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 Possible issues with Zeiss 35mm f1.4ZM or need to shim Hawk's Factory Helicoid | |
My new Zeiss 35mm f1.4 Distagon ZM was just delivered late this past Friday from the Leica Shop in Austia. I have begun to run some initial test on the lens which is being used on my just modified A7r by Kolar Vision with the thin sensor stack. I am mounting the lens on my Hawk\'s Factory Helicoid V5. I know that I need to run tests closer to infinity and to work on the proper color and WB with the new sensor mod. But, I have noticed for some closer work that the right corners in particular are not holding focus compared to the center and to the left corners. So I am not sure if this is an issue requiring shimming my Helicoid or if there is a problem with the lens (is it decenterd). I hope it is not the lens and this can be easily resolved; I don\'t want to have to exchange the lens in Austria.
So I have run a series of tests focusing on the large island in the center of my Kitchen. I focused on the screw of the outlet or the upper corners of the granite counter top at f1.4 and f5.6. The counter top extends beyond the flat surface of the Island \"wood\" finish. After the first tests and subsequent that are not posted, I moved the tripod and the camera again which you will see below and in the subsequent posts. I know that this is not a perfect test by any means, but it will give me an idea. I tried to position and to level and measure the distance from the tripod mounted camera (on the left and the right) from the flat surface of the Island.
The images of the set ups for the 6 set ups are posted in this and the subsequent post. The detailed 100% images are posted in the posts that follow the first 2 posts.
All Photos presented are as they were imported/exported from LR6 without any adjustments but the default settings. Sized in PS CS6 and posted as JPEG files and close shots at 100%.
I may have been off on some of the focusing. But, I hope that we can determine and resolve the issue. It is going to take me a little time to post all of the photos, so bear with me.
Rich
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