Pentax SMCP-FA 645 400mm f/5.6 ED (IF)

A great lens with superb optical and mechanical quality. Meets quaility wise the other lenses for P645N. Very light weight and small. Ideal for travel.

weight and size

33-55, 45-85, 80-160, 5,6/300

fast and friendly

Most Pentax SMC lens provide great colour reproduction, but the colour reproduction of this lens is not as good as other FA lens and the sharpness of lens is only average especially at the corners. Since Pentax 645n don't have mirror lock up functions, it must be careful with the vibrations with long exposure. However, its price and weight is the best compared with all medium format tele lens.

Light in weight compared with other medium format tele lens. Also, reasonable price, around US$1500

still bulky size.
The optical quality is not as good as other 645 FA lens

FA 45/2.8, 75/2.8, 200/4, 120/4.
6008 EL 50/4, 80/2.8.
Mamiya 645 MF, 150/3.5, 80/1.9, 45/2.8

No experience