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5mm size is also great for detailed examinations of the structures within deep sky objects like nebulae
portable design ideal for both visual astronomy and astrophotography
Argon cools slower thereby buffering the effects of rapid temperature changes of the optics
or if you are using the flashlight
The National Geographic Telescope/Microscope Discovery Set is an ideal choice for young scientists looking to explore everything from the soil to the stars
68° Series 24mm Waterproof Eyepiece Aperture_2. 100mm - 127mm 5mm size is also greatUsing advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 68 Series Argon Purged Waterproof extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The visual effect of these eyepieces with their long eye relief and their 68 apparent field is truly a full immersion
