Telescopes and accessories are often equipped with a prism rail - also called a dovetail bar. This rail can be attached firmly by means of a dovetail clamp to, for example, an astronomical mount.
Two standards have been established for the rails: the relatively narrow rails introduced by the Japanese manufacturer Vixen and the wider Losmandy rails. The latter are 3 inches wide and are mainly used for heavy telescopes.
Accordingly, there are dovetail clamps for Vixen or Losmandy rails. Dual dovetail clamps can accommodate both sizes.
PrimaLuceLab
PLUS Vixen / Losmandy prism clamp
$ 79.00
ready for shipping in 24
h
Omegon
Dual prism clamp (Losmandy- and Vixen-Style)
$ 99.00
Sale price:
$ 61.00
ready for shipping in 24
h
ADM
Prism clamp/adaptors for Skywatcher StarAdventurer GTi
$ 149.00
ready for shipping in 24
h
ASToptics
80MM DX LOSMANDY LEVEL DOVETAIL CLAMP
$ 115.00
ready for shipping in 24
h
Bresser
Dovetail clamp Messier Vixen-Style
$ 45.90
ready for shipping in 1-2
weeks
William Optics
Vixen-Style 90mm Prism Clamp
$ 115.00
ready for shipping in 24
h
Artesky
Vixen-Style Prism clamp 150mm
$ 57.00
ready for shipping in 24
h
Artesky
Vixen-Style Prism clamp 80mm
$ 49.90
ready for shipping in 24
h
PrimaLuceLab
PLUS Vixen /Losmandy prism clamp, large
$ 168.00
ready for shipping in 24
h
ADM
Dual Saddle Plate XL for Skywatcher EQ-6R PRO mount
$ 438.00
ready for shipping in 24
h
ADM
VSAD-GP Vixen Great Polaris
$ 288.00
ready for shipping in 3-5
weeks
ADM
Dual Vixen/Losmandy Prism Clamp for Celestron AVX
$ 415.00
ready for shipping in 24
h
Omegon
Premium clamp
$ 69.00
ready for shipping in 24
h
PegasusAstro
Universal Clamp
$ 173.00
ready for shipping in 1-2
weeks
PrimaLuceLab
Prism clamp PLUS Vixen/Losmandy Maxi
$ 229.00
ready for shipping in 24
h
PegasusAstro
Saddle Powerbox NYX-101
$ 530.00
ready for shipping in 1-2
weeks
iOptron
Secondary Dovetail Saddle
RRP:
$ 138.00
Our price:
$ 125.00
ready for shipping in 24
h
ASToptics
150MM DX LOSMANDY LEVEL DOVETAIL CLAMP
$ 207.00
Sale price:
$ 127.05
ready for shipping in 24
h
TS Optics
Prism clamp Premium XL Vixen-Style
$ 76.00
ready for shipping in 3-7
days
TS Optics
Vixen-Style Premium Prism Clamp
$ 63.00
ready for shipping in 3-7
days
ADM
Dual iOptron GEM28 / CEM26
$ 369.00
ready for shipping in 3-5
weeks
Artesky
Premium Losmandy-Style 255mm Prism Clamp
$ 115.00
ready for shipping in 24
h
ADM
Prism clamp for Skywatcher AZ-GTI Mount
$ 161.00
ready for shipping in 24
h
10 Micron
Losmandy-style clamp for GM 2000 mount
$ 370.00
ready for shipping in 1-2
weeks
Baader
Prism clamp, with handle, for Losmandy-style prism rail
$ 96.00
ready for shipping in 1-2
weeks
Artesky
Guidemount - ultra-compact Vixen GP level dual mount
$ 149.00
ready for shipping in 24
h
iOptron
iGuider Prism clamp
RRP:
$ 80.00
Our price:
$ 52.00
ready for shipping in 24
h
ASToptics
DX VIXEN/LOSMANDY CLAMP, 150MM
$ 230.00
ready for shipping in 24
h
Geoptik
Losmandy to Vixen reducer
$ 92.00
ready for shipping in 24
h
TS Optics
Adaptor Dovetail Clamp from Losmandy to Vixen Level
$ 161.00
ready for shipping in 3-7
days
PrimaLuceLab
PLUS Vixen/Losmandy with 1kg counterweight
$ 107.00
ready for shipping in 24
h
ADM
Dual Vixen/Losmandy Prism clamp for Skywatcher AZ-GTi
$ 184.00
ready for shipping in 24
h
Rowan
Dual Vixen/Losmandy Prism clamp for AZ100
RRP:
$ 427.00
Our price:
$ 405.00
ready for shipping in 24
h
ADM
Dual Skywatcher AZ-5
$ 161.00
ready for shipping in 24
h
Lacerta
Premium Dovetail Clamp Vixen-Level 63mm
$ 58.00
ready for shipping in 1-2
weeks
Artesky
Vixen-Style Prism Clamp
$ 57.00
Product can be shipped as of 15.11.2025