| MODEL NO. | AY101-1 | AY101 | AY102,103 | AY104 | AY105,106 | AY107 |
| EFFECTIVE DIAMTER | 12.7mm | 25.4mm | 25.4mm | 25.4mm | 25.4mm | 25.4mm |
| ACCURCY | <±5″ | <±5″ | <±5″ | <±5″ | <±5″ | <±5″ |
| FRAME MATERIAL | ALUMINIUM ALLOY | ALUMINIUM ALLOY | ALUMINIUM ALLOY | ALUMINIUM ALLOY | PC | ALUMINIUM ALLOY |
| FOR | UNIVERSAL | LEICA | JAPAN BRAND | UNIVERSAL | UNIVERSAL | UNIVERSAL |
