Fantastic shots! Now where are you located? That coast line is incredible. BTW on the first shot, did you happen to use a polarized filter? I ask because, those clouds might have popped a tad more with it being used.

Either way, love the shots.

-C

I have tried the new portrait mode on my iPHone X and honestly find it tough to get the look I want. I think Apple is pointed in the right direction, things should be refined a lot more in next iPhone 9 or XI. LOL what ever they end up calling it.

Cool shot though!

Sony raised the bar with this camera. How the sensor captures like is remarkable. I'm a Nikon user, which of course, has been using Sony sensors for a number of years. I hope the next generation Nikon D850 will include a sensor closer to this particular one Sony used in the A7RIII.

My D800 had nearly the same sensor as my A7R (original)

I was going to say the same thing. Kind of like, Sigma and camera bodies. I would buy a Sigma lens all day, but not their cameras.

Larger primes weigh a TON and will be best used with a gimbal. I don't know what your budget is so I'm going to post something in the lower end of the middle: https://www.amazon.com/dp/B016V1AVV4/ref=asc_df_B016V1AVV45344203/?tag=hyprod-20&creative=395033&creativeASIN=B016V1AVV4&linkCode=df0&hvadid=198104292682&hvpos=1o3&hvnetw=g&hvrand=2033474769165469198&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031532&hvtargid=pla-385165946318

Next, have you looked at the Sigma 150-600mm? This could be a good option for you that will give greater range of use: https://www.bhphotovideo.com/c/product/1082152-REG/sigma_150_600mm_f_5_6_3_dg_os.html

Making the jump, then consider the D7500 vs the D7200 IMO https://www.nikonusa.com/en/nikon-products/product/dslr-cameras/d7500.html

Nicely captured! Caverns are tough to photograph. You nailed it here. How long were you there for?