It will be a manual focus on lenses such as the Nikon 70-300 as is a slower aperture.
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500mm f/6.3 MF Telephoto Mirror Lens +2x Teleconverter =1000mm for Nikon Canon Sony DSLR Camera and Macro 4/3 Mirroreless Camera
Aliexpress UK
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55mm 2X Telephoto Lens Teleconverter for Canon Nikon Sony Pentax 18-55mm-BtLife
Aliexpress UK
This will work with both Af-s (built in motor) and AF-d lenses, so can be used with all Nikon AF DSLR cameras. As with all teleconverters it will only autofocus with lenses faster than F4, so it can not be used in autofocus with slower zoom lenses eg 70-300mm F4-5.6, it can though be used in manual focus with such lenses. Note: The following lenses will only work in manual focus: AF-S Micro Nikkor 60mm f2.8 AF-s Nikkor 14-24mm f2.8 AF-s Nikkor 24-70mm F2.8.
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for nikon F Mount Camera Telephoto Lens 420-800mm F8.3‑16 Zoom with 2X Teleconverter
Aliexpress UK
Near mint condition, looks like it has had little use, 30 day warranty from seller for peace of mind This will work with both Af-s (built in motor) and AF-d lenses, so can be used with all Nikon AF DSLR cameras. As with all teleconverters it will only autofocus with lenses faster than F4, so it can not be used in autofocus with slower zoom lenses eg 70-300mm F4-5.6 it can though be used in manual focus with such lenses. Note: The following lenses will only work in manual focus: AF-S Micro Nikkor 60mm f2.8 AF-s Nikkor 14-24mm f2.8 AF-s Nikkor 24-70mm F2.8.
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52mm 2 in 1 HD 0.43X Super Wide Angle Macro Lens for 52mm Filter Size Canon Nikon Sony Camera Lens Teleconverter Wide-angle Lens
Aliexpress UK
Compatible with select Nikon AF, AF-S, and AF-I lenses. Ideal for wildlife, sports, and long-distance photography. Excellent condition. Durable, lightweight build.
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There is fungus in the optics. This issue does not effect the images captured or impact upon the lens performance. The lens has been priced to reflect this issue. There are no exterior marks / scratches on the glass.
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