{"id":1845,"date":"2022-11-09T19:26:10","date_gmt":"2022-11-09T10:26:10","guid":{"rendered":"https:\/\/products.entaniya.co.jp\/en\/?p=1845"},"modified":"2022-11-09T19:26:11","modified_gmt":"2022-11-09T10:26:11","slug":"about-hal-220-series-zoom-spacer-ring","status":"publish","type":"post","link":"https:\/\/products.entaniya.co.jp\/en\/about-hal-220-series-zoom-spacer-ring\/","title":{"rendered":"About HAL 220 series zoom spacer ring"},"content":{"rendered":"\n
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The Entaniya Fisheye HAL 220 series (HAL 220 PL \/ HAL 220 LF) can change the focal length. To change the focal length, use the zoom spacer ring.<\/p>\n\n\n\n

The zoom spacer ring is not a common lens, so this article explains how the zoom spacer ring should be used.<\/p>\n\n\n\n

Spacer to change focal length<\/h2>\n\n\n\n

The zoom spacer ring is a spacer that changes the focal length of the lens.<\/p>\n\n\n\n

Each zoom spacer ring has a different thickness and can be changed to any focal length by using the spacer designated for each focal length.<\/p>\n\n\n\n

For HAL 220 PL, the focal length can be changed in steps from 6.14 mm to 8 mm,
for HAL 220 LF, the focal length can be changed in steps from 9 mm to 12.6 mm<\/p>\n\n\n\n

The size of the image circle can be changed.<\/h2>\n\n\n\n

As the focal length changes, the size of the image circle changes. The smaller the focal length, the smaller the image circle. As the focal length increases, the image circle also increases.<\/p>\n\n\n\n

This means that the angle of view can be changed to suit the purpose or application, depending on the sensor size of the camera.<\/p>\n\n\n\n

How to change the zoom spacer ring<\/h2>\n\n\n\n