About this product
A set of machined aluminium Parfocalising Rings to fit cameras or eyepieces with 1.25 or 2" nosepiece.
Slip one over the nosepiece then lock it in position via it's grub screws. An Allen key is included.
Useful for setting an imaging camera and eyepiece at the same focus point. You can then centre an object in the FOV using the eyepiece, swop it for the camera, tweak the focus and you're done.
Similarly you can fit them to eyepieces then swop between them with minimal refocusing required.
Note: These Parfocalising rings might not seat well if the nosepiece is tapered or has milled safety undercuts.
- 42.2mm outer diameter
- 5mm thickness
|Average Rating (8 Reviews):
Does what it says on the tin
18 April 2022 | Robert
These were the cheapest I could find. Rings seem well made with 3 grub screws to keep in place. Easy to fit. Quickly despatched by flo and can't fault the service
24 November 2021 | Ian
I purchased the 2" version to hold my SW Aplanatic CC partially out of the focus drawtube, rather than for eyepieces. Works fine for this. The only reason it did not get a 5* review is that there is no compression ring to it could damage the finish of the eyepiece / equipment it is being used to clamp.
Astro Essentials Parfocal RIngs
20 May 2021 | Steve
Quality product looks better on eyepiece nose than simply rubber ‘O’ rings.
04 May 2021 | Paul
Each ring is CNC'd 5mm thick with 2 grub screws to lock in place (allan-key supplied). Nice snug fit. A pair was ideal for raising my Komakorr Coma Corrector 1cm out of the focus tube without introducing slop with an extender.
25 August 2020 | Tim
Does the job. Great value.
22 May 2020 | Neil
Good quality items, great service and good price also really good postal charge, why do other suppliers charge so much on postage !!!.
19 July 2019 | Stephen
Works great with flip mirror.
08 July 2019 | Allan
Very well made and at a good price.
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