..So good to read sound, serious contribution, not polluted with devaluate people (and upon speculations).. Sorry I granted myself to say that.../. There are good arguments to have primes at the 70mm focal length you mention, the range from 50 to 85mm is thinly covered ./.."
I have and liked very much the rendering of the Sigma Macro 70mm (if You desire me to provide specific photos..) however the absence of FTM ability (as it is called by Canon : Full Time Manual focusing-along-with AF) and its MF-thread quality rather contrary to what is generally likable handling of it. But I had gotten to like it on 5D III I had. Now on A7R-II I arbitrarily just use the good EF24-70 II for it's better handling. It probable it still deserves I should use it though its sharpness (it was over my old 24-105 and comparable EF 1.2 85mm) could probably not be the argument compared to the 85gm..and f1.8 55 (and will never be "kind of always on" as I imagine an ..70 /65 mm EYE-AF capable lens could be for me many times with f1.2 or 1.4).../. The Sigma 70mm 2.8 macro is a very good lens, big and aged now, I may still end with that one. The Leitz 70mm is an M mount rangefinder lens. Little else exists in 70mm ./.."
Regarding 4..mm pancakes unfortunately they are not 1.2 or 1.4 - (it's maybe "impossible" with that formula?) -small size would have been the bonus. Not sure about possible near-focus drawbacks. True; the Zony f1.4 35mm scares me of for it's size (and inconstant quality-check - and I just don't feel ready to concede yet for such spending)(I have the just as big ZE 1.4 manual 35mm but would gladly replace with AF capable 43 f1.4, not for street (...) but for people and some object-photography)../ Whether 70mm is an odd focal length is subjective. I see many APS size users praise their adapted 50mm lenses, the angle of view corresponds with a 75mm lens on FF. 40mm pancakes are adapted on APS for their size, I do not see complaints about the resulting 60mm perspective ./.."
../. Popular usually means static; supply and demand are chained to one another for no other reason than tradition. Let us hype the 65 mm focal length to break that chain ./.."
I join You on that : 65 instead of 70 i'd perfectly adopt and favor too. It's less than 65 and above 70 that I would start again complaining..
