£175.00

Starlight Xpress Off Axis Guider

The Slimline OAG features The 10 x 8mm prism fully illuminates a Lodestar or EX guider CCD and the pick-off axis may be adjusted to optimise the guide image quality.

Adds 17mm to the total back focus.

Total backfocus with SX Filter Wheel is 42mm

£189.00

Skywatcher Field Flattener for Esprit 120

An optically-matched M48-fitting doublet field flattener for Skywatcher's Esprit 120 ED PRO triplet refractor.

The M48 fitting provides a large clear aperture to reduce halation and a precision thread ensures the triplet and doublet lens groups are precisely aligned on the optical axis perpendicular to the image.

When used with the field flattener the Esprit-120 ED PRO's imaging circle is 44mm.

£15.00

HiTec Astro ST-4 Guide Cable

2m St-4 compatible Guide Cable

£199.00

Skywatcher Field Flattener for Esprit 150

An optically-matched M48-fitting doublet field flattener for Skywatcher's Esprit 150 ED PRO triplet refractor.

The M48 fitting provides a large clear aperture to reduce halation and a precision thread ensures the triplet and doublet lens groups are precisely aligned on the optical axis perpendicular to the image.

When used with the field flattener the Esprit-150 ED PRO's imaging circle is 44mm.

Notes

When fitting a DSLR camera you need only a M48 Ring to suit your Canon or Nikon camera. No additional spacers are required.
The spacing for dedicated CCD imaging cameras is 96mm from mating surface.
The rear thread is M48. When using T-threaded accessories you will need a FLO M48-T adapter.

£169.00

Altair 60mm Guide Scope Kit Straight Thru with non-rotating helical focuser (no eyepiece or illuminator)

Altair 60mm Guide Scope with a 1.25" non-rotating Micro focuser, OTA, rings, stalk, and UNIFBR base.

Focal length is 225mm (F3.75) which is perfect for autoguiding.
The focuser has a 1.25" ID push-fit adapter with brass compression ring, allowing use of auto-guiding cameras or 1.25" eyepieces.
The indexed micro-focuser can be locked, enabling the eyepiece or camera to set at the correct focus-point.
Because the focuser does not rotate, the guide camera is easier to focus and maintain alignment on-target.
The rear of the focuser also includes a T2 thread to allow the addition of extensions.

The finder stalk is compatible with most finder scope brackets on the market, but also includes a universal finder bracket (product code UNIFBR), with a cross-slotted hole pattern to fit most telescopes.

To attach the finder scope to dovetail bars, simply remove the stalk by means of the two set screws.

£205.00

Starwave MiniGuider 60 Side-by-Side dovetail bar kit for refractor auto-guiding

Now you can mount your wide field refractor of up to 80mm next to your autoguider unit, whilst keeping the centre of gravity as close to your mount as possible.

This is the ideal kit for someone starting imaging with a refractor up to 80mm. The perfect companion for the Starwave 70ED refractor and the iOptron ZEQ25 mount!

Starwave MiniGuider 60 Side-by-Side dovetail bar kit consists of:

The renouned Altair Astro 60mm Miniguider OTA, with special super-rigid locking focuser for your autoguider.*
Starwave 1.75" (44.45mm) width dovetail clamp to mount your refractor on one side.
The Starwave 200mm 1.75" (44.45mm) width Vixen-format dovetail plate which fits most portable mounts on the market today.
A set of mini guide scope rings with nylon tipped screws to mount on the opposite side of the dovetail bar, with connecting bar, to mount your 60mm Miniguider.
A set of M5 screws and nuts to mount the Miniguider 60 rings, and a set of M6 screws and nuts to mount the Starwave1.75" format clamp.
Features:

Can easily support refractors up to 80mm and will accurately guide up to at least 1000mm focal length without differential flexure.
Keeps your telescopes low and spaced widely enough apart such that the cables and autoguider unit can be adjusted easily without interfering with the main camera, unlike "piggyback setups". This is desirable when imaging with a DSLR enabling it to be easily rotated it when framing the subject. without fouling the autoguider unit.
The centre dovetail bar can be slid from side to side for easy balancing.
The Starwave Vixen-format clamp is strong yet light, with 2x spring loaded 2x steel alignment pins. The CNC machined e-coated knobs feature Teflon washers to stop binding. It also has a 1/4" UNC camera tripod thread on the underside, so you use it to mount your telescope on a camera tripod for casual stargazing, or daytime observation.
The Altair 60mm Miniguider probably needs no introduction. It's widely acclaimed for it's simplicity and accuracy, and is far easier to use than an Off-Axis-Guider (OAG) unit. It doesn't take up space in the imaging train, and require more adapters and calculations, nor does it cause flexure problems, due to it's unique locking focuser, with 3x clamping screws and brass insert. Selecting from a huge field of stars is easy at a very fast F3.75 so you don't need such a sensitive autoguider camera - and what's more, and theres no pickoff prism to intrude into the light-path of your full frame DSLR. Nor does it add flexure to the imaging train, or need to be frequently focused, unlike some cheap OAG units. Simply add your guide camera, set focus, and tighten the locking ring, and that's it. The Miniguider doesn't even need to point in exact the same direction as the main telescope so you can move it around in the (extremely unlikely) event you can't find a bright star.
The Starwave 200mm dovetail bar is strong, solid and more rigid than the cheap extruded rails often offered with guide-scope kits, and will fit the majority of mounts on the market.
* Do not be tempted to buy a finder-scope with a helical focuser for autoguiding. They focuser loses it's focus easily, and they aren't rigid enough for autoguiding due to the play in the helical mechanism. They are OK for eyepieces but not for autoguiding. We researched this thoroughly, and it's why we developed the superb Altair 1.25" locking focuser.

**Price Includes Carriage**

£139.00

Skywatcher Off Axis Guider

Designed for use with DSLR and CCD cameras, this low profile Off-Axis guider is a convenient alternative to using a separate conventional guide scope for astrophotography, offering several advantages.
· More precise tracking as mechanical flexure and image shift are eliminated from the system. The main camera and guiding camera will always move accurately together.

The overall system is much lighter and more compact as a separate guide scope is not needed.

Brighter, higher resolution images of the guide star on the guiding camera, as you are viewing through the main telescope. Easier to notice and correct tracking errors.

Supplied with 2” to M48, and M42 to 2” adaptors.

Profile approx 12mm

Skywatcher Coma Corrector for Newtonian Reflectors

Optimised for all Sky-Watcher fast-ratio f/5 Newtonian Reflectors / Dobsonians, with 2” focuser. Delivers stunning wide-field views with pinpoint stars to the edge of the field. Magnification remains unaltered. Supplied complete with necessary adaptors for visual use. For imaging use with a DSLR camera, a suitable M48x0.75 adaptor is required to match your camera. Sky-Watcher manufactured Canon and Nikon M48x0.75 adaptors are available

Skywatcher Field Flattener and.85x Focal reducer for Evostar ED80 ED100 ED120 Telescopes

Designed for serious Astro-Imagers. Optimised for the Evostar-80/100/120 ED PRO, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0.85x and provides much improved field-edge correction. Must be used in conjunction with Sky-watcher’s M48 Canon or Nikon T-ring adaptors