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These are 5 element Plossls and I believe they have slightly more eye relief than the 4 element ones; e.g. my 5 element 15mm Antares Elite Plossls have at least 1-2mm more eye relief than my 4 element 15mm Televue Plossl. But the eye relief is still proportional to the focal length for either design, and at 7.5mm, I would expect it to be fairly short.
Ving, can you comment on eye relief with your 7.5mm Ultima?
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