I would love to own a 500mm or 600mm so I was experimenting with the 2X extender to simulate 600mm. Of course the 2X extender slows down the AF and softens up the images a bit, but I'm trying to see how I like the 600mm range. It seems like I could really use the extra reach. The last photo is with the 1.4X extender.


1D-MKIV 300mm f/2.8L IS + 2X @600mm f/7.1 1/500sec- 1/1250sec, ISO 400 CPL


I definitely needed a faster SS on the 1st one. I let it drop to 1/500sec. by accident.


The American Oystercatcher's are very fast and they fly very erratically. I had a hard time tracking them with the 600mm angle of view, but I do like the reach.


They make very tight turns and then they dive down towards the water.


They were definitely going over the 5 MPH speed limit.

































C&C Welcome!


Thanks for viewing,


Rich