Samyang 100mm f/2.8 ED UMC Macro 100mm
With a 1:1 maximum magnification and 307mm minimum focus distance, this 100mm f/2.8 macro lens uses one extra-low dispersion element and Ultra Multi-Coating to suppress aberrations and flare. Its manual focus design and rounded 9-blade diaphragm enable precise composition and smooth bokeh, while the internal focus keeps the 67mm filter thread non-rotating for easy polarizer use. This lens is best for Pentax K macro shooters who need true 1:1 reproduction on a budget and are comfortable working without autofocus.
Snapshot
Pros & Cons
Pros
- Strong optical (77th percentile) 77th
Cons
- Below average aperture (6th percentile)
- Below average bokeh (9th percentile)
- Below average af (15th percentile)
- Below average user sentiment (30th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews — so you can see whether early praise held up.
Based on 15 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | macro |
| Focal Length Min | 100 |
| Focal Length Max | 100 |
| Elements | 15 |
| Groups | 12 |
| Aspherical Elements | 1 |
| ED Elements | 1 |
| Coating | Ultra Multi-Coating |
Aperture
| Max Aperture | 32 |
| Min Aperture | 2.8 |
| Constant | Yes |
| Diaphragm Blades | 9 |
Build
| Mount | Canon EF |
| Format | full-frame |
| Weight | 0.7 kg / 1.6 lbs |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | manual focus only |
| Stabilization | No |
Focus
| Min Focus Distance | 307 |
| Max Magnification | 1:1 |
vs Competition
| Spec | Samyang 100mm f/2.8 ED UMC Macro 100mm | Sigma Contemporary 16-300mm f/3.5-6.7 DC OS | Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD | Nikon Nikkor 2166 | Panasonic LUMIX S S-R28200 | Canon EF-S 18-135mm f/3.5-5.6 IS USM |
|---|---|---|---|---|---|---|
| Focal Length | 100mm | 16-300mm | 18-300mm | 55-200mm | 28-200mm | 18-135mm |
| Max Aperture | 32 | f/3.5 | f/3.5 | f/4 | f/4 | f/3.5 |
| Mount | Canon EF | Sony E | Fuji X | Nikon F | L-Mount | Canon EF-S |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | false | true | false | false | true | false |
| Weight (g) | 710 | 615 | 92 | 255 | 413 | 515 |
| AF Type | manual focus only | HLA | VXD linear motor | Silent Wave Motor | Autofocus | STM |
| Lens Type | macro | zoom | zoom | telephoto | macro | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | Af | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Samyang 100mm f/2.8 ED UMC Macro 100mm | 14.6 | 8.6 | 33.3 | 63.5 | 77.1 | 5.5 | 30.3 | 34.1 | 37.7 | 35.9 |
| Sigma Contemporary 16-300mm f/3.5-6.7 DC OS Compare | 54.9 | 84.6 | 58.3 | 85.9 | 98.9 | 77.5 | 0 | 99.6 | 78 | 99 |
| Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD Compare | 98.2 | 75.5 | 96.4 | 87.8 | 74.3 | 77.5 | 30.3 | 99.2 | 83.1 | 81.1 |
| Nikon Nikkor 2166 Compare | 54.9 | 70.3 | 76.8 | 81.2 | 66.4 | 71.8 | 91.7 | 85.3 | 83.1 | 92.5 |
| Panasonic LUMIX S S-R28200 Compare | 54.9 | 78.4 | 73.9 | 70.8 | 91.2 | 71.8 | 0 | 95.6 | 62.6 | 99.4 |
| Canon EF-S 18-135mm f/3.5-5.6 IS USM Compare | 86.6 | 75.5 | 46.6 | 33.2 | 79.8 | 77.5 | 0 | 96 | 78 | 92.5 |
Price
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
