SVBONY SV188P Telescope Diagonal 1.25" 90°Mirror Diagonal 99% Reflectivity
A 1.25 inch, 90-degree dielectric mirror diagonal with a stated reflectivity of over 99%. A low-cost upgrade for the diagonal on small refractors and Cassegrains with a 1.25 inch focuser.
Price range: See on Amazon
What we liked
- + Dielectric coatings on a super-flat mirror reduce reflected light loss, with the surface stated at over 99% reflective
- + 1.25 inch nosepiece accepts standard 1.25 inch filters, and the body takes 1.25 inch eyepieces and Barlow lenses
- + Brass compression ring with thumbscrew holds the eyepiece firmly without scratching the barrel
Trade-offs
- - 1.25 inch format only, so it cannot take 2 inch wide-field eyepieces on a larger focuser
- - The view is upright but reversed left to right, as the listing notes, which is normal for a mirror diagonal
Prices change often, so check the current price and availability on Amazon.
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