DSC_6476 by Dougie Lindsay, on FlickrExif data for focal lengths would be very useful for the OP.
Snapper67: I'm assuming your photo of the plane was taken @ 300mm?
The reason I ask is the photo isn't sharp and this tends to be the norm on budget lenses.
r.

Egglestone Abbey, Barnard Castle, Durham by Liam Dobinson, on Flickr