I'm wanting to get into macro photography but won't be able to afford a dedicated lens for a while, but another member advised me about the raynox 250 adapter which looks a good interim option. I thought I'd start a new thread rather than it being lost on another as it might help others who may be looking into this adapter. Looking on the website it says that the snap on adapter is only suitable for lenses with a filter diameter up to 67mm. Whilst this will be OK for my Sony 55-300mm lens it won't fit my Sony 16-50mm which has a filter diameter of 72mm. Ideally I'd like to use the 16-50mm lens as it has much better IQ. Is there an adapter for large diameter lenses? Secondly, it says the min focussing distance is 109mm with the lens set to infinity, but is this on top of the original lens' min focus, 109mm from the adapter regardless of which lens, or 109mm from the sensor? I assume it can't be the latter as some lenses are longer than 109mm. If it's 109mm from the front of the adapter is this going to be far enough away to not scare critters away? I know the sigma 105mm has a min focus of 312mm, but this is from the sensor, so taking into account the length of the lens being 126mm, and the sensor being towards the back of the body, I'd estimate that the front of the lens would be about 165mm away, so 56mm (2") further than the raynox (assuming the 109mm of the raynox is from the front of the lens). Any help appreciated.