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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3370721" data-attributes="member: 92780">Chuck, those bigger EP numbers sound fine in theory, but I would carefully read all the reports and reviews of the x54mm HT's here on BF to get the real drum on their optical quality.  The 10x50 SV is very special and a real WOW ..... however while it's 5mm EP is great during daytime, for my young eyes it will run out of EP at sunset.  I have viewed all the A-K prism x56mm SLC's, particularly the 10x hoping it would be the holy grail I was after.  I was disappointed with the daytime viewing in comparison with the 10x50 SV ...... I would like to grill these more at twilight to see if they can offer any benefits .....As it was, the only benefit the hefty x56mm SLC's offer is to make the x50mm SV's seem 'light' in comparison when you pick them up straight after!  3<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />Chosun  :gh:</blockquote>