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Wrap one around the telescope tube near the optics and secure it there with its integrated Velcro/elastic strap. A gentle heat is then transferred to the optics until the temperature is slightly warmer than the dew point. Please check the circumference of your optic first to ensure this will provide a good fit.
Desk Edition: This edition is printed on heavy paper with a cardboard cover. It is spiral bound and can be flipped over. The legend is printed on the inner sleeve of the cover. This edition will last for a lifetime of observing if handled with minimum care.
Fix a turned down edge, stop mirror clips from affecting your imaging etc.. by installing a TDE Ring / Mirror Clip Mask. Easy to understand instructions, illustrated.
