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ドイツ製2インチ直進ヘリコイドです｡
M48 フィルターネジ(M48P0.75)で接続します｡
長さ51mm〜91mmまで伸び縮みさせることが可能です｡



【原文】
TS Helical Focuser with M48 - 2" filter - connection - non rotating version
... deluxe focuser with index marks for fine focusing of CCD cameras and eyepieces
... with 2 screws to fix the focus position
... M48x0,75 female thread on the telescope tube site and M48x0,75 male thread on the Camera site
... you also can use the focuser as a variable M48 extension 51mm to 91mm



A true helical focuser like this TS Helical Focuser, works like a camera objective -- when you turn the focusing ring, neither the lens nor the camera (or eyepiece and diagonal) rotate. The only motion is in and out.

The advantage of this helical focuser is the fine adjustment possible, in part due to the fine pitch of the focusing ring's thread, and in part due to the large diameter of the ring. In the case of the TS Helical Focuser, virtually backlash-free movement and graduated markings on the focusers allow repeatable return to the focus point simply by noting the focus position reading.

Advantages of the TS non rotating helical focuser:

-- no rotation of the diagonal or camera - only motion is in and out
-- wide focus range ... 51mm minimum heigh / 91mm maximum heigh
-- simple adaption to the telescope tube with the M48x0,75 (2" filter) thread
-- good solution for telescope or objective self build
-- simple adaption to camera and/or eyepieces
-- wide free aperture 45mm
-- also good for use as a variable M48 extension 51mm to 91mm

Wide Focussing Range

The Helical focuser has a wide focussing range of 40mm. The focuser is very short, the minimum heigh is 51mm. So you can use the focuser on telescopes or tele objectives with small space to the focus point.

Specifications:

-- non rotating helical focuser with index marks and fixing screws
-- connection thread on the telescope site ... female M48x0,75 thread (2" filterthread)
-- connection thread on the camera site ... male M48x0,75 thread
-- minimum heigh ... 51mm
-- focussing range ... 40mm

Optional acessories:

Connections to Objectives or Telescope tubes:

-- TST2-M48L .... Adaptor to T2 thread
-- TSVF230 ... Adaptor to 2" barrel ( connection to 2" barrel of telescopes)
-- TSSC-M48 ... Adaptor to SC Thread (connection to Schmidt Cassegrain telescopes)

Connections on the camera site of the focuser:

-- TSM48-T2 ... Short adaptor to T2 thread
-- TSM48-2 ... Adaptor to 2" barrel
-- TS2-1 ... Adaptor to 1,25" barrel
-- TS2-1-T2 ... Adaptor to 1,25" and T2 barrel