Pentax smc DA* 50-135mm f/2.8 ED AL [IF] SDM
Professional weather-sealed fast telephoto zoom lens
![Pentax smc DA* 50-135mm f/2.8 ED AL [IF] SDM](https://www.lightandcomposition.com/wp-content/uploads/2026/04/Pentax-smc-DA-50-135mm-f2.8-ED-AL-IF-SDM-gear-image-generated.png)
Key Features
Lens Capabilities
Click the Links Below for Details
The Most Important Rings & Switches — Pentax smc DA* 50-135mm f/2.8 ED AL [IF] SDM
| Ring / Switch / Control | Status | Note |
|---|---|---|
| Focus Ring | ✓ Present | |
| Zoom Ring | ✓ Present | |
| Aperture Ring | ✗ Not Present | |
| AF/MF Switch | ✓ Present | |
| Image Stabilisation Switch | ✗ Not Present | |
| Focus Limiter Switch | ✗ Not Present | |
| Function (L-Fn) Button | ✗ Not Present | |
| Zoom Lock Switch | ✗ Not Present | |
| Optical Image Stabilisation (OIS) | ✗ Not Present | |
| Weather Sealing | ✓ Present | AW construction |
How-to Use Pentax smc DA* 50-135mm f/2.8 ED AL [IF] SDM
Welcome to the How-to section of the lens. In this Light & Composition University website, each page for a lens has a how-to section and a section for learning. The rings, switches and controls of each lens are placed differently between brands and models. The how-to section helps you operate the lens; however, if you are interested in learning photography, you also need to know what each control changes and why you would change it. Click the “Learn” or scroll down.
Learn & Master Photography with Pentax smc DA* 50-135mm f/2.8 ED AL [IF] SDM
For over a decade, we have been teaching photography following a university standard. No one does it better than us. We have a selection of courses, diplomas, graduate and post-graduate programs, as well as some of our best-selling university press publications, to guide you in the best possible way for your lens. Enroll in the fundamentals and then move to the genres you want to master.
Technical Specification
| Lens Type | Telephoto Zoom |
| Focal Length | 50-135mm (76.5-207mm equivalent) |
| Aperture | f/2.8 - f/22 |
| Lens Construction | 18 elements in 14 groups |
| Angle of View | 31.5u00b0 - 11.9u00b0 |
| Diaphragm Blades | 9 (rounded) |
| Min Focus Distance | 1.0m |
| Max Magnification | 0.17x |
| Filter Thread | 67mm |
| Focus Motor | SDM (Supersonic Direct-drive Motor) |
| Weather Sealing | Yes (AW) |
| Weight | 685g |
| Dimensions | 84mm x 136mm |
