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Subject: Re: vote by xxx.xxx.4.16 By: Anonymous (xxx.xxx.97.34) Date: 10/01/2005 08:12:09 pm PST >I would like to give the Pentax a high rating, but in my 6" Apos there was considerable curvature of field. Had I not looked at the moon my rating might have been higher, but when I focused at the center of the field of view the edges were out of focus, and when I focused at the edge the center was not sharp. A very frustrating experience for such an expensive eyepiece. I had seen Saturn through the 82" at McDonald observatory through a friend's previous generation Pentax - it was spectacular - and I was expecting an even better eyepiece in the new generation. Using it for terrestial viewing during the day I never noticed this effect. ----------------------------------------------------------- I also tested this EP out on my 12" f/5 reflector and the field curvature was very prominent 80% of the way out. Still, the contrast is amazing and I saw a wealth of detail on Mars this morning when it was 17" large. Galaxies also have better contrast if you dont mind field curvature when looking in this particular EP. I would rate it a 10/10 for contrast and 7/10 for flatness from edge to edge. Subject: Re: vote by darkskyfarm By: darkskyfarm Date: 04/17/2006 08:38:31 am PST >Excellent eyepiece series. Very high contrast and throughput with nice sharp images. Construction quality top-notch and the long er will spoil you forever. The 10mm is especially nice in our 16 inch f/4.6. Page 1 of 1 |
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