| Focus Ring | ||||
| Item No | Description | Outer diameter | extension range | Image |
| FIFO-ADV17.4-29.4 | V38 mount to V38 mount | 47.6mm | 17.4mm-29.4mm |  |
| FIFO-ADV20-27 | V38 mount to V38 mount | 44mm | 20mm-27mm |  |
| FIFO-ADVM58(20-27) | V38 mount to M58X0.75 | 60mm | 20mm-27mm |  |
| FIFO-ADVC(19.2-24.2) | V38 mount to C-mount | 44mm | 19.2mm-24.2mm |  |
| FIFO-ADVC(34.2-39.2) | V38 mount to C-mount | 44mm | 34.2mm-39.2mm |  |
| FIFO-ADVM58(18-29 ) | V38 mount to M58X0.75 | 60mm | 18mm-29mm |  |
| FIFO-ADV45M58(20-27) | 45mm V38 mount to M58X0.75 | 61mm | 20mm-27mm |  |
| FIFO-ADV38M42E3 | V38 mount | 48mm | 14.3mm-18.3mm | |
| FIFO-ADV6 | V38 mount to V38 mount | 44mm | 6mm |  |
| FIFO-ADV8 | V38 mount to V38 mount | 44mm | 8mm |  |
| FIFO-ADV10 | V38 mount to V38 mount | 44mm | 10mm |  |
| FIFO-ADV25 | V38 mount to V38 mount | 44mm | 25mm |  |
| FIFO-ADV50 | V38 mount to V38 mount | 44mm | 50mm |  |
| FIFO-ADV75 | V38 mount to V38 mount | 44mm | 75mm |  |
| FIFO-ADM72E5 | M72x0.75 to M72x0.75 | 75mm | 5mm |  |
| FIFO-ADM72E10 | M72x0.75 to M72x0.75 | 75mm | 10mm |  |
| FIFO-ADM72E25 | M72x0.75 to M72x0.75 | 75mm | 25mm |  |
| FIFO-ADM72E50 | M72x0.75 to M72x0.75 | 75mm | 50mm |  |
| FIFO-ADM90E50 | M90x1 to M90x1 | 94mm | 50mm |  |
| FIFO-ADM90E100 | M90x1 to M90x1 | 94mm | 100mm |  |
| FIFO-ADM95E50 | M95 to M95 | 99mm | 50mm |  |
| FIFO-ADM95E100 | M95 to M95 | 99mm | 100mm |  |