The Honor 6A uses the built-in lens (fixed-lens camera) with a 8.23× crop factor (about 4.4 × 2.9 mm sensor). Below: equivalent focal lengths, maximum shutter speeds for sharp stars, a hyperfocal distance chart and how to check the shutter count.
Equivalent focal length & field of view
| Lens focal length | Full-frame equivalent | Diagonal FOV | Horizontal FOV |
|---|---|---|---|
| 8 mm | 66 mm | 36.5° | 30.8° |
| 10 mm | 82 mm | 29.5° | 24.8° |
| 12 mm | 99 mm | 24.8° | 20.8° |
| 14 mm | 115 mm | 21.3° | 17.9° |
| 16 mm | 132 mm | 18.7° | 15.7° |
| 18 mm | 148 mm | 16.7° | 13.9° |
| 20 mm | 165 mm | 15.0° | 12.6° |
| 24 mm | 198 mm | 12.5° | 10.5° |
| 28 mm | 231 mm | 10.8° | 9.0° |
| 35 mm | 288 mm | 8.6° | 7.2° |
| 50 mm | 412 mm | 6.0° | 5.0° |
| 85 mm | 700 mm | 3.6° | 3.0° |
Multiply by the 8.23× crop factor for the full-frame equivalent field of view.
Milky Way exposure: NPF and 500 rule
| Focal length | NPF @ f/1.8 | NPF @ f/2.8 | Strict NPF @ f/2.8 | 500 rule |
|---|---|---|---|---|
| 8 mm | 16.9 s | 21.2 s | 11.6 s | 7.6 s |
NPF = (35 × f-number + 30 × pixel pitch) ÷ focal length, with a pixel pitch of 2.4 µm (typical for this format — exact resolution not in our database). The strict version (Michaud's detailed NPF for the galactic core) gives pin-point stars at 100% view; the 500 rule is a loose rule of thumb that shows trailing on modern sensors.
How to check the Honor 6A shutter count
Not every maker writes a shutter count into image files. Try `exiftool -a -G1 -s image` on an unedited original and look for a tag containing "Shutter" or "Count".
ExifTool tag: (varies). Always test an original, unedited file straight from the card.
Where to buy
Compare new and used prices at these retailers:
B&H PhotoAmazonKEH (used)MPB (used)