Pentax Pentax HD Pentax-D FA Macro 100mm f/2.8 ED AW Review
The Pentax 100mm f/2.8 Macro is sharp and built well, but its slow autofocus and lack of stabilization make it a tough sell for anyone but dedicated Pentax macro shooters.
Overview
This is a specialist's lens, and you need to know that going in. The Pentax HD D FA Macro 100mm f/2.8 is built for one thing: getting incredibly close to your subject with sharp, true-to-life detail. It's a full-frame macro lens that delivers a classic 1:1 magnification, and it feels like a precision tool in your hands. If you're shooting insects, product details, or flowers, this lens is in its element. But if you're looking for a general-purpose prime, you'll find its focus speed and lack of stabilization a bit frustrating for everyday use.
Performance
What surprised me was just how sharp it is at its job. The optics are solid, landing in the 66th percentile, and that shows when you're pixel-peeping macro shots. The colors are clean, and the contrast is great. The surprise on the downside is the autofocus. It's fine for deliberate macro work where you're manually fine-tuning anyway, but at 47th percentile, it's noticeably slower and noisier than modern lenses from other systems. Don't plan on using this for fast-moving subjects.
Pros & Cons
Pros
- Exceptional 1:1 macro capability is its reason for being. 82th
- Build quality is fantastic, feeling durable and well-made. 78th
- Light and compact for a full-frame macro lens at just 349g. 69th
- Image quality is very sharp for close-up work with good color.
Cons
- Autofocus is slow and hunts in lower light.
- No image stabilization makes handheld macro tricky.
- Not a versatile lens; it's mediocre for portraits and poor for travel.
- At $547, it's priced like a premium lens but lacks premium features like weather sealing.
Specifications
Full Specifications
Optics
| Focal Length Min | 100 |
| Focal Length Max | 100 |
| Elements | 10 |
| Groups | 8 |
Aperture
| Max Aperture | f/2.8 |
| Min Aperture | f/32 |
| Diaphragm Blades | 8 |
Build
| Mount | Pentax K |
| Format | Full-Frame |
| Weight | 0.3 kg / 0.8 lbs |
| Filter Thread | 49 |
AF & Stabilization
| AF Type | Autofocus |
| Stabilization | No |
Focus
| Min Focus Distance | 130 |
| Max Magnification | 1:1 |
Value & Pricing
The value is tough to justify unless you're a dedicated Pentax shooter who needs a macro lens. For $547, you get great macro performance but miss out on stabilization, fast AF, and weather sealing that competitors often include. It's a good lens, but it's not a great deal.
vs Competition
If you're locked into the Pentax K-mount, this is your main macro option, so the comparison is internal: are macro shots worth $547 to you? Looking outside the system, it's a different story. A lens like the Sony 90mm f/2.8 Macro G OSS offers sharper optics, blazing fast AF, image stabilization, and superior build for a similar price. Even third-party options for other mounts, like the Sigma 105mm f/2.8 DG DN Macro, offer better overall performance and features. This Pentax lens feels a generation behind.
| Spec | Pentax Pentax HD Pentax-D FA Macro 100mm f/2.8 ED AW | Meike Meike 50mm F1.8 Full Frame AF STM Lens Standard | Viltrox VILTROX 35mm F1.7 Lens, X Mount 35mm F1.7 Auto | Canon Canon - RF28-70mm F2.8 IS STM Standard Zoom Lens | Panasonic Panasonic LUMIX G Vario 14-140mm f/3.5-5.6 II | Fujifilm VILTROX 25mm F1.7 f/1.7 AF Lens for Fuji X Mount, |
|---|---|---|---|---|---|---|
| Focal Length | 100mm | 50mm | 35mm | 28-70mm | 14-140mm | 25mm |
| Max Aperture | f/2.8 | f/1.8 | f/1.7 | f/2.8 | f/3.5 | f/1.7 |
| Mount | Pentax K | Nikon Z | Fujifilm X | Canon RF | Micro Four Thirds | Fujifilm X |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | false | false | false | false | false | false |
| Weight (g) | 349 | 301 | 301 | 499 | 27 | 400 |
| AF Type | Autofocus | STM | STM | Autofocus | — | STM |
| Lens Type | — | — | — | Standard Zoom | Telephoto | — |
Verdict
I can only recommend this lens to a very specific person: a Pentax DSLR user who shoots a lot of macro and doesn't need fast autofocus. For everyone else, especially those considering a new system, look elsewhere. The competition offers more lens for the same money. It's a capable specialist tool, but it's hard to get excited about in 2024.