I’ve been trying to figure out the best way to extend my focal length for an upcoming season of wildlife viewing since my 70-210mm is the longest lens I currently have and I was not happy with that lens ability last summer.
I’m also not really wanting to have to spend $600 plus to get it Sony glass or have to spend more to get adapters to use Canon or Nikon glass, so after some research I found the solution for me: the Sony VCL- DH1758Â Tele Conversion Lens with a step-up ring.
The image below shows what it looks like with 70mm (left), 210mm (center) and the  DH1758 (left) extended fully on the 210mm (left), all shots done without a tripod.  What a difference! I’m excited to see what kind of results I get this season.
70mm, 210mm, 210mm w/ DH1758