I've been wanting a little more flexibility in a long reach lens and decided to take the plunge on the 'Spawn of Bigma'. The lens arrived today and it looks like i may keep it as I will be leaving for florida in 2 weeks to do some camping/sunning/wandering. I have 14 days to return it and hope to give it a workout in the next few. The lens is well made, focus locks on very quickly and is whisper quiet. It also has focus lock and af/mf switch (no OS in Pentax/Sony incarnation). Color rendition is quite good as well as image quality (though i'm getting mixed results). Sparrows rarely sit still and with the current minus temps here in chicago, i do get the shivers, both of which could be culprits in my image quality issues. From 120mm to 250mm i can get very good IQ shooting handheld indoors between iso200-400 (forget outside until spring). Beyond 250mm I need a sturdy tripod or monopod. I will post a review once I come back from FL, if it gets a thumbs up. In the meantime, heres a size comparison of f*300mm w/1.5TC attached and the 120-400mm plus a two 400mm pics w/crops straight from the camera, no PP.
Last edited by ivoire; 04-18-2009 at 09:24 AM.