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Offering a broad field of view and a bright design, the PFU RBMH 20mm f/1.8 ASPH from Viltrox is an ultra-wide prime lens for Nikon Z-mount mirrorless cameras. The wide-angle design and fast f/1.8 maximum aperture make it well suited to astrophotography use, as well as landscape, interior, and architectural shooting. Its optical design incorporates a series of aspherical and low dispersion elements, which reduce spherical and chromatic aberrations for sharp, well-corrected imagery with accurate color rendering. An HD Nano multi-layer coating has also been applied to suppress flare and ghosting for improved contrast when working in strong lighting conditions. The lens has a manual focus design, which permits working with subjects as close as 9.8" away, and its 14-blade diaphragm contributes to a pleasing bokeh quality. Additionally, it is constructed from brass for durability and smooth operation.
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Key Features
- Z-Mount Lens/FX Format
- Aperture Range: f/1.8 to f/16
- One Aspherical and Four ED Elements
- HD Nano Multi-Layer Coating
Offering a broad field of view and a bright design, the PFU RBMH 20mm f/1.8 ASPH from Viltrox is an ultra-wide prime lens for Nikon Z-mount mirrorless cameras. The wide-angle design and fast f/1.8 maximum aperture make it well suited to astrophotography use, as well as landscape, interior, and architectural shooting. Its optical design incorporates a series of aspherical and low dispersion elements, which reduce spherical and chromatic aberrations for sharp, well-corrected imagery with accurate color rendering. An HD Nano multi-layer coating has also been applied to suppress flare and ghosting for improved contrast when working in strong lighting conditions. The lens has a manual focus design, which permits working with subjects as close as 9.8" away, and its 14-blade diaphragm contributes to a pleasing bokeh quality. Additionally, it is constructed from brass for durability and smooth operation.
Viltrox 20mm f/1.8 Overview
Ultra-wide prime is designed for FX-format Nikon Z-mount mirrorless cameras; however, it can also be used with DX models where it provides a 30mm equivalent focal length.
Bright f/1.8 maximum aperture suits working in difficult lighting conditions and also offers increased control over depth of field.
Four extra-low dispersion elements, one double-sided aspherical element, and one element made from highly transparent glass all contribute to reducing a variety of aberrations in order to produce a well-corrected image with accurate color and high sharpness.
HD Nano multi-layer coating has been applied to individual elements to reduce flare and ghosting for improved contrast. Also, this coating is water resistant to help protect the exposed surfaces from moisture.
Manual focus design, with a 148.5° focus throw, permits working with subjects as close as 9.8" away.
Engraved focus distance and depth of field scales benefit working with prefocus and hyperfocal focusing techniques.
A 14-blade diaphragm contributes to a pleasing bokeh quality.
Brass lens barrel construction realizes a physically durable design that also affords smooth operation.
Included lens hood helps to prevent flare and also affords some protection to the bulbous front element. Additionally, a filter adapter ring is included for mounting 82mm screw-in filters.
Viltrox 20mm f/1.8 Specs
Key Specs
| Focal Length | |
| Maximum Aperture | |
| Lens Mount | |
| Lens Format Coverage | |
| Focus Type | |
| Image Stabilization | |
| Filter Size |
| Maximum Aperture | |
| Minimum Aperture | |
| Lens Mount | |
| Lens Format Coverage | |
| Minimum Focus Distance | |
| Maximum Magnification | |
| Optical Design | |
| Diaphragm Blades | |
| Focus Type | |
| Image Stabilization | |
| Filter Size | |
| Dimensions (ø x L) | |
| Weight |
Packaging Info
| Package Weight | |
| Box Dimensions (LxWxH) |
Viltrox 20mm f/1.8 Reviews
not for astrophotography you will be disappointed not as sh
By Josue
Rated 2 out of 5
Date: 2021-12-05
I bought this lens and ended up returning it. In comparison to the 7artisans this lens is not as sharp, and it has a terrible vignette even at f2.8
great lens for Astrophotography
By Marlon
Rated 5 out of 5
Date: 2020-12-23
great lens. No aspherical problems.
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Nikon Z9 focus manual peaking working for this ...
Nikon Z9 focus manual peaking working for this Viltrox 20mm lens?
Peaking focusing is a setting in the Z9 and is not related to the lens. So, it will work with pretty much any lens including the Viltrox PFU RBMH 20mm f/1.8 ASPH Lens for Nikon Z.
Date published: 2022-03-14
What does PFU RBMH mean?
What does PFU RBMH mean?
Vitrox does not list the meaning of PFU RBMH. It seems it is just the name they call that new line of lenses.
Date published: 2021-10-24
Does it include the electronics to communicate ...
Does it include the electronics to communicate the EXIF data to the camera body?
It does not transmit any EXIF data to the camera unfortunately.
Date published: 2020-12-27
Does this lens have straight aperture blades or ...
Does this lens have straight aperture blades or rounded ones?
According to the manufacturer, the Viltrox PFU RBMH 20mm f/1.8 ASPH Lens for Sony E has 14 rounded diaphragm blades.
Date published: 2020-12-27
Is this lens weather sealed?
Is this lens weather sealed?
This lens is not weather sealed.
Date published: 2020-12-27
How does this compare to the Tamron 20mm?
How does this compare to the Tamron 20mm?
Hi, the Viltrox PFU RBMH 20mm f/1.8 ASPH Lens is 1.5 stops faster than the Tamron 20mm f/2.8 Di III OSD M 1:2 Lens and is a manual focus lens, while the Tamron lens is an autofocus lens. The Viltrox 20mm f/1.8 lens has 12 elements in 9 groups and 14 diaphragm blades vs 10 elements in 9 groups and 7 diaphragm blades for the Tamron lens.
Date published: 2021-03-05
Is there a hard stop at infinity?
Is there a hard stop at infinity?
The Viltrox PFU RBMH 20mm f/1.8 does hard stop at infinity
Date published: 2022-05-14