Need suggestions for camera upgrade please!

[prasad23]

Need your suggestion on this one please..

I have been using my Nikon D5300 for Landscape and Astrophotography. I got a Tokina 11-16, a 50mm f1.8 and the 18-55 kit lens.

I mostly shoot in challenging weather conditions while trekking in himalayas. I would also love to explore bird photography in future.

So recently, I have been thinking of upgrading the gear !

My important requirements are:

1) Good Battery life for cold weather
2) Weather sealed & robust body but lightweight as every gram matters while hiking.
3) Can invest only Rs 80,000 (including lens if I decide to switch to Canon/ sony)

Looking for great photography dslr with good dynamic range and dont expect great video capabilities.

For my requirements, a new Nikon D7500 would be the great option considering the compatibility of my current lenses. Cheapest and best suitable option for me, in my opinion.

OR I could sell off everything, divorse Nikon and switch to Sony (A6400) / Canon (EOS RP/ R10) which will be expensive including lens, not as weather sealed and poor battery life.

OR I could buy the crappy FTZ adapter along with a used Nikon Mirrorless under my budget (which kills the purpose of lightweight body)

What would you suggest considering my requirements and budget?

Any firsthand experience of the Nikon D7500 would be also appreciated.

Thanks in advance!