Originally posted by UncleVanya Are there any opinions here about the longer lenses for m43? I use a Panasonic GX-1 so I really strongly prefer an OIS Panasonic lens. I'm also not interested in pro lenses for this camera - my current lens telephoto is the 35-100 f/4-5.6. I want to know which lens, the 45-150, 45-175, or 45-200 Panasonic seems the best?
Of these lenses, the 45-175 would seem to be the best. It's features Panasonic's high end nano surface coating for contrastier images, it's sharper at the long end than any other m43 consumer grade telephoto zoom, it's an internal focusing
and internal zooming lens, it sports the (allegedly) superior "power" OIS (compared to the "mega" OIS of the other two 45-xxx zooms), and it's compact and lightweight, coming in at 210 grams (the 45-150 weighs 200 grams while the 45-200 weighs 380 grams). The 45-175 is also the most expensive of these lenses --- but then you pay extra for what it brings to the taBLE. It's, to be sure, not as sharp as my Tammy 70-200, but it's much smaller and very much lighter in weight. Panasonic markets the 45-175 as a premium lens, and to my mind, it's exactly what an m43 lens should aspire to be: compact, lightweight, but with very good performance nonetheless, especially in terms of contrast and consistency of sharpness throughout its entire range.
An image from the Pany 45-175 @ 175mm:
Originally posted by UncleVanya I am also interested in how much better the 100-300 Panny or 100-400 PanLeica are over these.
I wouldn't expect there to be much difference in sharpness between the Pany 100-300 and the other 45-xxx Pany zooms, although you'll get contrastier images with the 45-175 because of the nano coating. The PanLeica 100-400 is in another class altogether, especially in the 100-300 range, where it's supposed to be absolutely stellar.