Are Micro Four Thirds Lens Kits Still Smaller and Lighter Than Full Frame for Travel?

Introduction — Are Micro Four Thirds Lenses Really Smaller and Lighter?

Micro Four Thirds has long been known as the smaller, lighter alternative to full frame—especially for travel photography.

But is that still true today?

Modern Micro Four Thirds PRO lenses aren’t as small as many people expect, and at the same time, full-frame mirrorless cameras and lenses have become significantly more compact over the past few years.

So rather than relying on assumptions, I wanted to answer a practical question based on real-world use:

Is a Micro Four Thirds travel kit actually smaller and lighter than an equivalent full-frame setup?

My Micro Four Thirds Travel Lens Kit

For travel photography (excluding wildlife and bird photography), I typically carry:

• Olympus 8-25mm f/4 PRO
• Olympus 12-100mm f/4 PRO
• Olympus 40-150mm f/4 PRO

This setup gives me:

• Ultra-wide to telephoto coverage
• Constant f/4 aperture
• Weather-sealed, professional-level build

Micro Four Thirds vs Full Frame — What’s a Fair Comparison?

To properly compare Micro Four Thirds vs full frame for travel, you can’t just look at individual lenses.

What really matters is the total system weight, size, and coverage.

For this comparison, I matched my Micro Four Thirds kit against full-frame f/4 zoom trios from Sony, Canon, and Nikon.

These lenses represent the closest real-world equivalents in terms of:

• Focal length coverage
• Aperture
• Intended travel use

Micro Four Thirds vs Full Frame Weight Comparison

Here’s how the full travel kits compare:

• Micro Four Thirds (OM System) kit: 1,354g (3.0 lbs)
• Sony full frame kit: 2,021g (4.46 lbs)
• Canon full frame kit: 1,935g (4.27 lbs)
• Nikon full frame kit: 1,910g (4.21 lbs)

Micro Four Thirds saves approximately 550–700g (1.2–1.5 lbs) compared to equivalent full-frame kits.

Are Micro Four Thirds Lenses Actually Smaller?

This is where expectations and reality don’t always align.

Micro Four Thirds lenses—especially PRO lenses—are not always dramatically smaller than their full-frame counterparts.

For example:

• The Olympus 12-100mm f/4 PRO is a substantial lens
• The Olympus 8-25mm f/4 PRO is larger than many expect

If you compare lenses individually, the size difference is often smaller than expected—especially among modern full-frame mirrorless designs.

To better understand where those differences come from, here’s a breakdown of each system’s 3-lens travel kit, including lens weights and sizes.

Micro Four Thirds vs Full Frame Travel Kit Comparison (Lens Size and Weight)

Micro Four Thirds

Lens	FF Equivalent	Weight	Length
Olympus 8-25mm f/4 PRO	16-50mm	411g (14.5 oz)	89mm (3.50 in)
Olympus 12-100mm f/4 PRO	24-200mm	561g (19.8 oz)	117mm (4.61 in)
Olympus 40-150mm f/4 PRO	80-300mm	382g (13.5 oz)	99mm (3.90 in)
TOTAL		1,354g (47.8 oz / 3.0 lbs)

Sony Full Frame

Lens	Role	Weight	Length
Sony 16-35mm f/4	Wide	518g (18.3 oz)	99mm (3.90 in)
Sony 24-105mm f/4	Standard	663g (23.4 oz)	113mm (4.45 in)
Sony 70-200mm f/4	Telephoto	840g (29.6 oz)	175mm (6.89 in)
TOTAL		2,021g (71.3 oz / 4.46 lbs)

Canon Full Frame

Lens	Role	Weight	Length
Canon RF 14-35mm f/4 L	Wide	540g (19.0 oz)	99mm (3.90 in)
Canon RF 24-105mm f/4 L	Standard	700g (24.7 oz)	107mm (4.21 in)
Canon RF 70-200mm f/4 L	Telephoto	695g (24.5 oz)	120mm (4.72 in)
TOTAL		1,935g (68.3 oz / 4.27 lbs)

Nikon Full Frame

Lens	Role	Weight	Length
Nikon Z 14-30mm f/4 S	Wide	485g (17.1 oz)	85mm (3.35 in)
Nikon Z 24-120mm f/4 S	Standard	630g (22.2 oz)	118mm (4.65 in)
Nikon Z 70-180mm f/2.8	Telephoto	795g (28 oz)	151mm (5.94 in)
TOTAL		1,910g (67.4 oz / 4.21 lbs)

Note: Nikon does not currently offer a 70–200mm f/4 lens in its Z-mount lineup, so the 70–180mm f/2.8 serves as the closest travel-friendly alternative.

The weight difference adds up across all three lenses, but it becomes most noticeable at longer telephoto focal lengths, where full-frame lenses grow significantly larger and heavier.

Where Micro Four Thirds Has the Advantage

The real advantage of Micro Four Thirds isn’t just about individual lens size—it’s about system efficiency.

The best example is the Olympus 12-100mm f/4 PRO:

• Covers a wide focal range
• Reduces lens changes
• Replaces what would often require two lenses on full frame

This is where Micro Four Thirds becomes more practical for travel.

What About Camera Body Size? The Gap Is Getting Smaller

One of the biggest changes in recent years is camera body size.

As manufacturers have transitioned to mirrorless systems, full-frame cameras have become significantly smaller and lighter than their DSLR predecessors. Bodies from Sony, Canon, and Nikon are now much closer in size to Micro Four Thirds cameras than they used to be.

In some cases, the difference in body weight between Micro Four Thirds and full frame is no longer dramatic—especially when comparing weather-sealed, enthusiast-level bodies.

In other words, the traditional size advantage of Micro Four Thirds is no longer as clear when looking at camera bodies alone.

However, lenses still tell a different story.

As full-frame bodies get smaller, the real difference between systems comes down to lenses. In practical use, it’s the lenses—especially telephotos—that define how big and heavy your travel kit actually is.

Size vs Weight — Why Both Matter for Travel

Weight is only part of the equation.

Full-frame lenses are typically:

• Longer
• Bulkier
• Harder to pack efficiently

Even when the weight difference is moderate, the physical size of the lenses can make a noticeable difference in how easy your gear is to carry and pack.

Micro Four Thirds vs Full Frame for Travel Photography

When Micro Four Thirds Makes Sense

• You want a lighter overall travel kit
• You prefer fewer lenses with broader coverage
• You prioritize portability and convenience

When Full Frame Is Comparable

• You travel with a minimal kit (1–2 lenses)
• You prioritize depth of field control
• You don’t mind carrying larger lenses for specific needs

Conclusion — Smaller vs Lighter

So, are Micro Four Thirds lenses really smaller and lighter?

• Smaller? Not always—especially with PRO lenses
• Lighter? Yes—when comparing complete travel kits

The key takeaway:

Micro Four Thirds lenses aren’t always smaller—but Micro Four Thirds systems are usually lighter for travel.

For me, the advantage isn’t just about saving weight.

It’s about:

• Carrying less overall
• Changing lenses less often
• And having a system that fits how I actually travel and shoot

And in that context, Micro Four Thirds still offers a meaningful advantage for me.

Written by Martin Belan

Related Blog Posts
A Real World Field Test of the Laowa 7.5mm f/2 on Micro Four Thirds
OM System 8-25mm f/4 vs 7-14mm f/2.8: Which Ultra-Wide PRO Lens Is Right for You?
Which OM System / Olympus 40-150mm Lens Should You Buy?