The YN85mm S DF DSM Lens from Yongnuo is a medium telephoto prime for full-frame Sony E-mount mirrorless cameras. The fast f/1.8 aperture suits working in low-light conditions and enables increased control over depth of field for isolating subject matter.

85mm Medium Telephoto Prime Lens    Full-Frame Sensor Coverage    Low-Dispersion Lens Element    High Refractive Index Element    Nano-Multilayer Coating    Ultra-Quiet DSM Stepping Motor    Customizable Function Control Button    AF/MF Selector Switch    USB Type-C Firmware Update Port    7-Blade Circular Diaphragm

The YN85mm S DF DSM Lens from Yongnuo is a medium telephoto prime for full-frame Sony E-mount mirrorless cameras. The fast f/1.8 aperture suits working in low-light conditions and enables increased control over depth of field for isolating subject matter.

This lens is an upgrade from an earlier YN85mm S DF DSM lens. This newer one features aluminum construction, improved lens coating, and a rubber ring around the metal bayonet that prevents water and dust from entering the lens through the rear. The only other difference is a slight redesign in the appearance of the lens. It's all black, without a red stripe around the top.

An AF/MF selector switch allows you to quickly toggle between autofocus and manual focus modes. Next to this selector switch is a customizable function button that can be assigned a shortcut operation or used to pull up a function menu.

The fast f/1.8 aperture allows increased control over depth of field, enabling you to isolate a subject from the background. It allows you to shoot with higher shutter speeds in low-light environments and to achieve a soft blur effect.

Additionally, a 7-blade diaphragm lets you capture smooth bokeh and circular highlights. With the aperture appropriately reduced, the 7-blade diaphragm also allows you to capture photos with star effects.

Related Questions and Answers

Q: 1. Is this a full frame or an APS-C lens? I thought the Yongnuo 35mm F2S DF DSM was full frame.

A: This lens is optimized for full frame Sony E cameras but can also be used on APS-C Sony E cameras with a crop factor of 1.5X applied to its focal length.

Q: 2. What range of wavelengths of light LESS THAN 400 nm does this lens transmit at least 50% of? At least 25% of?

A: Unfortunately, the manufacturer does not rate the lens for IR absorptance. However, as there is no IR coating, such near IR in particular should be expected to pass with little attenuation.

Q: 3. What does the S denote in f1.8S?

A: The "S" in the Yongnuo YN85mm f/1.8S DF DSM Lens for Sony E-Mount (Aluminum Construction & Waterproof Bayonet Ring) name refers to the Sony mount.

Q: 4. The description says this lens is designed for APS-C cameras but I've seen a number of reviews which say it is for full-frame cameras. Does it provide full-frame coverage or only APS-C coverage?

A: This lens provides full frame coverage.

Q: 5. Does the NIkon Z-mount version have a metal body?

A: The Yongnuo YN85mm f/1.8Z DF DSM Z-mount lens has a plastic body.

Q: 6. Is this lens weather sealed or resistant?

A: I am sorry the Yongnuo YN35mm F2R DF DSM Lens (RF Mount) is not weather sealed or resistant.

Q: 7. Is lens hood included or not?

A: Yes, it does! To be 100% sure, I checked inside the box and I will have them update the listing page. Sorry for the confusion! :)

Q: 8. How would this compare to the Sony 50mm 1.8?

A: The Sony 50mm f1.8 lens is much higher in quality and currently lower in price than the Yongnuo YN 50mm f/1.8S DF DSM Lens for Sony E.

Q: 9. Is the focus ring linear and throw consistent for video focus pulling?

A: Yongnuo YN85mm f/1.8S DF DSM Lens for Sony E-Mount has a wire/electronic focus ring. your camera will indicate the the focal distance of the lens. Ther eare no set stops on the ring when you reach infinity.

Q: 10. Is this lens compatible with a7 III? As different sources say different things on the same lens

A: No, the Yongnuo YN 50mm f/1.8S DA DSM Lens (Sony E), BH #YOYN50F18SDS is not compatible with the Sony a7 III Mirrorless Camera. However, the Yongnuo 50mm f/1.8S DA DSM II Lens (Sony E), BH #YO5018SDADS2 is compatible with the Sony a7 III Mirrorless Camera. https://www.bhphotovideo.com/c/product/1779365-REG/yongnuo_yn50mm_f1_8s_da_dsm_ii_yn_50mm_f_1_8s_da.html