dumb stuff

[glb]

way back with the a mount camera sony A100 I had an idea I had two 2x converters put them together then put them on a 300mm lens well it worked but really not that well.

[tonygale]

It's always worth giving things a try!

[DonSmith]

Good idea but I would imagine the sharpness was not good - rarely is when stacking converters...