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Originally Posted by Dennis
Hi Gary
I have the 21mm and there is a very noticeable, strong yellow colour band around the peripheral field of view whenever I use it. Whether in my C9.25, Vixen ED102 or WO 80mm. I would be interested to hear of your experience with the 21mm.
Thanks
Dennis
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Dennis,
I thought I had jaundice or something when I looked through my 21mm Hyperion which was only purchased recently. I used it on my 10" LX200 initially to look at the moon late one afternoon and the strong yellow fringing was quite noticeable around the peripheral field as well. My daughter in law said the yellow edge looked really good! The effect was still noticeable on quarter moon in the evening. I also tried it out on my SW ED80 Pro the next day and it was the same. The other Hyperions don't appear to suffer from this problem. It is annoying, however it seems to be only present when viewing in daylight or looking at the moon. The eyepiece performed very well when viewing star fields showing quite clear pinpoints near to the edge of the field and know yellow reflection was evident.
When I bought the set of six Hyperions, I ended up with two 13mm EP's. One of the 13mm EP's was put into the 8mm box, very annoying as as I had to send it back by post and now have to wait who knows how long to get the right one. What's even more annoying is that a lot of dealers don't care that you have to pay for postage and rarely do they offer a refund when it is usually their fault.
Cheers, Steve