A Nikon D610 and (separately) an AF-S 24-85mm 3.5-4.5 lens. The D610 was someone's unwanted gift; UK model, unregistered with Nikon and never used, for only 60% of the Amazon price
. The lens was also cheap at £180 - it's the non-VR version that was only made for a few years but is optically identical to the current one, which is spot on except for distortion (corrected in-camera anyway). It's a bulky plastic thing that's fairly unpleasant to handle and I only really got it for holidays where I don't want to take a bag of lenses and SO might want to use an AF lens.
The D610 looks as if it is going to do its job as a "digital back" very well. The finder image is a bit small compared to the F3 (I have the original DE-2 prism, not the F3HP one which is probably more like the D610) but the focus confirmation dot always agrees with my eye, thank goodness*, and the in-built dioptric correction is just right turned to the maximum (+1.0D, apparently, which is more or less +2.0D including the rest of the prism optics; my glasses are +1.75D). Programme in the manual AIS lenses for focal length and maximum aperture, and away you go in M or A mode; it works just the same as a film SLR except that you don't have to wind it. The mirror is very well damped compared to the F3/FM2 and there isn't much more vibration than with a Leica M3. On the other hand, DSLRs are, as Ken Rockwell says, big plastic turds to look at and to handle. I won't be getting rid of the film bodies for b/w, which are far nicer to use.
One question: I can't get Auto ISO to do quite what I want; I have tried increasing the minimum shutter speed slider control to the maximum but it will still sometimes set 1/30 with a 50mm lens indoors when there is still plenty of extra ISO speed available. Unless there is no other way to get the shot, I try and stick to the reciprocal of TWICE the focal length when hand-holding (OK, I could do 1/8th with an M3, but that was a different beast). Am I missing a trick?
*it's interesting to see just how hard it is to get the green dot to come up with the AIS 50/1.4 or 300/4.5 and their very shallow DOF at full aperture - wiith the AIS 24/2.8 it is happy with infinity for anything more than about 15 metres away because it just can't tell the difference. Same as your eyes, really.
