OM SYSTEM Olympus M.Zuiko Digital 40- vs Tamron 70-
Updated July 2026 — OM SYSTEM Olympus M.Zuiko Digital 40- wins on magnification, Tamron 70- wins on field of view and weight.
The OM SYSTEM Olympus lens is a budget-friendly option for Micro Four Thirds users, while the Tamron lens offers superior zoom capabilities and image quality for Sony users.
Why OM SYSTEM Olympus M.Zuiko Digital 40- is better
Price
OM SYSTEM lens is significantly cheaper.
Portability
Lighter and more compact design.
Target Audience
Ideal for budget-conscious Micro Four Thirds users.
Why Tamron 70- is better
Zoom Range
Tamron offers a longer focal length.
Image Quality
More advanced optical construction.
Autofocus
Quieter and faster focusing system.
Overall score
Specifications
| Spec | OM SYSTEM Olympus M.Zuiko Digital 40- | Tamron 70- |
|---|---|---|
| Focal Length | 40-150mm | 70-300mm |
| Aperture | F4-5.6 | F4.5-6.3 |
| Autofocus | High-Speed AF | RXD |
| Construction | Standard | 15 elements |
| Moisture Resistance | No | Yes |
Dimension comparison
Overview of the OM SYSTEM Olympus M.Zuiko Digital 40-150mm and Tamron 70-300mm
The OM SYSTEM Olympus M.Zuiko Digital 40-150mm is priced at $175.99, making it significantly more affordable than the Tamron 70-300mm, which costs $399.00. This price difference of about 56% may appeal to budget-conscious photographers looking for versatility in a zoom lens. The Olympus lens is designed for Micro Four Thirds cameras, while the Tamron lens targets Sony mirrorless full-frame and APS-C users, showcasing the distinct markets each product serves.
Design and Build Quality
In terms of design, the OM SYSTEM Olympus lens features a portable design that enhances its usability for on-the-go photography, while the Tamron lens emphasizes lightweight portability, making telephoto shooting enjoyable. The Olympus lens is specifically tailored for Micro Four Thirds system cameras and provides a maximum aperture of F/4-5.6, making it a good option for a variety of lighting conditions. In contrast, the Tamron lens boasts a moisture-resistant construction, which is advantageous for outdoor photographers who may encounter adverse weather conditions.
Zoom Capabilities
The zoom capabilities of these two lenses differ considerably, with the Olympus lens offering a 3.75x zoom range of 40-150mm, while the Tamron lens provides a broader 70-300mm range. This means that the Tamron lens can achieve a longer focal length, which is particularly useful for wildlife and sports photography. The Tamron’s focal length translates to an equivalent field-of-view of 105-450mm on APS-C cameras, further enhancing its versatility for various photographic scenarios.
Autofocus Performance
When it comes to autofocus, the OM SYSTEM Olympus lens is equipped with High-Speed Imager AF (MSC), which ensures quick and accurate focusing, essential for capturing fast-moving subjects. Meanwhile, the Tamron lens utilizes the RXD (Rapid eXtra-silent stepping Drive) unit, which not only delivers fast focusing but also operates quietly. This feature is particularly beneficial for photographers who need to capture candid moments without drawing attention to themselves, such as during weddings or wildlife shoots.
Image Quality and Performance
Both lenses deliver impressive image quality, but they achieve this through different constructions. The Tamron lens features 15 elements in 10 groups, designed to minimize chromatic aberration and enhance overall image clarity. This sophisticated design enables photographers to focus on creativity without compromising on quality. On the other hand, the Olympus lens, while not as complex in construction, still offers a maximum image magnification of .16x, making it suitable for various photographic needs, albeit with less reach compared to Tamron.
Portability and Weight
Portability is a crucial factor for many photographers, and both lenses cater to this requirement, though in different ways. The OM SYSTEM Olympus lens is designed for Micro Four Thirds cameras, making it lighter and more compact overall. The Tamron lens, while also designed to be light, weighs 19.2 oz and is 5.8 inches long, which is still manageable but not as lightweight as the Olympus. Thus, for those who prioritize a compact setup, the Olympus lens may be the more attractive option.
Target Audience
The target audience for each lens differs significantly based on their design and capabilities. The OM SYSTEM Olympus lens is ideal for Micro Four Thirds camera users who seek a budget-friendly option with decent zoom capabilities for everyday photography. Conversely, the Tamron lens caters to users of Sony mirrorless cameras, particularly those looking for a high-performance telephoto lens that can handle a variety of shooting conditions, including landscapes, sports, and portraits.
Which should you buy?
Choosing between the OM SYSTEM Olympus M.Zuiko Digital 40-150mm and the Tamron 70-300mm largely depends on your specific photography needs and budget. If you are looking for a more affordable lens that offers decent performance for everyday photography, the Olympus lens is a solid choice at $175.99. However, if you require a longer focal length and enhanced image quality for more specialized photography, the Tamron lens, despite its higher price of $399.00, may be worth the investment. Ultimately, both lenses serve their intended markets well, making them excellent options in their respective categories.

