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Having high QE means more of the light that enters your telescope and reaches the sensor is actually used
4 Objective lens Quintuplet air-spaced APO (including two ED glasses) Image circle 44mm Maximum accessory connection (with the focuser fully retreated)： Imaging mode 76mm（from the base of M48×0
Manual aperture control between f/4 and f/22 for landscape photography
It is designed to hold the 2" (M48) filter drawer securely in place while allowing smooth
Dimensions and Weight: 630 x 360 x 200 mm
5× Premium Barlow Lens | Dark Clear Skies 2mm spacer Having high QE means more5 Premium Barlow Lens The Dark Clear Skies 5 Premium Barlow Lens is designed for observers seeking very high magnification for detailed lunar and planetary observation. By effectively increasing your telescopes focal length by a factor of five, this Barlow allows existing eyepieces to reach extreme magnifications while maintaining image quality. Ideal for observing fine detail on the Moon, Jupiter, Saturn, and Mars, this premium Barlow is best used
