I am trying to get some nice shots of a close up of a bird like the ones pictured in the birds forum.
It seems to mee I have wasted money buying a new lens when I cannot get closer to a bird than with my Tamron 70 - 300 mm lens.
this was taken with a Sigma 120 - 400 mm lens is this wrong?
Call me gullible as was told to buy a better lens so did so and does'nt seem to make that much difference.:shake:
A 400mm lens will make things appear 1/3 larger than a 300mm lens, so the new lens will help a bit, but it won't be like night and day. But certainly, for small birds like this you need to be as close as possible. With great glass, great light and great technique you might be able to get something useable from a distant, small subject, but it won't be easy. Here's an example of one of mine, to show what might be possible with good light and reasonable glass (ignore the technique bit)....
Full image....
100% crop....
Now this isn't perfect by any means but it's not awful. This was shot at the 400mm end of my 100-400 zoom and I had my 1.4X teleconverter fitted as well, so this was actually a 560mm lens. The light was good, which gave me some nice contrast and also allowed me to stop down a bit, for better lens IQ, while keeping the shutter speed up a bit and all without pushing the ISO too far. For stability I also used a tripod. I think I used 10X Live View for focus, to get it as perfect as possible.
Of course, if I'd had a prime lens instead of the zoom and got myself a lot closer (not possible in this location) the image would have been better, but this was the best I could manage on this occasion.
A couple more examples (Good light really is your friend)....
Full image. I'm not sure whether I used the 1.4X on this shot. EXIF says 380mm, f/8 but judging from the light, the ISO and the shutter speed I'm thinking 532mm and f/11 with taped pins...
100% crop.... (definitely not quite there, but then 100% crops from a 50D are pretty punishing)
Full image. This was at 560mm, f/8....
100% crop....
Briony, can you post an original uncropped, unedited full sized version of your image somewhere, so that we can understand what we are looking at and what camera settings were used. It might help unravel the mystery a bit. I don't think there is much that can be done with a 155x166 pixel JPEG file.