SVBONY SV149 Nikon AF Lens to Eyepiece Adapter - 1.25"

The SVBONY SV149 adapter is designed to mount a Nikon AF-mount camera lens onto a telescope's 1.25-inch eyepiece focuser. This effectively turns your camera lens into the main objective, allowing you to use a 1.25" astronomy camera or eyepiece to capture extremely wide-field images of the night sky.

This adapter is specifically designed for lenses with the Nikon AF-Mount. It is compatible with most Nikon DSLR lenses. It is not compatible with Nikon Z-mount mirrorless lenses or older, non-AF manual focus lenses without the appropriate bayonet.

A 135mm lens is an excellent choice for framing large targets like the Heart and Soul Nebulae (IC 1805 and IC 1848). You would attach your 135mm Nikon AF lens to the SV149, insert the adapter into your telescope's 1.25" focuser, and then place your 1.25" astronomy camera into the focuser. This setup piggybacks on your main telescope mount for tracking, using the camera lens as a dedicated wide-field astrograph.

Yes, this is an excellent application. If you have a secondary focuser or mounting rings on your 10" Dobsonian (or any other large telescope), you can use the SV149 to mount a lighter telephoto lens (e.g., 200mm). By placing a 1.25" guide camera into the focuser, you create a high-quality, lightweight guidescope for your primary imaging system.

The M52*0.75 thread is a standard size for some astronomy accessories, like certain filter holders or field flatteners. It provides an additional, secure connection point on the adapter for building more complex imaging trains if needed, though its primary function is to attach to the lens.

The SV149 is made entirely of Aluminum Alloy, as confirmed in the specifications. It is CNC-machined for precision and black anodized for durability and stray light reduction. There are no plastic components that could flex or break under load.