Adapter, 3.5″ Hedrick Focuser to SecureFit Low Profile Spacer

$68.2 ~~$110~~ In stock

The Planewave Adapter, 3.5" Hedrick Focuser to SecureFit Low Profile Spacer is an astrophotography accessory that adds 1/2 inch of back focus. It is available in two classes, each sold separately.

Brand: Planewave
Category: Astrophotography Accessories
Adds 1/2 inch of back focus
Available in Class 1 (600327) and Class 2 (600328)
Each sold separately

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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

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Customer Reviews (4.8 / 5 · 5 reviews)

Stella ★★★★★ Oct 21, 2026

Exactly the 1/2 inch of extra back focus I needed to clear the filter wheel—the machining is precise and threads mate perfectly with my focuser. No flex or tilt detected even with a hefty camera setup attached.

Riley ★★★★★ Oct 20, 2026

Finally got the spacing dialed in with this adapter — that extra half inch of back focus made all the difference for my imaging train. The low profile design fits perfectly between my focuser and spacer without adding unnecessary bulk. My stars are finally sharp corner to corner now.

Owen ★★★★★ Oct 19, 2026

Installed this between my Hedrick focuser and camera to dial in the spacing — the 1/2 inch back focus was spot on. Machining is clean and threads engaged smoothly right out of the box.