The XF8.5 and XF12 are standard unifocal eyepieces, offering a focal length of 8.5mm and 12mm and a magnification of 46 and 32.5 times, respectively, with a 60-degree apparent field of view and a long 18mm eye relief. They also feature an extendible eyepiece ring with four click-stop positions.
The XF Zoom Eyepiece 6.5mm-19.5mm features a focal-length range of 6.5mm to 19.5mm for a magnification of 20 to 60 times, with an apparent field of view of 42 to 60 degrees and an eye relief of 11mm to 15mm. It also offers a user-friendly rubber eyepiece ring that never becomes too cold to touch while minimizing the risk of scratching the observer’s eyeglasses.
These eyepieces also come with a filter-mounting screw and an adapter-mounting screw.
Specifications
smc PENTAX XF-Series Eyepieces only |
| Product name | smc PENTAX XF12 | smc PENTAX XF8.5 | smc PENTAX XF ZOOM EYEPIECE 6.5mm-19.5mm |
| Lens Structure | 6 elements in 4 groups |
| Attachment Diameter | 31.7mm |
| Length & External Diameter | 78 x 43mm | 83 x 43mm | 88 x 50mm |
| Weight | 155g | 150g | 240g |
| Screw Diameter for Adapter | M30.5 P=0.5 | | M43 P=0.75 |
| Modle No. | 70532 | 70531 | 70530 |
| smc PENTAX XF12 with Spotting Scope | |
| Product name | PENTAX PF-100ED | PENTAX PF-80EDA | PENTAX PF-80ED | PENTAX PF-65EDA | PENTAX PF-65ED |
| Magnification | 52X | 43X | 42X | 32.5X | 32.5X |
| Real Field of View | 1.2° | 1.4° | 1.5° | 1.85° | 1.85° |
| Apparent Field of View | 60° | 60° | 60° | 60° | 60° |
| Field of View at 1000m | 21m | 24m | 26m | 32m | 32m |
| Exit Pupil | 1.9mm | 1.8mm | 1.9mm | 2.0mm | 2.0mm |
| Eye Relief | 18mm | 18mm | 18mm | 18mm | 18mm |
| Relative Brightness | 3.1 | 3.2 | 3.1 | 4 | 4 |
| smc PENTAX XF8.5 with Spotting Scope | |
| Product name | PENTAX PF-100ED | PENTAX PF-80EDA | PENTAX PF-80ED | PENTAX PF-65EDA | PENTAX PF-65ED |
| Magnification | 74X | 61X | 59X | 46X | 46X |
| Real Field of View | 0.8° | 0.95° | 1° | 1.3° | 1.3° |
| Apparent Field of View | 60° | 60° | 60° | 60° | 60° |
| Field of View at 1000m | 14m | 16.5m | 17m | 22m | 22m |
| Exit Pupil | 1.4mm | 1.3mm | 1.4mm | 1.4mm | 1.4mm |
| Eye Relief | 18mm | 18mm | 18mm | 18mm | 18mm |
| Relative Brightness | 1.9 | 1.6 | 1.9 | 1.9 | 1.9 |
| smc PENTAX XF Zoom Eyepiece 6.5mm-19.5mm with Spotting Scope | |
| Product name | PENTAX PF-100ED | PENTAX PF-80EDA | PENTAX PF-80ED | PENTAX PF-65EDA | PENTAX PF-65ED |
| Magnification | 32.5X-97.5X | 27X-81X | 26X-78X | 20X-60X | 20X-60X |
| Real Field of View | 1.3°-0.95° | 1.8°-0.95° | 1.6°-0.8° | 2.1°-1° | 2.1°-1° |
| Apparent Field of View | 42°-60° | 42°-60° | 42°-60° | 42°-60° | 42°-60° |
| Field of View at 1000m | 22.5m-11m | 31m-16.5m | 28m-14m | 37m-17m | 37m-17m |
| Exit Pupil | 3.0mm-1.0mm | 3.0mm-1.0mm | 3.0mm-1.0mm | 3.2mm-1.1mm | 3.2mm-1.1mm |
| Eye Relief | 11mm-15mm | 11mm-15mm | 11mm-15mm | 11mm-15mm | 11mm-15mm |
| Relative Brightness | 0.9-1.0 | 0.9-1.0 | 0.9-1.0 | 10.2-1.2 | 10.2-1.2 |
