Mishka wrote: According to photodo.com the MTF ratings are Grade: 4.6 35mm/MF Tokina AT-X 90/2,5 macro Grade: 3.9 35mm/AF Pentax SMC-FA Makro 100/2,8 Grade: 4.3 35mm/AF Pentax SMC-F 100/2,8 macro Grade: 4 35mm/MF Vivitar 105/2,5 Macro Series 1 so, yes, pentax has a lens that is a tad better than Vivitar. and still behind Tokina.
Actually, the Tokina AT-X 90/2.5 is the same as the Vivitar 90/2.5 Macro (1:2). That Vivitar, as has been stated here before, boasted the highest resolution score in Popular Photography's tests for many years. I agree with Mishka entirely on this one. I have several quotes from Nikon users who say the Vivitar/Kiron 105 macro is as sharp as the Nikon; one sold his Nikon, seeing no point in keeping it. In a blind comparison, I doubt the Pentax would consistently be picked over the third-party macros as the winner. But then, I sold my SMC 28/2K and kept my Vivitar 28/1.9; sold my Pentax 50/1.4A and 50/1.2A and kept my Rikenon 50/2. For a photographer like me, who shoots primarily at ISO 400 and higher, ultimate sharpness isn't everything; I'll take "sharp enough" + great color (Vivitar 28/1.9) or fidelity (Rikenon, which happens to be sharper than the Pentaxes from f/2 to f/4.5). Paul Franklin Stregevsky - 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 .
