I recently acquired an old vintage Nikkor 300mm ED F4.5 Non-IF camera lens. This is the non internal focusing lens circa 1977-1979. That puts this lens and design over 40 years old. Less than 1,000 of these were ever made. This is a very rare lens that I was lucky enough to pickup for a cheap price on an auction site.
Marco1968 inspired me to pick up this lens from his post here.
Here is the optical layout of the lens:
As you can see it is essentially a quadruplet 67mm aperture with a cemented doublet field corrector. A total of six elements are used in this optical design.
After reading his post and checking out his images and other reviews online, I was convinced enough to pick one up and test one out when I came across one. It arrived the other day and I did some simple test images in my light polluted backyard. First here is the vignetting profile across a full frame DSLR (Canon 5D Mark II).
Here is a 3x3 sample of edges and corners across the frame @ F4.5. I also noticed very little CA in the star field. The focus was not perfect as I did not use a Bahtinov mask or other focusing aid. The stars in the left corner are showing elongation but I believe this to be the weight of the camera hanging off the lens. I am going to 3D print a support bracket to help with this. The other corners and edges are very good IMO for a full frame DSLR.
I was impressed with my test shots and really wondered what kind of ED glass was used in this design. I researched Nikon Lens Patents and found the US Patent # on the Photons to Photos website . The optical prescription was found in US Patent # 4,154,508 (Standard Lens 2):
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