EFW-Nikon-Ⅱ Adapter

Name: EFW-Nikon-Ⅱ Adapter
Brand: ZWO
SKU: XSHOPS-SKU-4970734
Price: 38.94 USD
Availability: InStock
Rating: 4.6 (5 reviews)

$38.94 ~~$59~~ In stock

Category: Astrophotography Accessories

Product Description

The ZWO new EFW-Nikon-Ⅱ adapter with 20mm thickness design is independently developed by ZWO. It’s suitable for connecting Nikon lens and ZWO 1.25”/31mm/36mm filter wheel.

The thread of the interface is M42*0.75 so it cannot be connected to 2” EFW.

It can only match with ASI cooled cameras with 6.5mm back focus length.

ZWO New EFW-Nikon-Ⅱ Adapter

Connection method:

You can use this adapter with the following ASI cooled cameras:

ASI533/183/294/1600

ZWO New EFW-Nikon-Ⅱ Adapter-Connection Method

What’s in the box?

ZWO New EFW-Nikon-Ⅱ Adapter-Package List

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

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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 (4.6 / 5 · 5 reviews)

Riley ★★★★★ Oct 20, 2026

I was worried about the threads not matching, but the machining is precise and it tightened smoothly onto my filter wheel. The 20mm thickness keeps the setup rigid and works perfectly with the 1.25" filters I have.

Ella R. ★★★★★ Oct 19, 2026

The 20mm thickness is exactly what I needed to get proper back focus with my Nikon lens and filter wheel setup. Threads are smooth and precise—no wobble at all when mounting.

Alexander M. ★★★★★ Oct 18, 2026

Finally an adapter that actually lets me use my Nikon glass with my filter wheel — the 20mm thickness lines up perfectly with the 1.25" filters, no vignetting issues at all. Solid metal build too, no wobble when I rack focus.