I have the original version of the Pentax 645. It gets more use than any of my other cameras. Try the 150mm lens for portraits. It is about like a 100mm on a 35mm. The 75 mm lens is the normal lens, and the 45 mm is the wide angle, about like a 28 mm on a 35. The 645 is a quite a bit different from the K1000, but you should have no problem adjusting. If you don't have one, try to get a user's manual - it has a lot of good stuff in it. One thing you have to get used to is loading the camera. It is slower and much less obvious than a 35. Be sure the magazine is fully seated and the lock is fully set before you start taking pictures. It is possible for the magazine to be partially engaged, which doesn't work. The exposure meter on the early 645s is quite primitive but still functional. You need to be aware of special lighting situations that will fool the meter and then use the exposure compensation feature (or manual mode) to handle the situation. |