These days a Canon EOS 7D that is near permanently fixed on a cheap tripod (A 30€ Mantona, a Manfrotto Clone - I use a regualr Manfrotto outdoors and "one quick change mount to attach them all is nice) and equiped with "Barney" the EF 85/1.8 (old and with a tendency to purple fringing). A USB cable within a fixed "can be stepped on" cable channel connects it to the PC.
EOS 7D is totally oversized but last year you could get one with according to the Canon service protocol less than 10.000 pictures on the shutter and from the last production run for less than a third it was sold for in 2014. With a cheap entry 1300D running barely 50€ less AND only available with an 18-55DCIII I have no use for(1) - I was sold. And Barney is my "5 times / year" lens so I can perma-mount him on the camera.
Not to mention that if I go train stalking (This year I WILL get a picture of BR 01 series 001-150-2! This year I WILL!) I have a nice second body, one for the "short lense" - typically the 7D and one for the "main tele lens" - typically the 80D
Before that I used a EOS 60D+Tamron 28-75, an EOS 1100D + EF-S 18-55IS2 and before that an Canon A710 Powershot digital compact.
(1) Mind the difference. I said "I have no use for it, not that I can not use it". It's important - just ask Mr Marston/Allan Rickman