Good for the price
Got the 4mm and 23mm. both EP offers great TFoV in small F4 newton. The 23mm is really sharp, less the 4mm. Contrast is not at the level of the plossl, SP as both are very brights, may be too much on fast scopes. Not suitable for short Focal ratio. But for cheap, one can have a wide TFoV eyepiece (23mm). So good enough for the price paid.
1.62° aspheric field of view
2.SVBONY 62°Aspheric 4mm/10mm/23mm eyepiece, suitable for 1.25 inch /31.7mm astronomical telescope
3.Fully coated glasses for excellent image contrast and light transmission
4.The eyepiece of high-definition, it can increase the magnification of the telescope combination
5.Sharp optimal performance with low chromatic aberration
6.Eyepiece interface recess portion can prevent the loss
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