Originally posted by lesmore49 I have to disagree. Strongly.
I have two Yashica TLR's and a Mamiya Pro 220 F with an 80, 65 and 180 and have a lot of experience with these cameras, plus the Pentax 6 X 7. I did a fair amount of medium format work back in the '80's and '90's.
I don't know how much experience you have but that is definitely not the case that the Yashica TLR has better lens quality than Mamiya TLR lenses.
Many pro photographers used the Mamiya TLR and Mamiya-Sekor TLR lenses to earn their daily crust and that is not the case with the Yashica TLR very much.
Mamiya lens is good, no doubt about it, but picture lacked "glow" say if you look at subject's corner.
Okay, comparing to Yashica Mat-124 maybe the difference is minimal, there is a difference with Rolleiflex and noticeable with Autocord, even the Kiev 80mm Arax have a more beautiful image even though the 220's 80mm isn't that bad. (But I don't want to deal with the problems with a Kiev)
The image quality is certainly good enough for pro, and form factor and reliability make it attractive, but comparing side by side there is a bit of difference in quality.
If I were to take landscape only with wide angle, the Mamiya would be my choice over the others.