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Panasonic Leica DG Summilux 25mm F1.4 II ASPH
vs
Panasonic Lumix G 20mm F1.7 ASPH

x
Lens to replace
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Panasonic 25mm F1.4 II ASPH

Wideangle Prime | Micro Four Thirds

Panasonic Leica DG Summilux 25mm F1.4 II ASPH
CHECK PRICE
BUY from B&H PHOTO
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Panasonic 20mm F1.7 ASPH

Wideangle Prime | Micro Four Thirds

Panasonic Lumix G 20mm F1.7 ASPH
CHECK PRICE
BUY from B&H PHOTO

Panasonic 25mm F1.4 II ASPH vs Panasonic 20mm F1.7 ASPH Comparison Overview

In this review, we will be comparing the Panasonic 25mm F1.4 II ASPH for the MFT and the Panasonic 20mm F1.7 ASPH for the MFT, two Wideangle Prime lenses by Panasonic.

We will start by looking briefly at the main specs of these two lenses, and in the following section, we will start analyzing them in more detail and listing the pros and cons of each lens.

Panasonic 25mm F1.4 II ASPH Key Specs

  • 25mm Focal Range
  • F1.4 Max Aperture
  • Weather-sealed
  • Filter Thread: 46mm
  • Max Format: FourThirds
  • Micro Four Thirds Mount
  • Weight: 205g.
  • Diameter: 63mm
  • Length: 55mm
  • Min Focus Distance: 0.3m
  • Max Magnification: 0.22x

Panasonic 20mm F1.7 ASPH Key Specs

  • 20mm Focal Range
  • F1.7 Max Aperture
  • Filter Thread: 46mm
  • Max Format: FourThirds
  • Micro Four Thirds Mount
  • Weight: 100g.
  • Diameter: 63mm
  • Length: 26mm
  • Min Focus Distance: 0.2m
  • Max Magnification: 0.13x
Panasonic 25mm F1.4 II ASPH Panasonic 25mm F1.4 ..
Panasonic 20mm F1.7 ASPH Panasonic 20mm F1.7 ..
Panasonic 25mm F1.4 ..
See at AMAZON
Panasonic 20mm F1.7 ..
See at AMAZON

What type of photography are the Panasonic 25mm F1.4 II ASPH and Panasonic 20mm F1.7 ASPH lenses good for?

The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 25mm F1.4 II ASPH and the Panasonic 20mm F1.7 ASPH for their suitability to various photography scenarios:

Photography Type Panasonic 25mm F1.4 II ASPH Panasonic 20mm F1.7 ASPH
Bird/WildlifeFairFair
SportsAverageAverage
PortraitExcellentExcellent
TravelGoodGood
StreetVery GoodVery Good
WeddingExcellentExcellent
Walk AroundGoodGood
VloggingGoodGood
LandscapeGoodGood
MacroFairPoor


Panasonic 20mm F1.7 ASPH was replaced by Panasonic Lumix G 20mm F1.7 II ASPH. You may also be interested in these comparisons:
Panasonic Lumix G 20mm F1.7 II ASPH vs
Panasonic Lumix G 20mm F1.7 II ASPH vs

Size and Weight Comparison

The size of a lens is an important deciding factor when comparing two lenses. Panasonic 25mm F1.4 II ASPH is the longer of the two lenses at 55mm. The Panasonic 20mm F1.7 ASPH with a length of 26mm, is 29mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 63mm.

The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Panasonic 20mm F1.7 ASPH weighs 100g, 51% (105g) lighter than the Panasonic 25mm F1.4 II ASPH's weight of 205g.


Below you can find the dimension and weight table of the Wideangle Prime Lenses in Micro Four Thirds Mount for size comparison purposes.

Wideangle Prime Lenses in Micro Four Thirds Mount for Size Comparison
Model Length Diameter Weight Street Price
Panasonic Lumix G 14mm F2.5 II ASPH Lens Panasonic 14mm F2.5 II ASPH
21mm
56mm 55g Amazon B&H Photo
Panasonic Leica DG Summilux 15mm F1.7 ASPH Lens Panasonic Leica 15mm F1.7
36mm
58mm 115g Amazon B&H Photo
Olympus M.Zuiko Digital 17mm f1.8 Lens Olympus M 17mm f1.8
36mm
58mm 120g Amazon B&H Photo
Sigma 16mm F1.4 DC DN Micro Four Thirds Lens Sigma 16mm F1.4 DC DN MFT
92mm
72mm 405g Amazon B&H Photo
Panasonic Lumix G 20mm F1.7 II ASPH Lens Panasonic 20mm F1.7 II ASPH
26mm
63mm 87g Amazon B&H Photo
Panasonic Lumix G Leica DG Summilux 12mm F1.4 ASPH Lens Panasonic DG 12mm F1.4
70mm
70mm 335g Amazon B&H Photo
Olympus M.Zuiko Digital 17mm f2.8 Pancake Lens Olympus M 17mm f2.8 Pancake
22mm
57mm 71g Amazon B&H Photo
Panasonic Leica DG Summilux 9mm F1.7 ASPH Lens Panasonic 9mm F1.7 ASPH
52mm
61mm 130g Amazon B&H Photo

Lens Mounts

Both the Panasonic 25mm F1.4 II ASPH and the Panasonic 20mm F1.7 ASPH has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are Panasonic G9 II, OM System OM-5 and Panasonic GH6.

Focal Range

Panasonic 25mm F1.4 II ASPH is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of 50mm when used on a FourThirds format camera. Panasonic 20mm F1.7 ASPH is a prime lens with fixed focal lenght of 20mm which has an effective (full-frame 35mm equivalent) focal range of 40mm when used on a FourThirds format camera.

Reasons to choose Panasonic Leica DG Summilux 25mm F1.4 II ASPH over Panasonic Lumix G 20mm F1.7 ASPH

Focal Length - Tele 25mm vs 20mm 5mm more Tele coverage
Max Aperture - Wide 1.4 vs 1.7 Wider aperture at wide end
Weather Sealing Yes vs No safer to use under rain and dust
Max Magnification 0.22x vs 0.13x higher magnification better for close-up shots

Reasons to choose Panasonic Lumix G 20mm F1.7 ASPH over Panasonic Leica DG Summilux 25mm F1.4 II ASPH

Focal Length - Wide 20mm vs 25mm 5mm Wider coverage
Weight 100g vs 205g 105g lighter
Length 26mm vs 55mm 29mm shorter
Minimum Focus Distance 0.2m vs 0.3m can focus closer to the subject
Common Weaknesses of Panasonic Leica DG Summilux 25mm F1.4 II ASPH and Panasonic Lumix G 20mm F1.7 ASPH
Image Stabilization No vs No Reliant on in-body Image Stabilization
Distance Scale No vs No No Distance Scale assist




**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate, I earn from qualifying purchases.

Panasonic 25mm F1.4 II ASPH vs Panasonic 20mm F1.7 ASPH Specs Table

Detailed comparison of specifications
General
Brand Panasonic Panasonic
Lens Type Prime Prime
Price CHECK PRICE CHECK PRICE
Lens Type Wideangle Prime Wideangle Prime
Lens Mount Micro Four Thirds Micro Four Thirds
Max Format FourThirds FourThirds
Focal Range 25mm 20mm
Image Stabilization No
Colour Black -
Zoom Method No Zoom No Zoom
Power Zoom No No
Zoom Lock No No
Zoom Ratio 1.0X 1.0X
Aperture
Max Aperture F1.4 F1.7
Min Aperture F16 F16.0
Aperture Ring No No
Diaphragm Blades 7 7
Optics
Optical Elements 9 7
Optical Groups 7 5
Focusing
Min Focus Distance 0.3m 0.2m
Max Magnification 0.22X 0.13X
Autofocus Yes Yes
AF Motor Type - Micromotor
Full Time Manual No Yes
Focus Method Internal Unit
Distance Scale No No
DoF Scale No No
Distance Scale No No
Focus Distance Limiter No No
Physical Specs
Weight 205g 100g
Diameter 63mm 63mm
Length 55mm 26mm
Weather Sealing Yes No
Filter Thread 46mm 46mm
Filter Notes - does not rotate on focus
Hood Supplied Yes No
Tripod Collar No No
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