You dont need the newest fastest lens to get great shots. This was shot with an old olympus lens on my nikon DSLR. Try the charity shops your loft or your family. I got this lens OM 65-200 f4 from family its not cheap 2nd hand but its free for me to use for a while. I shall miss it when I have to return it but it has given me some great shots. I also found a zenith at a car boot sale for £15 with 4 lenses and accessories. start the search!