ORpilot wrote:
Go for the Sony 200-600mm G or the Sigma 150-600mm. The 100-400 is a bit short. I own the Sony 200-600m and there are times I wish I had the 1.4X .
I chose the Sony 200-600mm f5.6-6.3 for wildlife and action sports. I considered the Sony 100-400mm but when you need it, there is no substitute for the longer reach. I also use my 200-600mm with Sony 1.4X and 2X Teleconverters and still get excellent results.
The main advantage of the Sony 100-400mm vs the Sony 200-600mm is that the 100-400mm is smaller and lighter, easier to pack in smaller bags and carry around all day.
The main advantages of the Sony 200-600mm over the Sony 100-400mm is that the 200-600mm is an internal zoom and doesn't extend when you zoom like the 100-400mm does, and the 200-600mm has a very short rotation turn to full zoom, whereas the 100-400mm takes a much longer rotation for full zoom. I can handhold the Sony 200-600mm and manage a full zoom with just a short movement of one finger.
I am a longtime pro, and tried both the Sony 100-400mm and the 200-600mm and settled on the 200-600mm and have no regrets. There are good third party 150-600mm lenses also for Sony, but the Sony 200-600mm outperforms them all.
Here a few shots with my Sony 200-600mm:
1) A Great White Egret bends its neck to clean its feathers on the Caribbean Island of Sint Maarten/St. Martin. Sony A1, Sony 200-600mm lens, 591 mm.
2) a tight crop from the same shot of the Great White Egret. A1, 200-600mm lens, 591mm
3) A Snowy Egret takes off from its watery perch in Sint Maarten/St. Martin .Sony A1, Sony 200-600mm lens, 319mm, 1/4000 sec.
4) Wild Iguanas share some affection on Sint Maarten/St. Martin. Sony A1, Sony 200-600mm lens, 600mm
5) and 6) Kids get pulled by a fast speedboat on Brookings Lake, Manistee National Forest, Michigan. Sony A1, Sony 200-600mm lens, 600mm
7) Famed Monument Valley, scene of countless movies, TV shows, Commercials, Navajo Lands, Arizona/Utah border. Sony A7RIV, Sony 200-600mm lens, 250mm
8) Wild Elephant Sea Lion rookery on the Pacific Ocean coastline, California. A pup squeals as it tries not to get crushed by a 5000 pound amorous bull going after one of it cows . This pup got squeezed but survived, they dont always survive the bulls. Sony A7RIV, Sony 200-600mm lens, 600mm
9) Sony A9 with 200-600mm lens and 2x Teleconverter, 1200mm. Jet skier on Brookings Lake, Manistee National Forest, Michigan
I have no problem carrying my 200-600mm in the field, it is well balanced and i am used to the weight. A majority of Wildlife pros polled prefer using the excellent Sony 200-600mm over using the excellent 100-400mm for many reasons, but mainly for its reach and internal zoom. I am one of the those pros.
Many love their 100-400mm, but for this pro there is NO substitute when you need the reach and want to utilize all your image quality without going into APS-C mode or clear-image zoom .
I have owned the Sony 200-600mm since the first USA shipments in August 2019 (Sony Pro Support Member's Priority) and I have used it all over the world and never once regretted it or wished for the excellent 100-400mm instead. Either one is excellent.
Alpha Shooters : Sony 200-600 G vs 100-400 GM Review & Comparison
https://www.alphashooters.com/compare/sony-fe-200-600-vs-fe-100-400-gm/FYI, I have owned Sony A6500, A7RII, A7RIII, A7III, A9, and currently own Sony A1, A7RIV, A7SIII.
Cheers and best to you.