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Glossary > Telescope accessories > Special features > Homofocal

Glossary | Telescope accessories | Special features | Homofocal

Homofocal eyepieces in a series have the same focal position.

The advantage of a homofocal eyepiece series is that when changing the eyepiece, only fine adjustments are necessary in order to sharpen the image again. Instead of homofocal, the term parfocal is also commonly used.