Tamron 300 f2.8/Stacked 1.4X Converters
As an inspiration from Ron, I tried out the Pentax 1.4X Rear Converter stacked with the Keno 1.5X and the Tamron 300 f2.8 on the K3. The example shot of a Loon was also cropped. This combo has some potential but I will try it next with the DA* 300 as it is a sharper lens.
|AF4_2483 Surfing the Serengeti by DaveInHouston|
from Hot Air Balloon view
|Peregrine Falcon by Psychic1|
from Best Wildlife Photo of the Week - 4