Premium flat field eyepieces offer corrected field curvature; this correction lets you use the entire field of view; you will observe an image with superior sharpness - not just in the centre but right out to the outer edge
Multi-coating and crystal-clear images: large eye lenses will impress at very first glance; crystal-clear images see will impress even more; premium of 5-6 lens elements and high light transmission giveimage of high colour purity and excellent contrast
The eyepieces have solid and infinitely adjustable eyecups making it easy to choose most comfortable viewing distance; ideal for long intensive observing sessions; various models have focal lengths of 8 16 and 19mm; also ideal for spectacle wearers
85mm focal length; reduction factor of about 0.5X; depending on spacing; 0.5x focal reducer effectively halves the focal length of a telescope; enabling lower magnification; a wider field of view; and shorter exposure times for astrophotography
2 lenses for better correction: cemented together and coated; black anodized aluminum housing; mounting threads: 1.25 inch filter thread means 28.5x0.75MM on both sides; can connect to telescope accessories with standard 1.25 inch threads