standard shipping is $8, or free on orders of $35 or more, with an estimated 3–5 business days in transit after dispatch. Express shipping is $15, with an estimated 1–2 business days in transit. Delivery estimates are shown at checkout.
Can you help me choose or use the system?
Tell us your model, which StargazeWorks parts you already have, and what you want to do. We can help you choose the right pieces or check how your setup works together. Use the question form on this page or contact us before ordering.
Let’s get your setup right
Ask us anything.
Tell us your model, which StargazeWorks parts you already have, and what you want to do. We can help you choose the right pieces or check how your setup works together. Send your question here. We’ll reply by email.
