<p id="docs-internal-guid-bd9f37e6-2d7c-4c67-950c-5c6eff7be898" dir="ltr">Henry,</p>
<p dir="ltr">I do feel that you are approaching this in the wrong way, you just cannot assume that a piece of equipment that has no marks on it can be correctly aligned/focussed, especially a chrome lens from the 1960s. All the Hasselblad modules are set to the same specs so that there should be no ‘individual tweaking’ necessary, the variation you are seeing is down to wear and tear and that is what a CLA is for, to correct all those errors. What I would strongly suggest is that you get one of the most fundamental pieces of camera workshop equipment that I frankly feel that you cannot do without. Namely an Autocollimator, you will be able to ACCURATELY set the lens focus without any doubt whatsoever at a flange to image plane distance of your choice, you can also use the same device to align parts of the camera assembly, you can even check that the film gate is in the right place.</p>
<p dir="ltr">The Hasselblad camera is basically a camera the same as any other and obeys all the same rules of engineering and optical design, the only difference is the modular design and all those components must agree to a common standard. That is the reason for all the special tools, and this is why I encouraged you to gain experience with simpler cameras with less variables, not suggesting in any way that you were unskilled or unable but because you would quickly gain the experience that would take you to the where you wanted to go. </p>
<p dir="ltr">This may be a poor analogy but if you were a musician and wanted to build your first instrument would you start with a grand piano?</p>