The Bahtinov mask has become the preferred method of focusing a telescope, either visually or when imaging with a CCD camera, DSLR or webcam. Precise and repeatable focus can be achieved in under a minute, even in poor seeing conditions. The mask displays a unique diffraction profile, one part of the diffraction pattern moves in response to changes in focus and displays error as a displacement from a clearly defined point.
Straight sides ensure the focus mask will not roll away when stored on the shelf, matt-black surface prevents reflections and a reflective high visibility corner makes it easy to locate in the dark.
Credit goes to Russian amateur astronomer Pavel Bahtinov for creating the design and making it available to the astronomy community.
|Average Rating (32 Reviews): |
Tuesday, 30 November 2021 | Alan
I now have peace of mind that I am in perfect focus.
StarSharp Bahtinov Focus Mask
Monday, 27 September 2021 | Mark
Excellent piece of kit, makes accurate focus a breeze.
Saturday, 10 April 2021 | Neil
looks great but not had chance to use it yet due to something called cloud
Bahtinov Mask 102mm Refractor
Thursday, 28 January 2021 | John
Not used as yet (weather!); But nice solid build quality and swift delivery.
Star sharp for Takahashi fsq-85 ed
Monday, 18 January 2021 | Vincent
As N engineer i was expecting at least a plastic mask!
What was received was MDF with 3 holes in the wrong positions. So have modified to work, do not allow this product to get damp or wet as will be rendered usless.
First rate service from FLO
Tuesday, 12 January 2021 | Owen
Item was delivery very promptly given the current situation. Very good quality product. Not used it yet as still waiting for mount to arrive. However it looks like it should be very good.
Tuesday, 3 November 2020 | Udi
That Bahtinov mask is working properly, and I managed to perfectly focus the stars with it. Thank you!
Great service and does exactly what it's supposed to do
Friday, 30 October 2020 | Rob
Feels solid enough, hangs off the dew shield no problem and does the job! Arrived within 2 days
StarSharp Bahtinov Focus Masks
Thursday, 29 October 2020 | William
Makes focus a very easy matter. The diffraction spikes are very clear from any bright star.
These are made from a robust material that can take the occasional drop onto the floor.
I use a 2nd cloned screen from my warm room display relaying the output from my camera up beside the mount. (yep ....still using manual focus).
Looping a focus plan from APT and the scope on a bright star the screen refreshes every few seconds displaying a very clear pattern to get very accurate focus before setting off taking images. (The bigger screen being better than just the on camera small screen to get exact focus).
You need one of these in your life!
Wednesday, 22 July 2020 | Paul
I always thought I was pretty good at "eyeballing" focus. Visually I think I get close enough... I got quite a shock when it came to imaging! Even with the 2 speed focuser on my scope I always managed to be a little off.
I was always familiar with Bahtinov masks as I have one for me EvoStar 120. As I had not used a scope in 6 or so years, I forgot how important they are.
Find a brightish star, pop the mask on and balance the spikes and you are good to go. Focusing takes seconds and once dialled in your able to image with confidence.
Don't even think about not buying one, or that somehow you'll get by - my mask is probably one of the most important purchases since upgrading my scope.
It's simple, effective and satisfying to use. What's not to like?
Read all 32 customer reviews...