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Sharpest Zeiss G2 Lens

Ming Ting,

Which G body are you using? The G2 autofocus system is apparently more accurate than the G1. Also, some cameras have software problems that interfere with proper focusing with the 90. Do some careful film plane to subject testing with a tape measure against the camera's digital readout to ensure it's focusing correctly. If not, you'll have to get the body serviced by Kyocera. (This is a well-documented problem.)

--Rick
 
> Rick is this your point of question?

2. Do an exposure series at each <font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">• will be a maximum for each <font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">•<font color="ff0000">• you can resolve every target your too close. ----------- Best if you could do an exposure series with the f/# unchanged. Ideally the light source should be modified to keep the shutter speed constant and vibration in the camera the same. But you are right, doing it that way begins to sound like work. So I suggest you use your shutter and do plus / minus 3 stops in half stop increments. After processing you will see resolution increase to a maximum then decrease. Like a unside down parabola. Don't know if the peak will be at correct exposure or a little over or a little under. Depends on a lot of things. Depth of field will be greatest at f/16 but maximum sharpness should be with f/8. But I am guessing f/8 w/o data. So with each f/# there will ba a maximum but the width of parabola will be different.

"If you can resolve every target you're too close" means you need to push the test beyond what the system can resolve. There must be some targets you can't read. They are too small. If you can read them all move the target away ...make them smaller.

Hope that helps.

Dave
 
I own a G2 and all of the lenses except the 16mm and the 35-70mm zoom. All of them are exceptional, but I have always felt that the 28mm is the best. Images that I get from it seem to be crisper than those from any of the others. Oddly, it is the lens that I use the least, simply because the 28mm focal length is too wide for general use, IMO.

I have used the 35mm extensively. For awhile, I was bothered by the bokeh at f2-2.8, but no longer. It beats just about any other 35mm on the planet.
 
I myself have noticed taht my G2, 45mm lens and Kodak T400CN make a very sharp combination.
 
I have G1 not G2 with CZ 45mm. I got remarkably sharp result using T400CN, and I am now trying Ilford HP5+ and Delta. I've tried also colour slides (Kodachrome), the sharpness and colour are extremely beautiful for available light photography.

Trisnadi
 
I have all the G lens except the zoom. 45mm is the sharpest. 20mm is the best of its class. 28/90mm is the third place of this competition. When you are talking 16mm, it is a good lens with minimal distortion. However, the resolution is not the best among the other G lenses.

Leo
 
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