If you are wanting a telephoto (8 to 10 X), the words smaller/lighter do not seem to fit.
But my guess is, your film camera is SLR. Which makes most cameras seem smaller and lighter weight.
Here is a list of some of the popular long lens cameras:
Konica Minolta Z2
The Konica Minolta Z2 is likely to be the most rugged and it is good for close-ups and macro work.
First, I know very little about digitals. I've been using 35mm for color slides the last 30 years. Thinking of changing over and scanning my 1000's of slides. Question: What camera(s) would be recommended for my use which is wildlife/scenic photos. Use almost entirely outdoors on long/short backpacking trips. The smaller/lighter the better, able to take josling around and some exposure to moisture. Need a telephoto for wildlife shots and closeups of wildflowers, etc. Responses appreciated!