Replacement of Corrector Plate Lens For Celestron C11, 11″ Edge HD
£490.00 VAT inc
A Replacement “corrector plate” lens for Celestron C11 both standard & Edge HD. Manufactured & supplied by Celestron.
Price includes collimation. Suitable only for models with “Fastar” removable secondary housing
Do not order if there is additional damage to the interior (either mirrror or focusing), as repair will be unviable. See our replacement optical tube assemblies (OTAs).
You must remove all the broken glass. UK customers only. Servicing time approx 20 days.
In Stock For Delivery
- Are You Visiting Our Store? CLICK HERE For Today's Availability
- Delivery or Click n Collect
- 28 Days Returns Policy
The following is a helpful guide & not exhaustive instructions. You should not attempt the fitting of a corrector plate unless you are confident of success.
You will want to make sure the inside of the OTA & its mirror is clean & free from all broken glass. You will also want to clean the glass & mirrors with de-ionised distilled water & a clean lint-free cloth. Use the cloth around the radius of glass surfaces.
Fitting a replacement SCT corrector plate:
Technically, the corrector plate (CP) has a correct rotational position & they used to be made with that index mark. They now arrive without that factory markings. There is a way to get a replacement CP installed correctly without the index mark.
Firstly, ensure the replacement CP is not upside down. You can use a “reflection test” to find the side that has been specially shaped:
Lay the corrector plate flat on a clean, dark, soft lint-free cloth. Look at the reflection of a straight overhead light (like a window frame or a tube light) in the CP glass. Slowly move your head so the reflection moves towards the very edge of the plate. On one side of the glass, the reflection will stay perfectly straight. On the other side, the line will look slightly “wavy” or bent as it reaches the edge. The side where the reflection looks wavy must face inwards, towards the main mirror.For the rotation, since these are standalone parts and don’t have marks to line up with your primary mirror, it will take some trial and error. You’ll need to test it on a star; if the star looks like an oval when you’re out of focus, just rotate the glass 90 degrees and check again. You might need to make smaller adjustments until the star looks like a perfect, concentric circle.
Accessories We Recommend
In Stock For Delivery
Recently I smashed the corrector on my C11 XLT (non edge) I thought the scope was a complete right off until I found this replacement offered by Grovers Optics.
I can say that this is a genuine product exactly as the original in every way. The images produced by the telescope now are the same as they were before the smash.
The replacement corrector arrived within 2 weeks to Australia and was in perfect condition.
I am very happy with the service and product and would recommend to anyone who has had the misfortune of destroying their scope.
5 thumbs up!!!