Manufacturer: -TS Zubehör
Product number: TeleFokus75

EUR 79,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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rating: 5.0 of 5
  • Details..
  • Technical data..
  • In the box..
Telefokus - precise Focusing of your Camera Lens for Astrophotography
The Telefokus system has been developed from practical requirements. It offers precise focusing and fixes the position of maximum sharpness. Unintential adustment and therefore unsharp stars are avoided.

Focusing with stars - the challenge:
The autofocus does not work when taking images of the stars, so the lens has to be focused manually. A minimal displacement, almost just a slight touch is sufficient for turning a beautiful sharp star into an unsharp disk. Somewhen one is content with a coarse approximation according to the motto "it will fit somehow."

The Telefokus system loves this problem in a simple and effective way. A complete rotation of the thumbscrew rotates the knurled ring of the camera lens by 1 millimeter. If you turn the thumbscrew by 5°, the ring of the camera lens is rotated by only 0.013! You cannot focus thus accurate without this utility and you will notice the difference. The you lock the position with the locking screw and have, even after a longer exposure time, the guarantee that the focus is 100% kept.

Attaching the Telefok to the camera lens:
Attach the aluminum ring with the central bar to the rear part of the camera lens. The bar has to point to the front.
Attach the aluminum ring with the two thumbscrews to the front part of the camera lens which is turned for focusing. The central bar should be placed in the middle between the two thumbscrews.
Ready - now you can focus precisely, using the two thumbscrews and the central bar, and also lock the position, through simple tightening the locking screw.
Autofocus camera lenses have to be set to "manually".

Suitable for:All camera lenses up to 80 mm diameter
Material:Aluminum
Inner diameter:80.0 mm
For lens diameter:40-80 mm
2x Aluminum rings with three thumbscrews for installation
Central bar and two thumbscrews for fine focusing



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Reviews

Written by Michal Kubisz
on 2022-07-19

"Works great with Samyang 135 mm, perfect focusing! I wonder how I could live without it."

Written by Thomas Lehner
on 2021-12-30

"Ideale Hilfe zum Scharfstellen zb trotz Objektivheizung"

Written by Roland Hülle
on 2021-11-24

"Robust verarbeitet, es erfüllt aber seinen Zweck. Eine große Hilfe, um den perfekten Focus zu finden."

Written by Günther Dick
on 2021-04-12

"Nicht unbedingt ein Glanzstück der Feinmechanik; aber es funktioniert und erfüllt seinen Zweck :-)"

Written by Gerson Pinto
on 2017-08-23

"Essencial product for camera lens"

Written by Janos Barabas
on 2016-10-08

"I use this focuser adapter for my Canon lenses. It works OK, but the two setting screws are a bit loose in their housing, so it gives a sideways play. I would be glad to see the adapter with one screw going all the way through, than you don´t have to losen one side before tightening the other side."