Originally posted by baro-nite You do want to be careful trying this, but it's designed to be changed by the user, i.e., no special knowledge or equipment required. The main thing is not dropping or scratching the screen. The instructions on focusingscreen.com are good enough to get you through it.
I'm not saying you should change yours, however. I happen to like the S-type screen but not everyone does. It gets darker than the stock screen with especially slow lenses, and some have claimed metering inaccuracy.
Diopter is unlikely to be the issue. If the diopter is off, the entire viewfinder will look out of focus.
Here's how I tested focusing screen alignment. Camera on tripod. Target is a printed page, camera at an angle to it so only a few lines are in focus. Looking through the VF, note which printed lines are the start, middle, and end of the in-focus area. Make an exposure and then compare. I suggest an aperture of f/3.5 or so, so that the VF image has a similar DOF to the output. Although you should probably also make an exposure wide open, to make sure focus shift isn't an issue (i.e., focus distance changing as lens is stopped down).
Hello...
Sorry for being long to answer...
i made many try and finally i realized :
1) Diaopter was totally OK --> problem did not come from there...
2) Many photos i made inside were really different on computer screen in comparison to what i saw with eye in the camera (K5)
3) Today i made a try : i realized that focus was always in front of the zone that seemed to be OK on my eye --> so i used the front-back focus option in the menu of the K5 --> i tried for example at +5 --> all photo were much better.
--> i think i should use an appropriate grid to determinate what is the best "front/back focus number" in the menu of the K5....when focus is ok, photos are really fabulous with this 50mm f1,4 (i mostly use it inside home at f2)
Thank for you help !
Lionel
---------- Post added 12-25-14 at 07:20 PM ----------
Originally posted by baro-nite You do want to be careful trying this, but it's designed to be changed by the user, i.e., no special knowledge or equipment required. The main thing is not dropping or scratching the screen. The instructions on focusingscreen.com are good enough to get you through it.
I'm not saying you should change yours, however. I happen to like the S-type screen but not everyone does. It gets darker than the stock screen with especially slow lenses, and some have claimed metering inaccuracy.
Diopter is unlikely to be the issue. If the diopter is off, the entire viewfinder will look out of focus.
Here's how I tested focusing screen alignment. Camera on tripod. Target is a printed page, camera at an angle to it so only a few lines are in focus. Looking through the VF, note which printed lines are the start, middle, and end of the in-focus area. Make an exposure and then compare. I suggest an aperture of f/3.5 or so, so that the VF image has a similar DOF to the output. Although you should probably also make an exposure wide open, to make sure focus shift isn't an issue (i.e., focus distance changing as lens is stopped down).
thank you for your help...
i am thinking now about changing the focusingscreen but dont know which one to take...
moreover : when i will use another lens : should i change focusing screen for each différent lens ???
Lionel