Top 20 Heaviest Lenses for Mirrorless Cameras in 2025: We have a new Leader!

Sigma 300-600mm F4 for Sony E and Leica L mounts tops the list of the heaviest lenses for mirrorless cameras!

Published: March 06, 2025
Updated: August 14, 2025

Canon RF 1200mm vs Canon RF 600mm F4 vs Sigma 300-600mm F4 vs Nikon Z 600mm F4 vs RF 800mm F5.6

(find this interactive visual size comparison here)

Heaviest Lenses for Mirrorless Cameras

When mirrorless cameras first arrived, they changed photography by being smaller and lighter than traditional DSLR cameras. But the biggest change wasn't just in the camera, it was in the lenses, too. In addition to the shorter flange distance of mirrorless cameras, thanks to more advanced materials and manufacturing technologies used in optical designs, lenses became smaller while also giving higher quality results. These new improvements allowed something super-handy: Fast Super-Telephoto lenses you can easily handhold, which was very hard to do with older DSLR camera and lens combinations.

Sigma 300-600mm f4 DG OS Sports becomes the heaviest lens for mirrorless cameras

In this article, we list the 20 heaviest lenses made for mirrorless cameras. At the top are the new Sigma 300-600mm f4 DG OS Sports lenses for E and L mounts standing at 3,985g / 8.77 lb (L-mount), which is still impressive due to its flexible zoom range while keeping a constant F4 aperture. Right behind them are Canon's RF 1200mm F8L IS USM and RF 800mm F5.6L IS lenses, special versions adapted from older DSLR models to work with today's mirrorless cameras.

Here is the Top 20 heaviest mirrorless lenses list:

HEAVIEST Lenses for Mirrorless Cameras in 2025

	Weight	Length	Diameter	Max Coverage
Sigma 300-600mm f4 DG OS Sports L-Mount (Amazon/B&H Photo)	3,985g / 8.77 lb	468mm	167 mm	35mm FF
Sigma 300-600mm f4 DG OS Sports E-Mount (Amazon/B&H Photo)	3,970g / 8.73 lb	470mm	167 mm	35mm FF
Canon RF 1200mm F8L IS USM (Amazon/B&H Photo)	3,340g / 7.35 lb	537mm	168 mm	35mm FF
Nikon Nikkor Z 600mm F4 TC VR S (Amazon/B&H Photo)	3,260g / 7.17 lb	437mm	165 mm	35mm FF
Canon RF 800mm F5.6L IS USM (Amazon/B&H Photo)	3,140g / 6.91 lb	432mm	163 mm	35mm FF
Canon RF 600mm F4L IS USM (Amazon/B&H Photo)	3,090g / 6.80 lb	472mm	168 mm	35mm FF
Sony FE 600mm F4 GM OSS (Amazon/B&H Photo)	3,040g / 6.69 lb	449mm	164 mm	35mm FF
Nikon Nikkor Z 400mm F2.8 TC VR S (Amazon/B&H Photo)	2,950g / 6.49 lb	380mm	156 mm	35mm FF
Sony FE 400mm F2.8 GM OSS (Amazon/B&H Photo)	2,895g / 6.37 lb	359mm	158 mm	35mm FF
Canon RF 400mm F2.8L IS USM (Amazon/B&H Photo)	2,890g / 6.36 lb	367mm	168 mm	35mm FF
Canon RF 100-300mm f2.8 L IS USM (Amazon/B&H Photo)	2,590g / 5.70 lb	323mm	128 mm	35mm FF
Sigma 60-600mm F4.5-6.3 DG DN OS E Mount (Amazon/B&H Photo)	2,495g / 5.49 lb	279mm	119 mm	35mm FF
Sigma 60-600mm F4.5-6.3 DG DN OS L Mount (Amazon/B&H Photo)	2,495g / 5.49 lb	279mm	119 mm	35mm FF
Sony FE 400-800mm F6.3-8.0 G OSS (Amazon/B&H Photo)	2,475g / 5.45 lb	346mm	120 mm	35mm FF
Nikon Nikkor Z 800mm F6.3 VR S (Amazon/B&H Photo)	2,385g / 5.25 lb	385mm	140 mm	35mm FF
Fujifilm XF 200mm F2 R LM OIS WR (Amazon/B&H Photo)	2,265g / 4.98 lb	206mm	122 mm	APS-C / DX
Nikon Nikkor Z 180-600mm F5.6-6.3 VR (Amazon/B&H Photo)	2,140g / 4.71 lb	316mm	110 mm	35mm FF
Sony FE 200-600 F5.6-6.3 G OSS (Amazon/B&H Photo)	2,115g / 4.65 lb	318mm	112 mm	35mm FF
Sigma 150-600mm F5-6.3 DG DN OS S L-Mount (Amazon/B&H Photo)	2,100g / 4.62 lb	266mm	109 mm	35mm FF
Sigma 150-600mm F5-6.3 DG DN OS S Sony FE Mount (Amazon/B&H Photo)	2,100g / 4.62 lb	266mm	109 mm	35mm FF

Here are some stats from the list that you may find interesting:

Zoom vs. Prime:
- 10 zoom lenses
- 10 prime lenses
Distribution by Brand:
- Sigma: 6 models
- Canon: 5 models
- Nikon: 4 models
- Sony: 4 models
- Fujifilm: 1 model
Lens Length:
- Shortest: Fujifilm XF 200mm F2 R LM OIS WR at 206 mm
- Longest: Canon RF 1200mm F8L IS USM at 537 mm
- Min & Max Length: 206 mm (min) and 537 mm (max)
Sensor Coverage:
- 19 lenses are designed for 35mm full-frame
- 1 lens (Fujifilm XF 200mm F2) is designed for APS‑C/DX sensors
Aperture Type:
- Fixed Aperture: 13 lenses (e.g., constant f4, f2.8, etc.)
- Variable Aperture: 7 lenses (e.g., f4.5‑6.3, f6.3‑8.0, etc.)
Lens Diameter:
- Minimum Diameter: 109 mm (Sigma 150‑600mm models)
- Maximum Diameter: 168 mm (seen on several Canon models)

Further Reading:

Sigma 300-600mm f4 Review

Sony FE 400-800mm F6.3-8 Review

Compare Sigma 300-600mm f4 vs Sony FE 400-800mm F6.3-8

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