2 Best f/4.0 Mirrorless Cameras, Compared

Quick picks

The best fit for you

• You need telephoto reach in a compact body OM System PEN Dual-Lens Mirrorless Camera It includes a 40-150mm lens for zooming in while keeping the kit compact.
• You want a lightweight silver camera for travel OM System OM-5 Mark II Silver 14-150mm Kit This silver model weighs 1.44 pounds and supports 4K video recording.
• You prioritize weather sealing for outdoor use OM System OM-5 Mark II Silver 14-150mm Kit Its durable build and weather sealing protect it during outdoor shooting sessions.

Our 2 picks

1 Best overall

OM System PEN Dual-Lens Mirrorless Camera

Best for: Travelers needing telephoto reach

Aperture

f/4.0 (what this guide is about)

Autofocus System

121-point all-cross phase-detection

Image Stabilization

Built-In Image Stabilization

Video Resolution

4K

Included Lens

14-42mm Lens

Color

Black

View on Amazon: OM System PEN Dual-Lens Mirrorless Camera Affiliate link

This compact mirrorless camera features a 393g body and dual-lens kit. It includes a 14-42mm zoom and a 40-150mm lens with an f/4.0 maximum aperture. The system uses a 121-point all-cross phase-detection autofocus for sharp images. It records 4K video and offers built-in image stabilization. You get intuitive dial controls and AI detection for people and pets. This setup suits travelers who want versatile reach in a small package.

Pros

• Includes 40-150mm f/4.0-5.6 telephoto lens for distant subjects
• 121-point all-cross phase-detection autofocus system
• Compact 393g body weight for easy carrying
• Built-in image stabilization for steadier handheld shots

Cons

• Primary kit lens has f/3.5-5.6 aperture, not f/4.0
• 40-150mm lens aperture varies to f/5.6 at full zoom
• No mention of weather sealing in specifications

Good fit if

• You want a lightweight camera for travel
• You need telephoto reach up to 150mm
• You prefer dial-based camera controls

Skip if

• You require a constant f/4.0 aperture on all lenses
• You need heavy-duty weather sealing
• You prefer a larger, heavier body for grip

Verdict: OM System Pen Black Mirrorless Kit offers a compact form with a versatile 40-150mm lens. It fits travelers who value portability and telephoto reach over constant wide apertures.

2 Best budget

OM System OM-5 Mark II Silver 14-150mm Kit

Best for: Travelers needing durable, lightweight 4K video

Aperture

f/4.0 (what this guide is about)

Video Resolution

4K

Color

Silver

Dimensions

11 × 7.9 × 5 inches

Weight

1.44 pounds

View on Amazon: OM System OM-5 Mark II Silver 14-150mm Kit Affiliate link

This silver OM System OM-5 Mark II is a compact mirrorless camera designed for mobility and durability. It features weather-sealed construction and weighs 1.44 pounds. The system supports 4K video recording and includes a computational photography button for creative control. With an f/4.0 aperture lens kit, it offers stable performance in various lighting conditions. It suits travelers who need a lightweight, rugged tool for capturing sharp images and video on the go.

Pros

• Silver color finish
• Weather-sealed body
• 1.44 pound weight
• 4K video recording
• Computational photography button

Cons

• Variable f/4.0-5.6 aperture
• No Bluetooth mentioned
• No app control mentioned

Good fit if

• You need a lightweight, weather-resistant camera for travel
• You prefer silver aesthetics
• You want 4K video capabilities in a compact body

Skip if

• You require a constant f/4.0 aperture throughout the zoom range
• You need native Bluetooth connectivity for immediate transfers
• You prefer a larger, heavier body for better grip

Verdict: The OM System OM-5 Mark II Silver is a solid choice for travelers seeking a durable, lightweight camera with 4K video support. Its weather sealing and computational features make it ideal for outdoor enthusiasts who value portability over constant wide aperture.

Specifications side by side

Is an f/4.0 aperture worth your money?

An f/4.0 aperture limits how much light enters the lens. This means you need more light or higher ISO settings in dim conditions. You get less background blur compared to wider apertures like f/1.8. However, lenses with this maximum aperture are often smaller and lighter. For travel, the compact size of the OM System kits outweighs the light-gathering limit. You trade low-light performance for portability and telephoto reach.

Worth it if

• You prioritize a compact and lightweight camera body for travel
• You shoot mostly in bright daylight conditions
• You need long telephoto reach without heavy glass

Skip it if

• You frequently shoot in low-light indoor environments
• You want strong background blur for portraits
• You need maximum light gathering for fast shutter speeds in dark settings

How we selected these cameras

We identified cameras by checking Amazon listings for the f/4.0 aperture specification. We included only products where the title or feature list explicitly stated this value. We selected one size or variant from each product family to keep the list concise. All details come directly from the published specifications and feature lists on those listings. We did not handle any products physically.

The 2 cameras are ordered by availability first. Next, we sorted by the listing's overall rating weighted by the number of ratings. Finally, we ranked products by how many of our guide's criteria their specs met. Prices and stock levels are shown live on the page and are refreshed daily. This text does not cover those dynamic values.

Key specs to check for f/4.0 cameras

1. Check included lens type

   You must verify which lens comes with the body. The OM System PEN Dual-Lens kit includes a 14-42mm lens, offering versatility for general travel. This setup suits buyers who want a standard zoom range. Other kits may feature longer focal lengths like 14-150mm. You need to decide if you prioritize wide-angle coverage or telephoto reach. The included lens dictates your initial shooting capabilities. Check the specific lens model listed in the product attributes to ensure it matches your needs.

2. Compare camera size and weight

   Portability is critical for travel photographers using these bodies. The OM System OM-5 Mark II weighs 1.44 pounds and measures 7.9 inches wide. These dimensions affect how comfortable the camera feels in your hand. You should compare the physical dimensions listed in the specs. A smaller body may be easier to carry all day. Larger bodies might offer better grip but less portability. Check the length, width, and height details. You need to ensure the size fits your travel gear constraints.

3. Verify video resolution support

   You should confirm the maximum video resolution each camera supports. Both models in this guide offer 4K video recording. This specification ensures you can capture high-definition footage. You need to check the attributes section for this detail. If you plan to shoot video, 4K is a standard baseline. Lower resolutions may not meet your output requirements. Ensure the camera explicitly states 4K support. This spec is crucial for content creators or travelers documenting trips.

4. Select your preferred color

   You can choose the camera color based on personal preference. The OM System OM-5 Mark II is available in silver. The PEN model comes in black. Color does not affect performance but influences aesthetics. You should check the color attribute in the product data. Some buyers prefer silver for visibility or style. Others prefer black for a professional look. This is a simple choice but part of the final decision. Ensure the listed color matches your desired appearance.

5. Confirm autofocus type

   You need to verify the autofocus system is available. The OM System PEN kit explicitly lists autofocus as a feature. This ensures the camera can track subjects automatically. You should check the attributes for focus type. Manual focus cameras require different skills and usage. Autofocus is standard for most modern mirrorless bodies. Confirm this spec to avoid purchasing a manual-only model. It impacts your ability to capture sharp images quickly.

Frequently asked questions

See also

• best mirrorless cameras under 200
• best mirrorless cameras under 1000
• best mirrorless cameras with f 4
• best security cameras with 4 Cameras