IRIX Blackstone 15mm f/2.4
The 15mm f/2.4 prime combines a 15-element optical design with Neutrino Coating to deliver low-distortion ultra-wide shots. Its manual focus with focus lock and weather-sealed build provide reliable tactile control in harsh conditions. This lens suits macro shooters who exploit the 250mm close focus to capture wide perspectives with sharp detail.
Resumen
Opinión de los propietarios
Cómo cambió la opinión de los propietarios con el tiempo
ExclusivaSegún cuándo escribieron realmente sus opiniones los clientes, para ver si los elogios iniciales se mantuvieron.
- Q2 201963/100
Buyers praised value and astrophotography performance, but one reported severe decentering and quality control concerns.
- Excellent value for landscape and astrophotography, with minimal distortion.
- Severe decentering defect causing softness on one side of the frame.
- Manual focus ring stiffness noted; infinity mark accuracy varies.
- Firefly version recommended over Blackstone for cost savings.
- Q1 201993/100
Buyers praised the lens for sharpness, build quality, and minimal distortion, though one noted a coma issue for astrophotography.
- Sharpness and image quality are excellent.
- Build quality and attention to detail are praised.
- Minimal distortion and easy correction in Lightroom.
- Coma issue for astrophotography; stars appear as comas.
- Q4 201873/100
Buyers praised the lens for sharpness, build quality, and value, but noted focus calibration issues and slow customer service.
- Excellent image quality and sharpness, comparable to L glass.
- Focus scale and confirmation chip can be off, requiring patience.
- Solid build quality with thoughtful features for astrophotography.
- Customer service slow to respond to focus-related complaints.
- Q2 2018100/100
Buyers praised the lens for sharpness, build quality, and astrophotography performance. Minor issues with lens shade fit were resolved by responsive support.
- Excellent image sharpness and color, especially from f/4 onward.
- Great for astrophotography, with accurate infinity focus out of the box.
- Solid build quality, described as 'built like a tank'.
- Lens shade attachment issue reported but quickly resolved by support.
- Q1 201890/100
Buyers praised the lens for sharpness, build quality, and value, especially for landscape and astrophotography. Some noted minor quality control and underexposure issues.
- Sharp image quality and excellent performance for the price.
- Good build quality, smooth focus, and sturdy construction.
- Quality control issues: some lenses sharper on one side than the other.
- Photos tend to be slightly underexposed, requiring exposure compensation.
- Q4 201778/100
Buyers praised sharpness, build quality, and value for astro/landscape, but some reported poor quality control and infinity focus calibration issues.
- Sharp image quality with minimal distortion, excellent for astro and landscape.
- Infinity focus calibration issues out of box; some lenses missing lock screws.
- Solid Blackstone build with weather sealing and included hard case.
- Gel filter system innovative but tricky to use in field.
- Q3 201783/100
Buyers praise sharpness, build quality, and value for astrophotography and landscapes, but note manual focus is impractical for general use.
- Sharpness and image quality are excellent, even wide open.
- Build quality is solid and lens is lightweight for its class.
- Manual focus-only design is impractical given autofocus alternatives.
- Packaging damage reported; lens performance unaffected.
- Q2 2017100/100
Buyers praised excellent image quality, rectilinear distortion, and thoughtful ergonomic design for landscapes and astrophotography. Some noted manual focus challenges in dim light.
- Excellent image quality and sharpness for landscapes and astrophotography.
- Well-thought-out ergonomic features like filter accommodation and focus lock.
- Minimal distortion and great value compared to pricier alternatives.
- Manual focus can be difficult in low light, but overall manageable.
Basado en 69 opiniones de clientes con fecha, agrupadas por trimestre natural. El análisis por periodo está en inglés.
Las pruebas
Rendimiento
Especificaciones
Especificaciones completas
Optics
| Type | Prime |
| Focal Length Min | 15 |
| Focal Length Max | 15 |
| Elements | 15 |
| Groups | 11 |
| Aspherical Elements | 2 |
| ED Elements | 2 |
| Coating | Neutrino coating |
Aperture
| Max Aperture | f/22 |
| Min Aperture | f/2.4 |
| Constant | No |
| Diaphragm Blades | 9 |
Build
| Mount | Pentax K |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.7 kg / 1.5 lbs |
| Filter Thread | 95 |
AF & Stabilization
| AF Type | manual focus only |
| Stabilization | No |
Focus
| Min Focus Distance | 280 |
| Max Magnification | 1:2 |
Frente a la competencia
| Spec | IRIX Blackstone 15mm f/2.4 | Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR | Tamron Di III 28-75mm f/2.8 VXD G2 | Sigma Contemporary 10-18mm f/2.8 DC DN | Panasonic Leica DG Vario-Elmarit H-ES12060 | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 15mm | 18-140mm | 28-75mm | 10-18mm | 12-60mm | 28-70mm |
| Max Aperture | f/22 | f/3.5 | f/2.8 | f/2.8 | f/2.8 | f/22 |
| Mount | Pentax K | Nikon Z | Sony E | Sony E | Micro Four Thirds | Canon RF |
| Stabilization | false | true | false | false | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 685 | 315 | 540 | 260 | 320 | 495 |
| AF Type | manual focus only | stepping motor | VXD | Autofocus | linear motor | STM |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Producto | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Valoración social | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| IRIX Blackstone 15mm f/2.4 | 13.9 | 25.9 | 56.9 | 74.4 | 84.1 | 22.6 | 37.3 | 33.6 | 65.4 | 37.9 |
| Nikon NIKKOR Z DX 18-140mm f/3.5-6.3 VR Compare | 86.9 | 77.7 | 83.8 | 82.6 | 88.5 | 79.7 | 0 | 96.2 | 32.2 | 96.6 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88 | 67.2 | 87.3 | 87.8 | 85.6 | 80.4 | 78.2 | 83.3 | 37.9 |
| Sigma Contemporary 10-18mm f/2.8 DC DN Compare | 54.6 | 83.4 | 87.1 | 93.3 | 81.5 | 85.6 | 80.4 | 69 | 69.2 | 37.9 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98 | 88 | 83 | 50.2 | 90.2 | 85.6 | 44.2 | 93.1 | 63.9 | 83.2 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 86.9 | 25.9 | 70.2 | 80.3 | 85 | 22.6 | 98.1 | 77.1 | 88 | 98.5 |