On 10/02/2010, jtainter <jtain...@mindspring.com> wrote: > Can anyone calculate how large (diameter) the front element of the DA* 20 F2 > will be? This lens will have to be larger than the FA 20 F2.8. Sigma's 20 > F1.8 takes, IIRC, an 82 mm filter. So this will probably take a 77 mm. filter.
I don't think that the front element for the cropped sensor 20mm lens would need to be nearly as large as the FF 20mm lenses but still that lens pictured does look kind of small, it would be a 58mm filter at most. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
