2. Review consensus
Under construction · Phase 4Review consensus
A consensus will appear only after at least three independent substantive reviews have been indexed.
C-4 Precision Optics 4.9mm F3.5 Hyper Fisheye
Full-frame·Prime·Manual focus·Historical
4.9 mmFocal length
f/3.5Max aperture
UnknownWeight
1. Physical size profile
Physical profile unavailable
Profile unavailable—verified length and maximum diameter are required.
4.9 mmFocal length
f/3.5Max aperture
UnknownWeight
- Mount
- Sony E
- Coverage
- Full-frame
- Lens type
- Prime
- Product status
- Historical
- Focal length
- 4.9 mm
- Maximum aperture
- f/3.5
- Focus
- Manual focus
- Stabilization
- Unknown
- Power zoom
- Unknown
- Minimum focus
- Unknown
- Maximum magnification
- Unknown
- Weight
- Unknown
- Length
- Unknown
- Maximum diameter
- Unknown
- Front filter thread
- Unknown
- Size-profile level
- Unavailable
Designed to cover full-frame Sony E-mount bodies and compatible with APS-C E-mount bodies.
Mounted profiles compare physical size only. Equivalent field of view and objective multi-lens comparison remain planned for Phase 3.
3. Sharpness profile
Under construction · Phase 4Sharpness evidence
No inferred sharpness scores are shown while the observation schema and normalization method are unfinished.
4. Bokeh profile
Under construction · Phase 4Bokeh evidence
The future profile will summarize sourced observations, not simulate this lens’s optical output.
5. Source reviews
Under construction · Phase 4Review index
Review links will be published only after source identity and coverage are verified.
6. Data provenance
- Verification
- Independent source verification
- Checked
- 2026-07-14
- Product status
- Historical
- Unknown handling
- Explicit
7. Similar verified lenses
Entaniya Fisheye HAL 200 5.0mm CustomizedAstrHori 6mm F2.8 Full-frame Circular FisheyeEntaniya Fisheye HAL 200 6.0mmCore specifications
- Mount
- Sony E
- Coverage
- Full-frame
- Lens type
- Prime
- Product status
- Historical
- Focal length
- 4.9 mm
- Maximum aperture
- f/3.5
- Focus
- Manual focus
- Stabilization
- Unknown
- Power zoom
- Unknown
- Minimum focus
- Unknown
- Maximum magnification
- Unknown
- Weight
- Unknown
- Length
- Unknown
- Maximum diameter
- Unknown
- Front filter thread
- Unknown
- Size-profile level
- Unavailable
Physical profile unavailable
Profile unavailable—verified length and maximum diameter are required.
Under construction · Phase 4Review-derived profiles
Sharpness and bokeh summaries require a verified observation system.
Under construction · Phase 4Review index
Consensus requires three independent substantive sources.
Data provenance
Independent source verification checked 2026-07-14. Recorded catalogue status: Historical.
Open Specification source ↗