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You are welcome to try out my Hutech #7887 0.85 FR/FF. It is fully adjustable for focal length by simply changing spacers so it is very stable. It works very well on 80ED, 100ED and even a 150mm F5 Achro. It illuminates a full frame very well without vignetting. Just PM me for details as you are only 17km away.
Bert
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