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Altair Parfocal Rings 1.25 Inch x2

Altair Parfocal Rings 1.25 Inch x2

A set of two premium quality 1.25" parfocalising rings each one is 4mm thick for Cameras or eyepieces. Perfect for accurately setting focus distance for imaging or between eyepiece and camera swaps. Includes ball-head Allen key for easier adjustment at an angle tha straight cut keys. The rings are precision machined hard-anodised aluminium with 3x stainless grub screws for accuracy.

The grub screws don't rust, unlike black steel ones, and there are three instead of one, which means the ring doesn't tilt so it's more accurate. Each ring is precision machined at a thickness of 4mm.

For imaging
Parfocal rings are very useful to get course focus between a 1.25" camera (like Altair GPCAM) and a 1.25" telescope eyepiece, so you can use the eyepiece to center an object and then swap with the camera to get it in the field of view. Then you can fine-focus the camera and away you go. No more hunting around for objects with camera in place.

For visual observing
Most eyepieces have different focal points. Parfocal rings let you swap quickly between, say a low power and high power eyepiece without having to refocus. Quick and convenient.

For autoguiding
Some guide scopes don't have focusers. You can use a parfocal ring to match the focus point on the camera and guide scope. Then once you are focused, you can remove the camera and replace it without having to refocus, saving time.

Customer Reviews

  Very Happy  4mm thickness gives more focus travel on the eyepiece barrel than on other makes. This Allen key fixing is preferred to the knurled knob type because you could loosen it by accident in the dark thinking it was one of the eyepiece holder knobs thus loosing your Parfocal position for the ring.  (29/06/2018) Paul Allen - WOKINGHAM


Please order by December 18th at the latest for xmas - we close on Friday 20th December and re-open on Thursday 2nd January 2020. Our delivery charge for most of the UK is £2.95. All orders are shipped promptly, lower value items are sent Royal Mail 1st class and higher value or larger goods are shipped via reputable courier. All goods are shipped fully insured with FEDEX, UPS, DPD, DHL and Royal Mail, we do not use budget courier services, we can only ship to UK mainland addresses and are not able to ship to forwarding agents or PO boxes.

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Altair Parfocal Rings 1.25 Inch x2

MPN: PAR-125-2SET





Price: 8.00

Including VAT and Warranty ✔


A set of two premium quality 1.25" parfocalising rings, for cameras and eyepieces for telescopes with 1.25 inch barrels. Perfect for accurately setting focus distance for imaging or between eyepiece and camera swaps. Includes a quality ball head hex key for easier adjustment at an angle tha straight cut keys. The rings are precision machined hard-anodised aluminium at 4mm thickness each with 3x stainless grub screws for accuracy.

The grub screws don't rust, unlike black steel ones, and there are three instead of one, which means the ring doesn't tilt so it's more accurate.

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