William Optics 12.5mm SPL Eyepiece Reviews
Product Type: William Optics telescopes
Newest Review: ... and that's what makes the 12.5mm the best choice for consistant observation. William Optics have used 7 elements (lenses) ... more
... grouped into 4 in the SPL's design. Usually the addition of extra glass to an optical system can only serve to degrade image quality, however in the case of the SPL the glass is of an excellent quality and WO's supreme full multi coatings mean each lens performs as well as it possibly can.
In fact the extra lenses don't degrade the image at all and give the SPL a very comfortable eye relief. Eye relief is the distance one can hold ones head away from the optical lens whilst still being able to see the whole field ...more
Customer William Optics 12.5mm SPL Eyepiece Reviews (1)
by - written on 13/11/10 (Very useful, 48 readings)
Rating:
William optics are a superb manufacturer of astronomical equipment amongst which are the fantastic SPL range (standing for Super Planetary Long eye relief). Within the SPL range are the 3mm, the 6mm and the 12.5mm. Whilst the 3mm and 6mm offer very high power views the 12.5mm offers a more realistic magnification that ensures it will get used more often than it's higher powered cousins. Once you get over a certain power threshhold (dependant on the telescope you own) you are at the mercies of the Earth's own atmosphere. For the most part the 3 & 6mm SPLs will only get used on the rarest of occcasions when the atmosphere is at it's least turbulent and ... Read the complete review
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