M42M-M48F 22.5mm Extender

Name: M42M-M48F 22.5mm Extender
Brand: ZWO
SKU: XSHOPS-SKU-4970986
Price: 15.25 USD
Availability: InStock
Rating: 4.2 (5 reviews)

$15.25 ~~$25~~ In stock

Category: Astrophotography Accessories

Product Description

The thickness of the M42M-M48F 22.5mm extender is 22.5mm. It is an important astronomical accessory for ASI2600MM Pro users who want to connect the camera to 7x36mm filter wheel to reach 55mm back focus distance while without the involvement of OAG-L.

Connection Guide:

When connecting the ASI2600 to 36mm EFW, you need to screw off the sensor tilt plate coming with the camera first, then use the screws to fix them. This can help you get the distance between the filter and the sensor much closer.

Mechanical Diagram:

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

If you need a refund

Keep your order number and contact the store to start.

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

View policy

Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (4.2 / 5 · 5 reviews)

Avery ★★★★★ Oct 21, 2026

The 22.5mm thickness is just right for getting the correct backfocus with my filter wheel setup. Threads were smooth and the connection to my camera feels solid.

Robert ★★★★★ Oct 20, 2026

Finally got my ASI2600MM Pro spaced correctly for the filter wheel, and this extender threaded on perfectly with no backfocus issues. The 22.5mm thickness was exactly what I needed to dial in the setup.

Timothy R. ★★★★☆ Oct 18, 2026

This 22.5mm spacer was exactly what I needed to get the spacing right between my filter wheel and camera, and the threads are smooth without any wobble. Only minor gripe is that it could use some blackening on the inside edges to cut down reflections, but it does the job perfectly for the price.