Filter Slider - 2" to 1.25" Filter Adapter (SFS-2125A)

Name: Filter Slider - 2" to 1.25" Filter Adapter (SFS-2125A)
Brand: Starizona
SKU: SFS-2125A
Price: 18.5 USD
Availability: InStock
Rating: 4.8 (5 reviews)

Filter Slider - 2" to 1.25" Filter Adapter (SFS-2125A) - Main image

$18.5 ~~$25~~ In stock

Category: Astrophotography Accessories

Description

This filter step ring is made specifically with the Starizona Filter Slider system in mind. It is zero profile, adding no extra height to the 1.25" filter. It steps the M48 threads of a standard 2" filter down to the 1.125" threads of a standard 1.25" filter. The step ring has a 2" outside diameter, so it can also be used in many other applications in addition to the Filter Slider.

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Express Shipping · United States: $3.99

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Customer Reviews (4.8 / 5 · 5 reviews)

William ★★★★★ Oct 21, 2026

I was worried about adding more bulk to my filter train, but this step ring truly is zero profile—it sits flush and adds no extra height. Works perfectly with my 2" to 1.25" setup, and the threads are smooth without any wobble. Finally got clean flats without having to re-space everything.

William ★★★★★ Oct 20, 2026

The threads engaged perfectly with my existing filter slider, no wobble at all. Finally a step ring that actually stays put when I swap filters in the field.

Hannah I. ★★★★★ Oct 19, 2026

I was worried about adding height to my filter train, but this adapter threads on perfectly flush with the M48 connection. It locks onto the Filter Slider securely without any wobble during long exposures.