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Model: WOerectPrism1.25-90Part Number: D-EP90-125Brand: William Optics
William Optics 90° Erecting Prism with helical focuser for fine adjustment.
Turns upside-down views right-side-up and gives correct left-to-right orientation.
Works with 1.25" eyepieces and telescopes with 1.25" eyepiece holders.
This is a very good erecting prism. My intention was to use it in my Baader Varifinder, but it is so much more than a simple erecting prism, making it an ideal match for a high quality refractor for terrestrial viewing. Recommended!
Very useful piece of well-engineered kit. Optically excellent and the addition of the helical focuser to my telescope has made a huge improvement. Highly recommended.
OK not everyone wants an erecting prism but I did! The build quality of this 90° prism is very solid and the optics are good with no perceivable aberrations to my ageing eyes. Much better than the 45° prism that came with my scope. Also the inbuilt helical focuser is a bonus and acts as a fine focus once the scope is focused and does not vibrate the set up. I now don't get back ache with this 90° diagonal in place - highly recommended for quality with ecconomical cost.
Wonderfully built and with smooth action. A lovely alternative solution if you have a stock rack and pinion focuser. Especially so if you want to keep the original look of a classic refractor.It gives very fine focussing equivalent to dual speed. The prism provides correct views with minimal effect on observing. We compared it with a WO dielectric on the double star Wasat and found it hard to find any difference in views.Will definately recommend this as value for money and an essential bit of kit.
First Light Optics LtdUnit 7 Budlake UnitsBudlake RoadMarsh Barton Trading EstateExeter, DevonEX2 8PY
Company No. 5892293VAT No. 907 2895 01
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