Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Includes 3 different lengths - 10mm 20mm 30mm. The required spacing can be achieved by combining several extenders of differing lengths,you can use 1 pcs, 2 pcs or 3pcs of the extension rings as you like. | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography | Fully aluminium anodized black.

Use this 15mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Idea accessory to link or extend 15mm of the M42*0.75 products | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | Fully aluminium anodized black.

【A Practical Binocular Harness Pack】: Celticbird harness pack is agreat for protecting binoculars/monocular and other accessories from the harsh environments impact. This will be the most comfortable and versatile binoculars harness bag once you owned! | 【Adjustable Straps】: With adjustable straps to achieve the best fit easily. And it meet people of different body types. | 【User-Friendly Design】: Front U-Shape pocket and adjustable buckle allows a variety of binoculars and monocular easy access, the front opening method is convenient. And the breathable mesh side pockets to holds small items needing quick-access convenience. | 【Breathable& Practical】: Equipped with a padded back and vented mesh back for superior airflow, providing extra comfort. The two side bags holds larger accessories such as a cell phone adpater. The Back zippered pocket holds accessories like lens cloth, manuals. The back Celticbird harness pack is perfect for outdoor excursions. | 【After-Sale Service】 If the product could not meet your expectations, just contact us and we would like to offer 100% satisfied service.

Use this 10mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Idea accessory to link or extend 10mm of the M42*0.75 products | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | Fully aluminium anodized black.

Use this 12mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Idea accessory to link or extend 12mm of the M42*0.75 products | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | Fully aluminium anodized black.

Use this 30mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Idea accessory to link or extend 30mm of the M42*0.75 products | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | Fully aluminium anodized black.

Use this 7mm extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. | Male thread M42*0.75; Female thread M42*0.7; eliminates a range of focusing problems. | Idea accessory to link or extend 7mm of the M42*0.75 products | The extension tube has a T2 interior thread and a T2 exterior thread for elegantly solving spacing problems in astrophotography. | Fully aluminium anodized black.

Compatible with a wide range of binoculars with or without a threaded tripod hole. | Features a standard 1/4"-20 screw thread, suitable for all the tripod with standerd thread, securely holds your binoculars in place. | Nylon Elastic Band & Magic Paste Design: Easy to mount, flexible lenght can bind different sizes of binoculars. | Excellent for birdwatching, hunting, hiking - it is lightweight and durable, making it a great accompaniment to your outdoor activities. | The binocular tripod mount measures 19cm x 11.6cm x 5.3cm / 7.5" x 4.6" x 2.1" .