I always wanted a SP, simply could not afford one. One of the press photographers at a paper I freelanced for when in college had a F and SP, the SP had the motor drive, I have vague memory that the battery case was clipped on to his belt. When I bought my Canon 7S, in 1972 or so the Sps were still very expensive and had become collectable. You can use a clip on meter or just shoot using Sunny 16. The Nikon RF lens collection was quite extensive, I think there was reflex housing for it with some very long lens, these are also high end collectable, I think the range was like 24 or 20mm to 1000mm. If I were to spend the money for a S2 or SP I would want the lens range for the for the built in viewfinders, 28 to 135.