While it may appear that there is only a nominal difference between wide angle lenses, the angle of view is significantly different than for the same difference if focal lengths at the longer end. For instance there is a 13 mm difference between a 15 mm lens and a 28 mm lens, and the angle of view is 111 to 75 degrees respectively; a difference of 36 degrees. Yet the 27 mm difference (close to 2X) between a 50 mm and 77 mm lens offers only a 16 degree difference in the angle of view. That is 47 degrees for the 50 mm and 31 degrees for the 77 mm. So if you look at the difference in terms of angle of view, there is not such a large jump in the coverage.
And actually there are some lenses between 55 and 77. Nikon makes a nice 60 mm macro lens. My suggestion is get a good 28 - 70 f2.8.... a most useful range and my standard lens. Cheers, Mike. Knut Knut wrote: > Looking at the availlable prime lenses I noticed that these are > extremely closely spaced from ultra wide to 55mm, but then there is a > jump, for most producers (Canon, Nikon) straight to 85mm, Pentax to 77mm: > > Availlable for PK: > 15mm/17mm/20mm/24mm/28mm/31mm/35mm/43mm/50mm/55mm > > Then they are closely spaced again: > 77mm/85mm/90mm/100mm/105mm/120mm/135mm > > > Why are there no primes in the range between 55 and 77mm? > > I actually more than once missed a lens in the close tele range: > Something like 1.8/60 or 1.8/65 > > What do others feel about this? > Does anyone know if there are special problems constructing such lenses? > > Knut > > _________________________________________________________________ > Downloaden Sie MSN Explorer kostenlos unter > http://explorer.msn.de/intl.asp > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . > > > . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
