Brand: Baader Planetarium

Baader Planetarium T-2 / 7.5mm/15mm/40mm Extension Tube (T-2 part #25A/25B/25C)

Brand: Baader Planetarium

Baader Planetarium T-2 / 7.5mm/15mm/40mm Extension Tube (T-2 part #25A/25B/25C)

$25.00 USD

Focal Length

7.5mm (1508155) 15mm (1508154) 40mm (1508153)

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Product Description

For over 30 years we have focused on the Astro T-2 thread system (M 42 x 0.75 mm); virtually every telescope manufacturer must offer this thread far ahead of the focal point of his instrument, such a universal T-ring (for DSLR cameras) can be connected.

The only exceptions are (still) Russian equipment, there the thread diameter is the same, but the pitch is still 1mm per revolution - rather than 0.75mm! Therefore, we offer among other things a "Russians adapter". At only 7mm additional optical length it can allow so many Russian lenses or telescopes to be compatible with an international Astro T-2 (M 42 x 0.75mm) connector!

For the sake of better recognition mostly are marked. See marking small 'a' or small 'i' in the respective indication! "a"; identifies an external thread (male); or, if Ø sign which a diameter, "i"; - a female is always (female) or - Ø character - an inner diameter.

Specifications

MODEL T-2 / 7.5mm
Extension Tube
T-2 / 15mm
Extension Tube
T-2 / 40mm
Extension Tube
SKU (#) 1508155 1508154 1508153
EAN CODE 4047825016201 4047825016218 4047825016225
NET WEIGHT (G) 15 25 45
OPTICAL LENGTH (MM) 7.5 15 40
T-2 PART # 25C 25A 25B
USAGE For Eyepiece Projection with Sliding Focuser
INNER DIAMETER / CLEAR APERTURE (MM) 38 38 38
OUTER DIAMETER 46 46 46
INNER CONNECTION (LENS SIDED) Thread, T-2 (M42 x 0.75)
OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, T-2 (M42 x 0.75)
COMPATIBLE BRANDS Astro T-2, Baader Planetarium
TYPE OF ADAPTER Extension Extension Extension
FILTER SIZE 7.5 mm 15 mm 40 mm

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