Good feedback, except where a blind or leaves came from I don't know? Have used this lens for a while and only recently experimented adding the additional extender. I entered it wrong: no tripod that day. The results are only so-so but it was worth a try and the trade-off is having more usable pixels. With that, have tried gently sharpening a bit more and I've cleaned up the background around the claws. Since there are only a handful of this species on the site, thought in that regard it was a good addition. Thanks again for the help. Dave