I have used it on my Nikon D850 for star pictures mostly and with it being just f2.8, it is fast enough to use in any low-light situations and nice and wide at 14mm. I have found it to be incredibly sharp.
eBay
37MM/43MM 0.3X HD Ultra Fisheye Lens Adapter Fisheye Wide Lens Adapter with Hood Only for Video Cameras Camcorders
Aliexpress UK
Returns are free and are allowed within 30 days of receiving the item purchased. If the item is brand new, there may be a small restocking fee due to the item becoming open box, depending on the item. The item is to be returned in the condition that it was sent out as and include any additional accessories, booklets, or media that came with it. If the item is not returned properly, a partial refund may occur. If the item has the "Best Offer" option available, I am not obligated to accept. Generally speaking, the safest option to secure your purchase is to do "Buy It Now". Offers are treated on a case to case basis. Also consider that there are other people sending offers and yours will not be accepted if someone else has a higher offer. Feedback is also welcomed, and it would greatly help.
eBay
8mm F/3.0 Aspherical Circular Camera Lens Ultra Wide Fisheye Lens for Canon DSLR 550D 650D 750D 77D 80D 1100D Cameras free shipp
Aliexpress UK
We are located in Japan.
eBay
VELEDGE Ultra Fisheye Lens Adapter 37MM/43MM 0.3X HD Fisheye Wide Lens Adapter with Hood Only for Video Cameras Camcorders
Aliexpress UK
[MINT] Nikon Zoom NIKKOR AF 80-200mm. F/2.8 D ED New AF Lens. Front Lens Cap, Rear Lens Cap, Genuine Hood, Kenko Protector Genuine Case. from Japan. MINT Condition, Pre-owned, almost no sighs of use.
eBay
3 in1 Fisheye Phone Lens 0.67X Wide Angle Zoom Fish Eye Macro Lenses Camera Kits With Clip Lens Kits On The Phone for Smartphone
Aliexpress UK
Suitable for Cannon. Really good condition only used twice
eBay
VELEDGE Ultra Fisheye Lens Adapter 37MM/43MM 0.3X HD Fisheye Wide Lens Adapter with Hood Only for Video Cameras Camcorders
Aliexpress UK
Opton (same as Rokinon, Samyang) 8mm f3.5 Fisheye CS DX Aspherical Lens for Nikon F. Excellent and unmarked condition. Fills the whole frame on a DX sensor. Manual Focus. Very sharp lens. Front and rear caps included.
eBay
3 in1 Fisheye Phone Lens 0.67X Wide Angle Zoom Fish Eye Macro Lenses Camera Kits With Clip Lens Kits On The Phone for Smartphone
Aliexpress UK
+ 4 x Hoya 49mm Filters + 2 stepping ring 37- 49 & 36-37 & Rokinon Semi Fish-eye - Rear. The filters are circular in shape and have a 49mm size, making them compatible with a variety of lenses. The green filter is specifically designed to enhance green tones while reducing glare, making it ideal for outdoor photography.
eBay
Ulanzi Mobile Lens 75mm Macro / 8mm Fisheye / 16mm Wide-Angle / 60mm Telephoto Lens Smartphone Shooting Photography Accessories
Aliexpress UK
Excellent condition Clean and scratch free optics Perfect working order Boxed
eBay
8mm F/3.0 Ultra Wide Angle Fisheye Lens for Nikon DSLR Camera D3100 D3200 D5200 D5500 D7000 D7200 D800 D700 D90 D7100 free ship
Aliexpress UK