I'm using the above Tamron lens (A mount) with the LAEA3 on my Sony A6300 but finding it very hard to get feather detail on stationary birds. To get a well enough exposed image I'm having to go to an ISO of 1600 with an f stop of 7.1 at 1/250. Rarely do I get light good enough for an ISO of 800 and below. It means I'm not really getting the detail I'm looking for. I also find that my best images are at 420mm I'm wondering if my adapter and non-native lens is resulting in lost light and performance. What kind of ISO are people looking at at this time of year on Nikon and Canon equivalents? I'm considering moving to Nikon as the images I've been seeing seem more detailed from the likes of the D500 with the same Nikon fit lens. They seem to have a lot more margin for adjusting for quicker shutter speed and lower ISOs Anybody moved away from Sony in the pursuit of a better wildlife combination?