Hi luben, It was useful indeed. I had been toying with the idea of getting the Flektogon for a period of time... but then I later went with the Bessa L + 21/4 Color-Skopar combination.
Great picture of the wrinkled waves, btw. YW On 11/14/05, luben karavelov <[EMAIL PROTECTED]> wrote: > Hello, > > I have promissed to share my impressions of the Tamron SP 17/3.5 lens > that I have just aquired. I compare it with Carl Zeiss Jena Flektogon > 20/2.8 because I use it and I have not a comparable pentax lens (18mm ot > 20mm). > > So, first the feeling of handling it. It is a metal barrel that has a > solid feeling. The focusing ring is a little bit narrow but it is not > such a pain like the one of Mir-20 lens I have put my hands on > yesterday. I traded the nikon mount Adaptall adapter with which the lens > have came for a Pentax K adapter. I had any problem with it. It focuses > just to infinity not like the Flektogon that with M42 to K mount adapter > focuses beyond infinity. On the other hand, the focusing run ot the > Tamron lens is too short - it is 1/4 of the full turnover versus 3/4 of > the Flektogon lens. > > The front lens is 67mm in diameter but there is no screw mount for > putting filter in front of it, Flektogon has and I have recently got a > cokin filters holder that do not cause vignetting with it. > > The pictures that I will discuss could be found here: > > http://flickr.com/photos/karavelov/sets/1360481/ > > Abberations: > > I could not say anything about CA because I shoot B&W. > > There is not noticeable barrel distortion in either of the lens. > Howerver there is some coma distortion that I could notice with both > lens that is stronger with the Tamron. > > I have not checked yet the flare resistance of the Tamrom lens, but the > images seems not so contrasty as the Fleftogon ones. > > Light falloff - it is realy a problem of tamron lens. I could see some > vignetting even on pictures that have been taken at f8 (see the > pictures). Flektogon shines here. > > Resolution: > Both lens have poor resolution at the edges but my feeling is that > Flektogon is more sharp. At the center I think that also Flektogon is > sharper. (see the crops - I do not know if am not hitting the grain of > the film with the Tamron lens here). The flektogon has also better edge > definiton that Tamron 17mm lens. > > Nevertheless 17mm makes really difference of the field of view. With all > its limitations it may be the choice for some situations: > > http://flickr.com/photos/karavelov/62990960/ > > Best regards & I hope it was useful for you > > luben > > > > > > > > -- > "Computers are useless. They can only give answers." - Pablo Picasso > >
