I'm trying to find one to replace my heavy lost 10-20mm sigma. what i want is only a prime and very narrow range. perhaps about 12-13mm, with a crop factor, that will be 18-19mm at 35mm equivalents. if i can shave the weight, i can shave my versatility.
looking at tokina 11-16mm, and nikkor 14mm f/2.8. these are all monsters in weight and size. nothing is below 300gm. and becos i do want to use filter, those fisheye are out, and really leave me with nothing to choose from.
alternatively use my non DSLR to shoot like the way i do for DSLR... but even for my m4/3, with a crop factor of 2x, i can do with a 9 to 10mm lens, but the current shortest focal length non fisheye is 14mm. that will make it a 28mm at 35mm equivalents, which is too far off.
am i missing some rarer field or older lens to choose from. or technically impossible stuff for either DSLR and m4/3 formats, so i cannot be a light weight lens for my desired wide angle range for they simply dun exist.