Not a lot to say. Quick delivery, well packed and works well.

I would like to point out to people how fragile these things are. First night out with mine and it broke when it fell off the front of the scope.
I think it will do the job of focusing once you make sure you have secured it to the scope.

This item really works, no more chasing focus. Precise focus is achieved in seconds even when using a dew shield. The two plastic screws used to hold the mask in place are simplicity’ itself.

Get perfect focus quickly every time simple to use ,a must have for imaging ,highly recommend
use with Bahtinov grabber for even more accuracy http://www.njnoordhoek.com/?p=325

Unfortunately I didn’t have much of a chance to see how effective this mask is as it blew off my scope and smashed to bits on my patio.

It simply rests on your scope using two nylon threaded bolts so can be dislodged easily.

It may not be so much of a problem if you are using the scope on softer ground.

Absolutely brilliant - I’ve just tried it out for the first time and it really does take the guesswork out of focusing, especially when viewing via a DLSR tethered to a laptop and using Live View on-screen (which is inherently fuzzy and makes focus hard to judge).

A couple of other things: (1) being the clumsy oaf I am I dropped it twice onto a patio from about 1.5m and it survived unscathed (no shattering like other people have experienced). (2) If you can’t find the two plastic screws have a good search through the packaging material, they’ll be in there somewhere in a little plastic bag.

Not happy at all with that, dropped it from height of 70cm and split a a part like a piece of glass, and I am not only one who just weasted £19 Why is could be made from durable and flexible plastics? Why?

I got this mask and I am quite happy with it. It is well made with thick plastic.

Although I am happy with it, I have 2 minor complaints: The screw to hold it are really hard to push through the holes and I struggled a bit to fit them in. The screws that came with it are white, I wish they had been black like pictured on the website. Does not look as good with white screws

On a side note, it did not come with an instruction sheet. I had seen tutorial on youtube were people had the instructions sheet with pictures for that particular model. Again, really small complaint.

All in all good prodcut for the price!

I bought one of these for my 12" Dobo. It works very well, but you should be aware that it seems to be made of very brittle plastic. I dropped mine onto grass whilst removing it from my scope and it shattered into 3 pieces. I guess the large size of mine made it more prone to this.

What is the point of imaging for hours and hours if the focus isn't perfect? This simple mask does exactly what it says it does and performs excellently. Within a minute, you will achieve perfect focus without any overly-complicated equipment like robotic focusers. It is also very sturdy so it does not snap easily. I used one for my first imaging telescope, the Skywatcher Explorer 150PDS. Now I have two more for my two new telescopes. I would not go without one for each telescope!