TelescopesPlus - The #1 Online Store for Telescopes and Accessories

AstroZap Focusing Cap for 6" SCT - AZ-423

AstroZap Focusing Cap for 6" SCT - AZ-423 - Main image
$66 $110 In stock

Category: Telescope Accessories

AstroZap Focus Cap for 6" SCT's

When you want help focusing the image during CCD or DSLR photography sessions, just turn the center wheel to the "Open" position which reveals a trio of off-axis masks. This works like a Bahtinov mask. The Astrozap Focus Cap doesn't stop there. Rotate the wheel again to place the cap in the "Closed" position. From there, you can then either take dark frames or use it as any dust cap.



Proudly manufactured in the USA and made from lightweight aluminum and powder-coated black, this Astrozap Focusing Cap is an excellent example of great craftsmanship. As far as installation: three thumbscrews hold the Focusing Cap firmly in place, and no plastic plugs or tools are needed.



The Focus Cap will fit telescopes with outside diameters from 180mm-190mm. This measurement is normally that of a 6" SCT; Please measure your own telescope before ordering.

Completing your purchase

Take a moment to review your selection and total before payment.

Preparing your order

Please consider both preparation and transit when planning your purchase.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
Requesting a refund

Contact the store with your order details so your request can be reviewed.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery arrangements

The available delivery services and charges are listed below.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Before arranging a return

Speak with the store before arranging a return shipment.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Violet W. ★★★★★

The little turning wheel feels solid and clicks into place nicely. The off-axis masks made focusing my DSLR shots incredibly easy the first night out.

Andrew ★★★★★

Took this out on a clear night with my DSLR and the three off-axis masks made focusing a breeze—just clicked the center wheel to “Open” and the stars snapped into pinpoints. It’s a simple design but it works exactly as described, and I love that I don’t have to swap parts in the dark.

Grace Z. ★★★★★

I was struggling to get sharp focus with my DSLR until I tried this cap — turning the center wheel to reveal the off-axis masks was incredibly intuitive and made a noticeable difference. The three small apertures help me nail focus every time, even in less-than-ideal light.