Fits my skywatcher 150P just fine. It does seem to be a little bit higher than the stock one, about 1.4mm. Not a big deal but if your back focus is already a problem you need to take this into account. I only wish flo would have a shop on the mainland because with Brexit I now paid almost the same amount again for customs handling and import tax.

So glad I got this, a massive improvement on the factory supplied version. Nothing else to add other than it works!

I nice little upgrade to my 130pds, the 2" adapter which is supplied with the telescope doesn't really aid you confidence with £800 worth of imaging train hanging upside down and held on by just two screws, what the compression ring does is that it not only keeps things nice and secure by means of the increased contact surface area, but also does a better job of keeping your image train nice and square in the focuser. Nice little purchase was this.
Big thanks to FLO for the speedy delivery as always.👍

Good quality build great delivery from flo as always

First up, excellent and very timely service, as always website very current on stock levels. Thank you.

Easy to fit onto Skywatcher 250P-DS
Much more secure and reassuringly solid feel when changing eyepieces/Barlows.

At last an M54 adapter that has a compression ring. Now I can enjoy precise centering of eyepieces, adapters & camera's, great for collimation & all without marking the outside of the barrel or without making that slight adjustment as with the previous screw type. Excellent product really happy with it!

I honestly don't understand why Skywatcher puts such an inferior visual back on their ED scopes. This product is a perfect fit and you can rest assured your eyepieces and adaptors will not get scuffed or beaten up. Great machining and paint finish. I ordered this from Florida and received the item within a week. Great service and products from our friends across the pond.

Works perfectly. I am very happy with it.

Perfect fit, quality item and great service from the staff at Firstlight!

With a compression ring rather than just two screws this doesn't mark the body of any push-fit flattener or star diagonal. Some people have said it has problems with a tapered nose piece such as the OVL flattener has, but I have had no trouble with obtaining a secure and snug fit.