Yeehaa, I got it.

Thanks Birddog, my new Sigma lenses arrived safe and sound.
A quick play with the 180 Macro (hand held as usual) before the light went this evening.
I am using the RAW / JPG combo setting and these are the low res JPGs as I can't process RAW on the laptop (takes forever).
The first two follow each other. These bees or wasps stick out a spear as they approach the flower and then dive right on in. Had no idea untill I looked at the shots on the laptop.
Shadow
Impact
100% crop of said waspy bee things
Near miss
Water
1st impressions are very favourable from ease of use, focus, bokeh etc. and it will be a nice telephoto as a bonus.
A quick play with the 180 Macro (hand held as usual) before the light went this evening.
I am using the RAW / JPG combo setting and these are the low res JPGs as I can't process RAW on the laptop (takes forever).
The first two follow each other. These bees or wasps stick out a spear as they approach the flower and then dive right on in. Had no idea untill I looked at the shots on the laptop.
Shadow

Impact

100% crop of said waspy bee things

Near miss

Water

1st impressions are very favourable from ease of use, focus, bokeh etc. and it will be a nice telephoto as a bonus.