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Heaven's Boulevard astronomical sky image for any location, date, and time. Personalize with a picture and message. Great gift for birthdays, anniversaries, or any special event. Learn more (Link leaves KnowledgeDoor website)

Characteristic

diopter

Notes

Other Name

dioptre

Metric (SI) Equivalent

1 / meter

This equivalent is exact.

Metric (SI) Dimensions

length-1

Quantity

Refractive Power

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