This is an M42 to M48 telescope mount adapter.
External thread M48*0.75, internal thread M42*0.75.
One of the essential accessories for astronomy enthusiasts.
Its outside diameter is 2 inches and its height is 4mm. Installing it will increase the backfocus length by 4mm.
Use it to mount M42 and M48 accessories together.
It is very easy to install and is an indispensable accessory for astronomers.
One side has M48x0.75 male thread and the other side has M42x0.75 female thread.
All-metal construction and anodized aluminum process, durable.High quality anodized aluminum adapter.
It can be used for a long time. Package Included: 1x M42 to M48 Telescope Mount