Manufacturer: -TS Zubehör
Product number: TSFOCN1

EUR 108,90


incl. 19 % VAT (DE)  
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rating: 4.0 of 5
  • Details..
  • Technical data..
  • In the box..
  • FAQ..
  • Manufacturer infos..
  • Safety informations..
A solid 1.25" Crayford focuser for the self construction of Newtonian telescopes
This focuser is a good solution for astronomers who want to build a Newtonian telescope themselves or improve an existing telescope. The focuser is versatile and can be used for observation and astrophotography.

The most important properties and product features:
Suitable for tubes from 178 mm diameter - the base is curved. Smaller tubes require a spacer, for example washers.
The focuser can also be used for larger tubes, so that it rests firmly on the outer edges.
The focuser is ball-bearing mounted, which ensures good adjustment even with heavy accessories.
The position of the extension tube can be fixed with a knurled screw.
A second knurled screw adjusts the movement resistance (friction). Even heavy accessories can no longer sag.
When unscrewing the 1.25" receptacle, the internal T2 thread (M42x0.75) becomes visible. Then you can screw on a camera with our adapter T2a-T2a and the matching T2 ring.


Quick manual
Telescope-Service provides a quick guide for the TS Crayford focusers. You can download the PDF here.
Type:Newtonian focuser with ball bearing
Overall height for tube with nominal diameter:56 mm for T2, 78 mm for 1.25" (all dimensions approx.)
Overall height above the lateral edges:63 mm for T2, 85 mm for 1.25" (all dimensions approx.)
Height without base plate:50 mm for T2, 71 mm for 1.25" (all dimensions approx.)
Adjustment range:48 mm
Free aperture:41 mm (w/o 1.25" adapter)
Adapter plate to the telescope:Curved adapter plate, suitable for tubes from 178 mm diameter.
Connection dimensions:Screw spacing lengthwise approx. 57.5 mm, crosswise approx. 55 mm
Telescope side ring dovetail:⌀ 61 mm
External dimensions base plate:71 mm x 71 mm
Baseplate mounting to tube:M5 cyl head screws (not supplied)
Eyepiece-side connection:T2 female thread (M42x0.75) and 1.25" (31.7 mm) receptacle
Weight:0.385 kg
1.25" focuser with telescope connection plate


Question:
What´s the best way to adjust a Crayford focuser???

Answer from Teleskop-Service:
The focuser has two knurled screws at the base between the two rotary handles. With these you can adjust the focuser.
The screw on the eyepiece side is for adjusting the friction (fgrip).
The screw on the telescope side is for locking the focuser position.


1. Insert the eyepiece and possibly the star diagonal into the focuser so that the focuser is under load.

2. Loosen the screw on the telescopie side (clamping).

3. Now tighten the screw on the eyepiece side just enough to prevent the focuser from slipping when the eyepiece is pointing downwards (maximum load).

With this you have optimally adjusted your Crayford for observation and of course also for photography.
Manufacturer / Importeur:Teleskop-Service Ransburg GmbH
Street:Von-Myra-Str. 8
ZIP / City:85599 Parsdorf
Country:Germany
Telefon number:+49 89 99228750
Email:info@teleskop-service.de
Website:www.teleskop-express.de
Safety informations: PDF Download


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Reviews

Written by Jens Mielke
on 2025-04-04

"Gute Qualität passte leider nicht am meinen Tubus was schade war hätte ich gerne verbaut "

Written by Christian Zumbrunn
on 2025-02-19

"Sehr hochwerig und gut mit APS-C DSLR belastbar! Wurde direkt an einen Vixen R130Sf Newton geschraubt. Auszugsloch musste mit der Feile leicht erweitert werden und die Löcher für die Befestigungsschrauben gebohrt werden und dann passt das wunderbar an den OTA. Würd ich wieder kaufen!"

Written by Damjan Mlakar
on 2021-12-03

"Perfect for my home made newton. Even I need made some modifications on tube...as expected."

Written by CATERINA IACOBIS
on 2021-05-11

****

Written by Tom Regnery
on 2021-04-06

"Im Grunde das kleinere Modell der 2""-Crayfords. Um einem kleinen Newton einen stabilen leichtgängigen OAZ anzubauen absolut zu empfehlen. In meinem Fall war er leider zu hochbauend. Das hängt aber vom Teleskopdesign ab und ist kein Qualitätsmerkmal."

Written by Carsten Deiter
on 2020-12-23

"Gutes Design, gutes Material, gute Fertigung. Ist den Preis wert und funktioniert hervorragend."

Written by Sven Hendricks
on 2020-06-09

"Als Austausch für den Orginalen Discounter-Teleskop-OAZ. Das ist mal was ganz anderes als der Kunstoffmüll. Ich habe es auf einem 114/900er und mit etwas Anpassung (Rohrkrümmung) passt er super und arbeite wie gewünscht."

Written by Bastian Schmandt
on 2020-05-26

"Verstellung der Spannung für die Druckrolle etwas fummelig, Vestellweg ist sehr lang, daher baut der Auszug etwas hoch auf und der Fangspiegel muss groß dimensioniert werden. Dafür kann mein Newton jetzt sehr gut fokussiert werden und auch sehr nahe Objekte zeigen. Dies ist gut, um z.B. bei Tag den Pointer zu justieren "

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