### Finder Scope Base Extension Slot

#### 220MM Finder Scope Base Extension Slot
- **Name**: 220MM Finder Scope Base Extension Slot
- **Material**: Aluminum Alloy
- **Code**: XY-230822
- **Weight**: 167 grams
- **Surface**: Oxidized Layer
- **Usage**: Used for modifying astronomical telescopes to add finder scopes, smart boxes, and other finder telescope accessories.
- **Features**: Internal 60-degree finder slot standard, can install finder scopes, finder boxes, and other accessories, can be used as a handle.
- **Screw Holes**: 1/4 screw holes, M4 screw holes.

#### 360MM Finder Scope Base Extended Extension Slot
- **Name**: 360MM Finder Scope Base Extended Extension Slot
- **Material**: Aluminum Alloy
- **Code**: XY-230823
- **Weight**: 275 grams
- **Surface**: Oxidized Layer
- **Usage**: Used for modifying astronomical telescopes to add finder scopes, smart boxes, and other finder telescope accessories.
- **Features**: Internal 60-degree finder slot standard, can install finder scopes, finder boxes, and other accessories, can be used as a handle.
- **Screw Holes**: 1/4 screw holes, M4 screw holes.

### Guiding Pen Base, Dovetail Bar, and Dovetail Slot
- **Guiding Pen Base**: Used to mount guiding pens, aiding in precise tracking of celestial objects during astrophotography.
- **Dovetail Bar**: Used to connect the telescope to the mount, typically featuring a trapezoidal cross-section.
- **Dovetail Slot**: Matches the dovetail bar for quick and secure connections.

These accessories are essential for modifying and using astronomical telescopes, enhancing the precision and convenience of observation and photography. If you have further questions or need more detailed information, feel free to ask!