Hello, I'm currently in the market for a 300mm zoom that won't break the bank. Edit; after the suggestions that have been made here I now intend to get either a 300mm legacy "prime lens" or the Panasonic 100-300mm zoom and not a legacy zoom. I have a Panasonic G3 camera (which I bought off a member of this forum back in February) and among other lenses, I have a panasonic 45-175mm zoom which I'm using for wildlife The problem is, I'm finding 175mm is really too short for birds and animals so I'm looking to dip my toe in the water of longer lenses. The Panasonic 100-300mm looks good, but is a bit expensive for a lens that I know will be on my camera at most about 10% of the time. Therefore I am looking into legacy glass. The lens I'm looking for has to be 1)cheap because if it was anywhere near the price of a used panasonic 100-300 I'd just buy the pany instead and get the benefit of autofocus and image stabilisation. And 2) capable of reasonably good output. By reasonably good I mean I should, after a bit of practice, be able to out-perform my existing Panasonic 45-175mm for critters that are at least 50m away (which is about as close as they'll let me get). I'd also like if the lens wasn't too heavy because the lighter it is the more likely I am to use it, which is part of the reason I got into m43 in the first place... Some lenses I'm considering are; Canon FD 100-300 F/5.6. The "non-L" is very cheap, about 50 euro, but a bit heavy at 880g. The "L" is out of the question as it's nearly as expensive as a used Pany 100-300. The rest are all less than 150 euro (175 dollars); Tokina 60-300mm f/4-5.6 SZ-X (730g) Sigma DG APO Macro 70-300mm f/4.0-5.6 (545g) TAMRON AF 70-300mm f4-5.6 Di LD (435g!) I don't actually know much about these lenses or even if they would be satisfactory for my needs, so If anyone has used any of these lenses and can comment on them or has any other suggestions for a "cheap, light, reasonable quality, 300mm zoom" I'd certainly appreciate it. If you've read this far thank you very much.