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Yongnuo YN 40mm f/2.8N Lens for Nikon F

BH #YOYN402.8N • MFR #YN40MM F2.8/N
Yongnuo
Yongnuo YN 40mm f/2.8N Lens for Nikon F
Key Features
  • F-Mount Lens/FX Format
  • Aperture Range: f/2.8 to f/22
  • One Aspherical Element
  • Multi-Coated Elements
Distinguished by its pancake design and slightly-wider-than-normal focal length, the YN 40mm f/2.8N from Yongnuo is a compact prime for Nikon F-mount DSLRs. The comfortable field of view of the lens pairs well with the sleek profile to make it an ideal everyday lens to suit photographing in a variety of situations. Its optical design incorporates one aspherical element to reduce spherical aberrations and distortions for greater sharpness, and individual glass elements are also multi-coated to suppress flare for improved contrast. A DC motor affords quick and accurate autofocus performance and a switch lets you quickly change from AF and MF focusing methods. Additionally, a micro-USB port is located on the front of the lens to permit installing firmware updates for the lens.
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Yongnuo 40mm f/2.8 Overview

Distinguished by its pancake design and slightly-wider-than-normal focal length, the YN 40mm f/2.8N from Yongnuo is a compact prime for Nikon F-mount DSLRs. The comfortable field of view of the lens pairs well with the sleek profile to make it an ideal everyday lens to suit photographing in a variety of situations. Its optical design incorporates one aspherical element to reduce spherical aberrations and distortions for greater sharpness, and individual glass elements are also multi-coated to suppress flare for improved contrast. A DC motor affords quick and accurate autofocus performance and a switch lets you quickly change from AF and MF focusing methods. Additionally, a micro-USB port is located on the front of the lens to permit installing firmware updates for the lens.

Slightly wider than the standard 50mm, this 40mm f/2.8 lens is designed for FX-format Nikon F-mount DSLRs, however can also be used with DX models where it provides a 60mm equivalent focal length.
Pancake form factor is slim and lightweight to make for an especially portable lens to suit everyday shooting.
Relatively bright f/2.8 maximum aperture affords control over depth of field and also helps to realize the compact overall size.
One aspherical element is located at the rear of the lens construction, and helps to minimize spherical aberrations and distortion for greater sharpness and clarity.
Individual glass elements are multi-coated to resist flare and ghosting for improved contrast and color fidelity.
A DC motor is used for quick and accurate autofocus performance, and a dedicated switch lets you quickly change from AF to MF control. A focus distance scale is also featured to aid with pre-focusing techniques.
Chrome-plated metal lens mount is durable and accurate for a secure fit with the camera body and gold-plated contacts help to ensure consistent communication between the lens and camera.
Six-blade diaphragm contributes to a smooth bokeh quality.
A micro-USB port is located on the front of the lens to allow for updating the lens's firmware.

Yongnuo 40mm f/2.8 Specs

Focal Length40mm
Maximum Aperturef/2.8
Minimum Aperturef/22
Lens MountNikon F
Lens Format CoverageFull-Frame
Minimum Focus Distance11.81" / 30 cm
Maximum Magnification0.18x
Optical Design6 Elements in 4 Groups
Diaphragm Blades6
Focus TypeAutofocus
Image StabilizationNo
Filter Size58 mm (Front)
Dimensions (ø x L)2.91 x 1.77" / 74 x 45 mm
Weight4.59 oz / 130 g
Packaging Info
Package Weight0.605 lb
Box Dimensions (LxWxH)4.4 x 4.35 x 4.3"

Yongnuo 40mm f/2.8 Reviews

Sharp, cheap lens

By Eric
Rated 4 out of 5
Date: 2022-03-21

I'm enjoying this lens quite a bit. I bought it mostly for its size. The one issue I have with this lens is having to use +2 exposure compensation for all my shots with a D5100. Seems to be some communication issue between the lens and body that I don't experience with other lenses.

Works well enough for the pricepoint

By Michael
Rated 4 out of 5
Date: 2018-06-04

I was looking for a 40 mm pancake lens to use on my Nikon for street photography. This was the only option I could find for under $500. I have larger, more expensive, and better quality lenses, but wanted to get back to basics and travel light for Street photos. The lens fits the F- mount securely ( although, it's not weather sealed), and the Optics seem clear enough for non-professional use. It is true that the auto focus does need to hunt in even moderately dim light. I work around Lee hunting auto focus issue by using single point focus on a high contrast area near the subject, and recomposing the shot before releasing the shutter. It's also true that the body does have a somewhat cheap plasticky feel; but it's good enough for me. Honestly, how much abuse is a pancake lens really going to get anyway? Overall, it does what I need it to do and I'm glad that I bought it (so far).

Good for an inexpensive, compact lens

By Benjamin
Rated 4 out of 5
Date: 2018-02-14

I bought this lens specifically to live on my old D3100 for use as a "baby cam" because I wanted a small, quiet package to take pictures of my young daughter. The image quality is good on a 14MP sensor, and the autofocus keeps up with my older camera. It's not as good a performer as Nikon's 35mm f/1.8 DX lens, but it does cost half as much and is smaller.

Good AF Pancake Lens

By Ben Cushwa
Rated 4 out of 5
Date: 2018-02-01

I wanted the most compact possible AF lens for a small, "around the house" DSLR. I've never understood why Nikon doesn't make one, so I went with this Yongnuo model. It's exactly what I expected and needed: a compact, inexpensive prime. The autofocus can hunt a little bit in dim light, but this is a perfectly fine tradeoff for the size and price.

It is what it is

By Drew
Rated 3 out of 5
Date: 2020-02-25

This lens was very inexpensive and I was testing it to see if it could be a good walk around lens for me on my Nikon. The auto-focus does hunt a lot, and the lens itself is fairly loud and fairly slow. I have heard there are improvements with a firmware update and I haven't been able to test it yet on that front. All in all it will be fine for me and is also fine for what you pay for.

Great walk around lens.

By Stacey
Rated 4 out of 5
Date: 2019-05-03

Shooting mostly on D7100. Good color and almost zero distortion or aberration. Best in standard or neutral mode.  Super lightweight. Love it.

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