This ZWO Nikon Lens Short Adapter for ZWO 1.25”/31mm/36mm Electronic Filter Wheels allows you to connect small format ZWO cameras with a ZWO 1.25"/31mm/36mm filter wheel to a Nikon F-mount lens. Please see the full compatibility list below to ensure this adapter is correct for your camera.

There are four Nikon lens to ZWO camera adapters:

• ZWO Filter Drawer for Nikon Lens # FD-Nikon - best for color cameras with use of a 2" filter
• ZWO Nikon Lens Adapter for ZWO 2" Electronic Filter Wheel # EFW2-Nikon - best for large format monochrome cameras that use a 2" filter wheel
• ZWO Nikon Lens Short Adapter for ZWO 1.25”/31mm/36mm Electronic Filter Wheel # EFW-NIKON-II - best for small format monochrome cameras that use a 1.25"/31mm/36mm filter wheel (this product)
• ZWO T2 Thread to Nikon Lens Adapter for all ASI Cameras # NIKON-T2-II - best for connecting most ZWO cameras without the need for quickly changing filters

Compatibility with Nikon Lenses:

This adapter is compatible with Nikon F mount (DSLR) lenses only. It is not compatible with Nikon mirrorless lenses. NOTICE: G-type Nikkor lenses need to find some way to open the aperture up (for example, by using an orthodontic rubber band to hold the little aperture tab on the lens in the “open” position.)

Compatibility with ZWO Cameras:

This ZWO adapter allows you to attach a Nikon F-mount lens to select ZWO cameras that have a backfocus of 6.5mm via ZWO's Electronic Filter Wheels (EFW). This includes all cooled (Pro model) cameras that have a 4/3" sensor or smaller. It has a female Nikon F-mount bayonet mount on the lens side and a male T/T2 thread on the other side which connects to the EFW. The EFW, in turn, connects to the ZWO camera.

Compatibility with ZWO Filter Wheels:

• ZWO 8-Position Electronic Filter Wheel for 1.25" or 31mm Filters # EFW8-125/31
• ZWO 5-Position Electronic Filter Wheel for 1.25" or 31mm Filters # EFWMINI
• ZWO 7-Position Electronic Filter Wheel for 36mm Unmounted Filters (Version II) # EFW7-36-II
• This product cannot be used with 2" EFWs and you will need EFW2-Nikon if using a 2" filter wheel.

How to Connect the Nikon Lens Short Adapter for ZWO 1.25"/31mm/36mm EFWs

Please Note: It is common for the silver plate on one side of this adapter to have several light scuff marks right out of the box. These items are new as received from ZWO, and these marks are purely cosmetic.