[Buckster]

I recently bought a 300mm F4 - and whillst its taking some great sharp photos in my opinion, there are 2 weirdies, one is quite a lot of Chromatic Abberation which has suprised me, and the 2nd - in some circumstances I'm getting a double image through the viewfinder ... BUT it does not show up in the recorded image, even at wide open...

1st one - CA - here is a shot - this is about a 120% crop - would you really expect that amount of CA ?

the 2nd one - is a bit more worrying - say I take a photo of a plane landing, coming towards me, in the daylight, it has 3 lights for landing, in my viewfinder I can see the 3 lights, and an exact duplicate of all 3 lights further down ... any ideas why .. there are no filters on the front, and the double image doesn't show up on the recorded image, even when the lens is wide open. I had a similar even the other day where I was taking a photo of a captive eagle, and I could see a complete double outline of the Eagle.

Any ideas ?

Thanks, Mark.