Vivitar Series V2XMR 1 T-Mount 2X Converter for F/500mm, 420-800mm,650-1300 Lens Review

Works great with my telescope lens. (of the same brand). Now I can see the moon bigger and better! This mount has excellent auto focus and excellent image quality.

Excellent attachment for my Vivitar 650 lens and Nikon camera. The seller was very quick when contacted about a minor discrepancy.

Bower 500mm lens is worth the money. When using the 2X converter you have to adjust it to add more light but as you can see the converter takes great shots. since I also added a picture of Nikon 28-80mm to show you the difference between the distance; Everything was shot with a Nikon D7000 tripod camera. I highly recommend this product!

Very easy to use, well made, the threading matches my lens perfectly and doesn't add much to the chromatic aberration or distortion despite increasing zoom capability as expected. I use it in a very basic manual telephoto lens (cheap) and it works great. Recommend for intended use. If you need higher image quality, you should look for a telephoto lens with a fixed focal length instead of using any multipliers. The seller was great too.