Assuming you are using a Pentax DSLR - the focal length compared to a 35mm camera is 1.5x greater. So the 28mm is a 42mm - quite a nice angle of view IMO. Someday I hope to find a fast 28 prime to use as a normal lens...
Your 100mm macro is like a 150. The lenses don't magnify any more that on 35mm, but because the sensor is smaller the angle of view is narrower. It's like cropping a full framed 35 shot down. HTH - MCC --- ann sanfedele <[EMAIL PROTECTED]> wrote: > notice how I cleverly avoided mentioning my little > bastard camera... > > but seriously, folks - It took me a few beats too > long to realize that a > 28mm smc Pentax lens on a > 35 mm digital camera changes it to a less wide lens > -- and, I'm > guessing, the bit of space between the > back of the lens and the camera itself, due to the > thickness of the > adaptor also contributes to this. > > Soooo is there a chart somewhere or a formula that > says 28 becomes > 50(?) etc ??? > Does the difference/ proportion increase with the > physical length of the > lens? > > My 100mm macro seems like a 200 mm lens - so I'm > really in pig heaven.... > > It seems like the 28 mm still has the same depth of > field given any > given aperature when it is > on the KX or the digital camera.... > > ann the curious > > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link > directly above and follow the directions. > -------------------------- Mark Cassino Photography Kalamamazoo, MI www.markcassino.com Photo Books: www.lulu.com/cassino -------------------------- ____________________________________________________________________________________ Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
