Choosing the right lens(es) to shoot on can be a challenge, especially for a camera like the Sony FS100. Not because it has limitations; rather because it will accept a massively wide range of lens options. A prime lens kit is great to have but sometimes it’s nice to have the versatility of a zoom lens. Parfocal lenses are lenses that maintain their focus throughout the zoom range and while some claim to be, they not always are. EventDV put together a great write-up and demonstration video showing off how different lenses work on the Sony FS100. If you’re considering a zoom lens for your camera, you should definitely check it out.
Parfocal zoom lens shootout on the Sony FS100
Thanks for posting a link to my article, Tony. Here is another lens I tested after the shootout – the Sony SAL1650 DT 16-50mm f/2.8. It is parfocal, fixed f/2.8 aperture, has a beautiful and sharp image, costs less that many of the other professional SLR options that it outperforms, and has smooth handling.
http://bit.ly/tUaXdI
sorry but were you given the lens my sony becausse the one i got is absolutely not parfocal
@d151823fbb1ad577fa80474d9b4b5d54:disqus If you are asking me if I was given the lens by Sony, I wasn’t. As I mentioned in my article on the SAL1650 lens, I bought my lens at a local Vancouver camera dealer.Â
A parfocal lens only works one way – telephoto to wide. Technically it works back to telephoto again but you have to first start at telephoto, manually focus, and then when you change focal length it should remain in focus.
If you manually focus when wide and then zoom in, you won’t still be in focus because the more you zoom in, the shallower your depth of field becomes.
Hope this makes sense. If your lens doesn’t hold focus from telephoto to wide then I would exchange it for a different copy or have it serviced.