Photographic arrangement of the Complete standard telescope kit: regular unbaffled dew shield, tri-Bahtinov mask, isolation mask and dust cap in Black.

Complete Telescope System with Dew Shield

Meade ETX-90 Mak / Black

$75.99

What's included4 components

Four-piece kitPhotographic component layout

Product photographs and CAD illustrations shown. Shape varies by telescope model.

Four-piece kit, image 1 of 6.

Complete Telescope System with Dew Shield

Complete telescope system

Complete Telescope System with Dew Shield

A four-piece telescope kit with a dew shield, tri-Bahtinov mask, isolation mask and dust cap. The masks and cap fit your telescope directly or the matching shield.

$75.99

Choose your telescope first to unlock color choices. Price varies by model.

Telescope Model

Color

See all four colors in the renders below ↓

U.S. standard shipping: $8 under $70; free at $70 or more. Delivery details.

Ask a question about your setup →

Model, fit, or choosing parts — we can help before you order.

Complete telescope system

4 pieces. One system.

Includes the dew shield, tri-Bahtinov mask, isolation mask and dust cap. Spike masks are sold separately.

01

Dew shield

Helps delay dew on exposed front optics and extends the telescope opening to accept matching masks and cap.

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

Dust cap

Covers the telescope or matching shield between sessions to help keep dust off the front optics.

Build your setup

Compare the standard system with Premium light-control options. Read the telescope accessory guide, compare dew shields, or browse matched accessory kits. Choose the same telescope model for every matching part.

Designed to work together

One system. With or without the shield.

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

Set up your way

Fit the shield when you need it. The focusing masks also fit directly on your telescope.

02

Check your setup

Use the tri-Bahtinov mask, then add the isolation mask to examine one pattern at a time. Follow your telescope's instructions for collimation adjustments.

03

Observe, then cover

Remove the focusing masks before observing or imaging. Fit the cap to the telescope or shield when you finish.

Black — CAD product/assembly illustration — Illustrative CAD views show one model example. Geometry varies by telescope. Rendered colors are approximate; choose your order color above.

Brick Red — CAD product/assembly illustration — Illustrative CAD views show one model example. 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.

Tri-Bahtinov and isolation masks fitted directly to a real Celestron SCT. Telescope is not included.

Dust cap fitted directly 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.

Apertura AD8 Dob
Celestron 130EQ / 130SLT
Celestron 4SE Mak
Celestron 6in Dob
Celestron 8in Newt
Celestron C5 SCT / 5SE SCT
Celestron C6 SCT / 6SE SCT / Evo 6 SCT
Celestron C8 SCT / 8SE SCT / Evo 8 SCT / CPC 800 / EdgeHD 8 / AVX 8 SCT / CGX 800
Celestron C9.25 SCT / EdgeHD 925 / CPC 925 / Evo 9.25
Meade ETX-105 Mak
Meade ETX-125 Mak
Meade ETX-90 Mak
Meade LX200 10in ACF
Meade LX200 8in SCT
Meade LX90 10in ACF
Meade LX90 8in SCT
Orion XT8 8in Dob
Sky-Watcher 127 Mak
Sky-Watcher 130P
Sky-Watcher 150 Mak
Sky-Watcher 150P / 150PDS
Sky-Watcher 200P Dob
Sky-Watcher 250P Dob
Sky-Watcher Flx 200P
StarSense 10in Dob
SW Quattro 150P
Zhumell Z8 Dob

Sky-Watcher Explorer 150P / 150PDS and Quattro 150P use different fittings. Pick the one you own. Need help finding your model?

Before your first night out

A few useful details.

Printed to order in carbon-fiber-reinforced PETG (CF-PETG), with a matte finish and fine print layer lines.

Ask us about your telescope

Do I have to use the shield every time?

No. The masks and cap fit your telescope directly as well as the matching shield. Use the isolation mask with the tri-Bahtinov in either setup.

How is this different from the Complete system with light control?

This includes the standard dew shield. The light control version adds internal rings, called baffles, with a shape informed by ray tracing to help redirect stray light away from the optics.

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 $70 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.