50mm S Mount Lens
Related Faq
Q
Can I see objects in dim light?
A
For this binocular 20x50, as the diameter of the objective lens is 50mm, for binoculars, the larger the diameter of the objective lens, the more light it collects and therefore can be seen more clearly in dimmer places. Please note, however, that dim/low light ≠ night vision and cannot be used in total darkness. 
Q
Will this work with the pentax mount asahi takumar smc 50mm 1.4?
A
Yes. I have the same lens and adaptor on my Sony a7ll and it works beautifully. The m42 is also known as the 'universal' mount as other 3rd party camera and lenses also used it. I own 6 other K&F e-mount adaptors to different lens makers (ltm, MD, CF/CD, Nikon) and they all are well built with a nice snug fit. Highly recommended. 
Q
Will the nikkor 50mm 1.4D work with this?
A
Yes, the Nikkor 50mm 1.4d is an f mount lens so it should adapt just fine. 
Q
Hello, i have a nikon 50mm af-s 1.1.8g lens. is this compatable?
A
I don't have that lens with me. On the inside of its lenscap and on the ID on the lens, there should be the size of filter needed. If it requires a 58 then you are fine. There are also adapters to go up or down. 
Q
will this fit on a 50mm prime lens canon?
A
No 
Related Video
K&F Lens Adapter + Pentax-M 50mm F1.4 + Sony A6000
K&F Concept® Lens Mount Adapter for Canon EOS EF mount Lens to GH4
K&F M10111 M42 Lenses to Fuji X Lens Mount Adapter
Related Blog

Universal Solar 70mm Lens Filter 50mm E Mount Lens 50mm C Mount Lens 50mm F Mount Lens 50mm L Mount Lens 50mm M Mount Lens 50mm X Mount Lens 50mm Z Mount Lens A Mount 50mm Lens K Mount 50mm Lens

White Balance Lens Filter Cap Nikon Ftz Adapter Refurbished Aivascope 1.5x Anamorphic Lens Adapter Mft To B4 Lens Adapter Canon Cine-servo 17-120mm T2.95 Lens Ef Mount Fujifilm X Pro1 Canon Adapter Olympus Ep1 Lens Adapter 8mm Camera Lens Mount Z Mount Nikon Win Pentax 645 Adapter M2