Hello, i've got a problem. Im kind of "pro" photographer (90% of my work time is taking and processing photos of some kind, 10% is tinkering in microscopes), doing mostly macro, micro and extreme tele shots (generally everything that include magnification). Very occasionally portraits and exterior/landscapes and extremely rarely interior shots (technically im not obliged to deliver those kind of shots). For micro i've got SEM, few optical microscopes. For macro i've got minolta 100 2.8 and Canon Mp-e65 + bunch of enlarging / custom lenses. For tele i've got tamron 150-600 6.3 and Minolta 70-210 4 . For portraits im using minolta 50 1.4 . For landscapes and interior shots only thing i've got is minolta 35-70 4 and (only E-mount lefover) samyang 8 2.8 . I got a7 and a6000 (a6000 is the workhorse for micro/macro/tele because of superior resolution - those kind of photos are supposed to be showing extreme detail, not sharpness). My employer is happy with all the results except interior shots (samyang) due to fish eye effect. After defishing, corners are really mushy and perspective distortion is extreme. To give you an idea, he said something like "curves are too extreme" about fished shot and "our manor house is looking like palace" after defishing. 35 is too tight and 8mm is too wide + distorted. My expertise in wide angle is almost non existant, so my question is what lens (A or E mount) can you suggest that is as wide as possible, but without that extreme perspective distortion (35 is fine, but too tight and 8 mm is definately too distorted). I just dont know what to look for. Price is 750 USD tops, lens can be pre-owned, as even 1 dollar above that would require weird procedures and month paperworks. Am i asking for impossible?