Hi Indrajeet, I have to chuckle that you think this lens is light. It weights 4.5 lbs. and to me it's heavy, especially with all of my other gear. I usually leave it at home unless I'm driving somewhere and not hiking too far. I did hike into Brooks Falls in Katmai National Preserve with it (about 1.5 miles, one way), but wouldn't take it further. Do you have other lenses that are heavier?
That aside I love your pictures, the first one even shows the rain falling, and the fifth one looks like an upset little guy who would rather be out of the rain. Great Set. :thumbup: :thumbup:

Confident with the capability of the lens, I moved into other areas where I tested for performance under some of our difficult(ish) conditions. Though the avian life in India is awesome, the birds are shy and difficult to approach. Waiting is often times the most rewarding and speed is of essence because they are always so busy and the moments to capture are often very brief.

It is important therefore, that your gear is set up for such situations and also that the auto focus system is able to accurately focus in an instant. It is not unusual to suffer a lens hunting to find the subject. Deep shadows, reflected light and bright foliage are the reason for this. Result, lost images.

I was keen to see how well the Tammy worked in some of these situations. Other considerations included sharp results at “as wide an aperture as possible” and at respectable ISOs and low shutter speeds. Alongside, focus tracking requires to be strong to follow the bird as it disappears behind foliage and twigs and leaves. I know I am asking for a lot, but if I am able to get these I am a happy chappy!!

All shot at 500mm in DX 1.3 crop equaling 1000mm effective crop. Tripod mounted.