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
$ 150.00
ready for shipping in 3-5
weeks
Artesky
Vixen-Style Prism clamp 150mm
$ 57.00
ready for shipping in 24
h
Bresser
Dovetail clamp Messier Vixen-Style
$ 45.90
ready for shipping in 24
h
William Optics
Vixen-Style 90mm Prism Clamp
$ 115.00
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
$ 169.00
ready for shipping in 24
h
ADM
Dual Saddle Plate XL for Skywatcher EQ-6R PRO mount
$ 441.00
ready for shipping in 24
h
ADM
VSAD-GP Vixen Great Polaris
$ 290.00
ready for shipping in 3-5
weeks
ADM
Dual Vixen/Losmandy Prism Clamp for Celestron AVX
$ 417.00
ready for shipping in 24
h
Omegon
Premium clamp
$ 69.00
ready for shipping in 24
h
PegasusAstro
Universal Clamp
$ 174.00
ready for shipping in 1-2
weeks
PrimaLuceLab
Prism clamp PLUS Vixen/Losmandy Maxi
$ 230.00
ready for shipping in 24
h
ASToptics
80MM DX LOSMANDY LEVEL DOVETAIL CLAMP
$ 115.00
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:
$ 139.00
Our price:
$ 126.00
ready for shipping in 24
h
ASToptics
150MM DX LOSMANDY LEVEL DOVETAIL CLAMP
$ 208.00
Sale price:
$ 127.73
ready for shipping in 24
h
TS Optics
Vixen-Style Premium Prism Clamp
$ 63.00
ready for shipping in 3-7
days
ADM
Dual iOptron GEM28 / CEM26
$ 371.00
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
$ 162.00
ready for shipping in 24
h
10 Micron
Losmandy-style clamp for GM 2000 mount
$ 337.00
ready for shipping in 1-2
weeks
Baader
Prism clamp, with handle, for Losmandy-style prism rail
$ 97.00
ready for shipping in 1-2
weeks
Artesky
Guidemount - ultra-compact Vixen GP level dual mount
$ 150.00
ready for shipping in 24
h
TS Optics
Prism clamp Premium XL Vixen-Style
$ 76.00
ready for shipping in 3-7
days
iOptron
iGuider Prism clamp
RRP:
$ 81.00
Our price:
$ 53.00
ready for shipping in 24
h
ASToptics
DX VIXEN/LOSMANDY CLAMP, 150MM
$ 232.00
ready for shipping in 24
h
TS Optics
Adaptor Dovetail Clamp from Losmandy to Vixen Level
$ 162.00
ready for shipping in 3-7
days
Geoptik
Losmandy to Vixen reducer
$ 92.00
ready for shipping in 24
h
PrimaLuceLab
PLUS Vixen/Losmandy with 1kg counterweight
$ 107.00
ready for shipping in 24
h
Rowan
Dual Vixen/Losmandy Prism clamp for AZ100
RRP:
$ 429.00
Our price:
$ 407.00
ready for shipping in 24
h
ADM
Dual Skywatcher AZ-5
$ 162.00
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
ADM
Prism clamp with Vixen-Losmandy adaptor
$ 313.00
ready for shipping in 3-5
weeks