As many of you know, my young son has recently taken to photography with enthusiasm. About a month and a half ago, I bought him a Promaster 70-300mm f4-5.6 LD Macro zoom. This is actually a Tamron lens and the specs for it can be found at:
http://www.tamron.com/lenses/prod/70300_di_a017.asp
His results with it were better than I expected so I finally took it out myself for a test drive.
All shots here at manual focus, manual exposure at ISO 400, f/8, 1/1000s, 300mm, and hand-held. Post processing was with the same settings/scheme that I use with my 300mm prime.
All images uncropped.