When comparing Sigma 18-50mm f/2,8 DC DN Contemporary Fuji XF and NiSi 15mm F4 Asph, which one is better?
The lens that weighs the least of the two is Sigma 18-50mm f/2,8 DC DN Contemporary - Fuji XF which weighs 290 g, compared to the loser NiSi 15mm F4 Asph which weighs 470 g.
Winner: Sigma 18-50mm f/2,8 DC DN Contemporary Fuji XF
Regarding weight: When it comes to the lens's weight, it's actually more important than many people think that the lens weighs as little as possible — it's simply a pain to lug around a lens that's too heavy when you're photographing or filming for several hours, and a few hundred grams can make a real difference.
When it comes to minimum focusing distance, that is how close to the subject the lens can focus, Sigma 18-50mm f/2,8 DC DN Contemporary - Fuji XF is the winner with a minimum focusing distance of 12 cm. This can be compared with the minimum focusing distance of 20 cm for NiSi 15mm F4 Asph.
Winner: Sigma 18-50mm f/2,8 DC DN Contemporary Fuji XF
Regarding minimum focusing distance: The lens's minimum focusing distance determines how close you can photograph your subject, such as a face or an animal. If the minimum focusing distance is 50 cm then you cannot get closer to your subject than 50 cm. Macro lenses often have a very low minimum focusing distance so that you can take close-up shots (macro photography).
Full specifications table of NiSi 15mm F4 Asph and Sigma 18-50mm f/2,8 DC DN Contemporary Fuji XF:
| NiSi 15mm F4 Asph | Sigma 18-50mm f/2,8 DC DN Contemporary - Fuji XF | |
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| Brand | NiSi Cinema | Sigma |
| Weight | 470 g | 290 g |
| Mount | Fujifilm X | Fujifilm X |
| Focal Length | 15 mm | 18 - 50 mm |
| Largest Aperture | 4 | 2.8 |
| Anamorphic Lens | No | No |
| Minimum Focusing Distance | 20 cm | 12 cm |
| Type | Prime | Zoom |
| Filter Thread | 72 | 55 |
| Lens Front Diameter (Not Filter Thread) | Missing | 7 mm |
| Stabilization | No | No |
| Covers a Full Frame Sensor? | Missing | No |