Hi all, I got this as a gift, but it seems to me non working: I can cock and fire the shutter, but curtain does not open. Maybe it needs battery? Prost lens had an issue with f stop leaves, it does not open completely. Vivitar lens seems to be ok - but I have no idea is it or not. I am nikon guy, so no minolta knowledge. Selling all this without any warranty for 15 euros plus shipping (worldwide, as usual). As always - open for trades - make me an offer.