gary8803 wrote:
I post earlier on this site for recommendation plus some other sites. Here is what I think I will get.
Nikon D500 $1200 used like new condition.
Nikon 300 2.8 vrii $3000.00 used ex condition.
teleconverter 1.4 have not priced yet.
my budget is $10000.00 but really would like to stay lower I'am not a professional just want good pictures in low light conditions weight limit is 10 pounds for camera and lens
You will be walking a lot in Costa Rica, the last thing you want is to be carrying a 300 2.8 lens around.
I believe you are limiting your self to one angle of view and this will not do in Costa Rica, you need to quickly change your field of view, adding a 1.4 and coming up with a 675mm lens still does not deliver enough of an option.
And, when you come home, you'll still be stuck with a very heavy lens.
I have shot extensively in Florida wetlands with the 300 2.8, 500 5.6 FL, and the 200-500 5.6 on the Nikon D500. The Nikon 200-500 delivers a field of view of 300-750 mm, I have never needed anything else for birds in Florida.
Unless you are enlarging an image to say 30X40 you will not notice any loss in image quality in the three lenses listed above.
IMHO, I believe your better off with the Nikon 200-500, it is more versatile than either of the 500's, comes with a 5 year warranty, the 300 2.8 comes with no warranty and parts in a few years will be hard to find if it needs repaired.
Trust me, your going to constantly on the move in Costa Rica, you need one lens that offers a variety of viewing distances, you will be much better off with the 200-500 mm 5.6 E.
Below is just a grab shot in Florida of a Great Blue Heron carrying nesting material in the early morning, your D500 will handle low light just fine, this one was shot a 1/5000 sec. wide open at f5.6 on a D500 at ISO 1250. You be the judge.