William Optics Bahtinov Mask for Dew Shield ~diameter 75mm to 110mm

William Optics Bahtinov Mask for Dew Shield ~diameter 75mm to 110mm

  (5 Reviews)
✓ 2 year warranty


5x in stock shipped 1-2 working days

About this product

Model:  wo-bm-ds-gr45
Part Number:  bm-ds-gr-45

New William Optics bahtinov focusing mask made of acrylic sheet which maximises light transmission for ease of use.

The new Optical acrylic sheet offers 92% of light transmission that gave you the highest and brightest diffraction Spikes for Focusing !

It’s approx 3 times brighter than a traditional metal mask.

Customer reviews

Average Rating (5 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Expensive but the best
Thursday, 8 September 2022  | 

Clear plastic Bahtinov mask for accurate focussing of stars. Expensive piece of plastic, but itís better than others available on the market, and it does itís job very well.

Rating (max 5):  
W.O. Bahtinov mask
Monday, 16 May 2022  | 

The Bahtinov mask arrived on time and well packed with just the right amount of protection.
Rather expensive but it is a branded mask so thatís what you pay for
I contacted the help desk regarding wether I had ordered the incorrect side but the reply was prompt and I was assured that even if the item was opened the 30 day money back guarantee would still be in place so top marks for putting my mind at rest would highly recommend F.L.O. to one and all.

Rating (max 5):  
Very nice, very expensive piece of plastic
Tuesday, 8 March 2022  | 

Wanted a mask that lets more light in. It's been said already that this is a very nicely made but very expensive bit of plastic. But I knew that and I am not disappointed!

Rating (max 5):  
William Optics Bahtinov Mask
Tuesday, 28 December 2021  | 

Good Quality Mask. Much improved focusing through more light getting in. Should have bought one of these a while ago. More expensive, but thicker, stronger and better quality all round. It is what you need.

Rating (max 5):  
WO Bhatinov Mask
Tuesday, 5 January 2021  | 

Quite pleased with the mask. It definitely gives a nice, clear diffraction pattern that enables quick, and precise focussing. The silicon-sleeved, adjustable screws grip the lens, or scope very nicely, with no danger of slipping if adjusted correctly. The mask arrived very well packaged, and seems to be a very nice piece of kit. I canít give it five stars though, as it is incredibly expensive for a sliver of PVC, no matter what grade of PVC it is.


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