A few months ago I traveled to the jungles of Panama & Costa Rica with the primary intent of trying out the new Olympus M.Zuiko 300mm f4.0 PRO lens (equivalent to 600mm full frame). I decided to break the trip into 3 posts. The first one being Fauna, the second one will be Flora and the last one will be Patterns. 80% of the images were shot with the OM-D E-M1 and the remaining ones were shot with the OM-D E-M5 MkII. The ISO’s averaged between 1,000 and 5,000. I was not disappointed with the results, however, I’ll let you be the judge.
Frank's Photography Blog 
Great quality…I also own the 300, but am anxiously awaiting the arrival of the new EM1 Mark II, which will supposedly provide even better quality pics…did you use flash on any of them? If not, do you think it would have made a difference, and if so, which brand and model? Hope to see you at NatureVisions.
Thanks for the kind comment. Regarding your question, I did Not use any flash. I have been using higher ISOs and don’t find the need for one. I can tell you when you pair this with the new E-M1 MkII it is absolutely amazing! I won’t be at NatureVisions this year.
Amazing shots!
Thanks much!
absolutely fabulous Frank.!
Thanks David!
Wow!! Amazing Frank!!
Thanks Deb!