FTb wrote in post #18404566
Without question, 17mm TS-E on full size sensor.
Real estate is really about having the skill and experience to produce the best work in the shortest time. When I enter a house, I have one Rovelight on a stand, and one camera on a tripod. My camera is tethered to a tablet that is mounted on the same tripod. I use one WA zoom 95% of the time. I have belt pouches that hold an additional lens (rarely used), a hand held speedlight, spare batteries for everything, and a few small extras. Because I have limited equipment to move, I can move quickly from room to room. I can finish a 2500 sq ft house - providing the client about 40-50 images - in a little over 1 hour. I also rely heavily on PP since I do no HDR and most images are hand blended. Total time per house - including post - is 4-5 hours. My goal is $50 per hour. I would charge more except I am on the high end in my area and frequently loose work to the run and gun guys who produce very cheap work. I have clients who appreciate how much good work increases their sales and get plenty of work, but, if I charged more or took more time for which they had to pay, I would would lose work.
That said, in my experience a fixed focal length lens in real estate work is a liability. It either slows you down because it requires MUCH more equipment and frequent lens changes or it restricts framing to a single point of view. In real estate work, time is money. You have to work fast to make a profit. And most of the virtue of a TS lens can be accomplished by accurate framing and careful PP.
Other architectural work is not so critical with regard to time. Clients are willing to pay for the extra time to produce good work so the exceptional quality of the 17mm TS will really pay off.
This is, of course my opinion based on my location and experience. Others may have entirely different conditions which make other choices more viable.