Re: Sorry some lens advice needed for a lumix gf6 Newbie
Andy Thomas wrote:
aliasfox wrote:
No AF on the lens you linked to.
A 4/3 lens will work, but the adapter will set you back at least 50GBP, and focus will be very slow, even on 'optimized' lenses. My 14-54 mkII is one of those slow focusing options.
does it prevent you using it? I would be using it for more stills work in the dark more than action shots
thanks
The Panasonic 20mm is a fine lens. The focus issues are in my opinion, overblown.
The Oly 17mm will autofocus, as will any native m4/3 lens from Panasonic and Olympus. If budget is a concern, I'd stick with the Panasonic 20mm, but both are fine lenses that should work wonderfully on your camera.
I wrote that on my iPad immediately after waking up and getting ready to go to the office, so allow me to elaborate:
To run a 4/3 lens on a m4/3 body, you'll need an adapter just to get it to fit. I got mine for about $60 USD, though recently I've seen Buy it Now auctions on ebay for as low as $25. My guess of 50 GBP for you was based off of those numbers.
After the lens is mounted, you'll realize focus is slow. Like really slow. This is because 4/3 lenses were designed with phase detect autofocus in mind (PDAF), which most m4/3 cameras don't have. Micro 4/3 relies on contrast detect autofocus (CDAF) instead. The short version of how they work is that PDAF can not only tell that a lens is out of focus before it even moves the lens, but it can tell the lens what direction it's out of focus (focused too near or too far), and by how much. CDAF, on the other hand, relies on moving the lens elements back and forth and finding the point where the contrast on the image sensor is the greatest - the thought being that the greater the contrast, the sharper the image.
What does this mean? It means that the camera body has to move the 4/3 lens back and forth a couple of times, something it wasn't designed to do. Focus might end up taking 2-3 seconds, and in low light, even longer.
Does this mean you can't manually focus? Not at all. Manual focusing is great! However, it will take some practice. I have an E-PM2, which is similar to your GF6, and I find it fairly hard to manually focus using my LCD. I've gotten an EVF and it makes focusing much easier, but I don't think that's an option on your body.
If you're ok with slow autofocus or manual focusing, then the 4/3 lens is fine - I break out my 4/3 lens whenever I'm expecting to shoot things that don't move - it's not only my most versatile zoom range, it's also incredibly sharp. However, the 4/3 25mm lens might become redundant if you're planning on getting the m4/3 PL25 - in which case, why not take a look into some good manual glass? Olympus OM and Minolta MD glass is quite cheap - 50mm f1.7 lenses run for <$30 in the US, and the requisite adapters usually go for about $10. I can't imagine you'd have to spend more than 50 GBP on the whole set. It might not be 25mm, but if you're shooting stills, maybe you have the opportunity to take a few steps back anyway?