Originally posted by acoufap This lens looks very promising! I like the design and what was said about it in the video.
Hope weight will be less then 400g, that there will be adapter solutions to use GND square filter sets and price is not as high as of the FA31 Ltd. in Europe (1.500,- ).
I wouldn't expect the HD Pentax-D FA 21mm ED Limited DC WR to weigh less than 400g.
The smc Pentax-FA★ 24mm f/2 AL [IF] has a similar diameter, it is a bit shorter (even when taking into account the integrated lens hood of the D FA 21mm Limited), its outer shell is made of plastics instead of machined aluminium and yet, it weighs 405g. The D FA 21mm Limited should be heavier.
The D FA 21mm Limited is 75% bigger than the smc Pentax-FA 31mm f/1.8 AF ED Limited, which weighs 345g. Applying the same ratio to its weight would lead to
600g for the D FA 21mm Limited.
Being 75% bigger than the FA 31mm f/1.8 Limited it definitely won't be cheaper (there is a good correlation between weight and price among lenses of the same category).