M42 x1 to M52 Step up Step down Ring Female Male Coupler Adapter Pack of 2 | eBay
HERCULES M56 M48/M52 female thread to M48 T2 thread, for takahashi FC60 photo adapter, etc S8131|Monocular/Binoculars| - AliExpress
Large SCT EdgeHD Adapter for Off-Axis Guider | Celestron
DEO-Tech OWL Canon EF Lens to Sony E-mount Drop-In Filter Adapter Filter Drawer
M42x1 female thread to 2" telescope eyepiece adapter
Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52
Baader Wide-T-Ring Canon R (for Canon R bajonet) with D52i to T-2 and S52 - T-Rings (Wide and Classic) - Camera Adapters - Adapters & Imaging Accessories - Accessories
S8115 M56 M42/M52 Female Thread to 42 T2 Thread Adapter For Takahashi FC60,FSQ85|thread|threading thread - AliExpress
Amazon.com : Prettyia 2 inch to T2 M420.75 Telescope Eyepiece Mount Adapter (T-Mount) + T Ring for Canon DSLR Camera Bodies 450D 500D 550D 600D 1100D : Electronics