Noch als Ergänzung - gefunden auf "Alex Library", einer älteren Seite, die ich mir mal kopiert habe.
Gruß
Peter
100mm Macro
f2.8
M100/2.8: a lovely lens for portraits in terms of weight, size, and price.
A100/2.8 is superb. The lens is an "absolute gem", it is tack sharp at any aperture, and at any focusing distance.
Note: all film resolution tests on this site were done using this lens. “This lens is WAY beyond outstanding”, said William R.
FA100/2.8 macro is also a "fantastic lens". It has a wonderful bokeh. It also has a focus limiter switch that changes the dampening so that it feels much more like a MF lens. The focus movement slows down.
Comparison of A, F, and FA versions by the "certain" magazine (quality/price/love factor)
SMC A 100/2.8 macro VG / VG / EX
SMC F 100/2.8 macro VG / G / G
SMC FA 100/2.8 macro VG / VG / VG
f4
100/4 bellows macro (no focus helicoid) is very sharp, flat field lens. (All Bellows- and SMC Takumar- or Pentax-M/A 100/4 have been optically equal, except for the coatings and, in the case of the Bellows lenses, the internal focusing helicoid. All these lenses feature very fine optics.)
M100/4 Dental Macro lens goes to 1:2, and differs from the non-dental version in the yellow and red marks that show the magnification ratio when used with the yellow and red closeup lenses (filters). Both dental and non-dental 100/4 Macro lenses are reputed to be of high quality The differences can be seen here:
www.phred.org/pentax/k.
The new 100/3.5 macro is a Cosina design, sold by Pentax under their name. This lens is very good (said to be almost equal to the original Takumar / Pentax 100/4 as far as the optical qualities are concerned). From the mechanical point of view, the new macro lens is a typical AF lens with a helicoid that runs a bit too loosely for critical manual focusing. Cheaper construction and slower speed result in lower price when compared to FA100/2.8
If you are thinking whether to purchase a 50mm Macro or a 100mm one, think about the extra working distance that the longer lens will provide you with. Another thing to consider is the fact that autofocus is less than necessary for macro work, the subjects tend to be fairly static, and thus you might save by finding an older MF Macro. Also look at some of the excellent lenses by Kiron and Vivitar .
Nee, mit Joguhrtbecher kann ich gerade mal nix anfangen, bitte um aufklärung
