07-12-2017, 10:10 AM
Quote:How about f5.6?
https://voigtlaender.de/12-mm--f-5%2c6-ultra-wide-heliar-e.html
Wide enough to provide FOV for 15mm uncorrected, all you need is to apply "uncorrection" in PS/LR/DXO. Only 283 grams.
Still way too big ...
http://4.bp.blogspot.com/-8zH03vIYPS8/VE...mF11_0.jpg
... and sort of lacking FoV.