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Model: SW65Brand: Starwave
Generally In Stock, Please Confirm Before Ordering
Whether you’re doing planetary visual observing, planetary imaging, or deep sky imaging, the Bahtinov Mask is a great accessory to get the best focus for your telescope quickly and easily. Credit goes to Russian amateur astronomer Pavel Bahtinov for making his idea available to the astronomy community.
Starwave TM Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope. They have an adjustment lattitude of about 50mm in aperture making them very versatile.
Starwave TM Bahtinov masks are made from precision laser cut ABS plastic, which is stiff enough to remain in position, yet has enough “give” to make them tough without being brittle in the cold, unlike acrylic masks which are made from thick, heavy, brittle and hard acrylic plastics.
Starwave TM bahtinov masks grip the telescope tube gently but firmly with three metal posts covered in non-scratching silicon sleeves. This prevents slippage, whilst allowing the mask to remaining perfectly central. This is unlike other masks with two posts, which rely solely on gravity to hold them in position. Because of this 3-post mounting, the Starwave Bahtinov mask remains centred, whilst fitting a wider range of telescopes, saving you money if you decide to change optical tubes. So, all you need to do is measure the outer diameter of your telescope tube or deshield, and choose a model corresponding to that OD dimension.
I had read about the Bahtinov mask and the 'easy' way you can make your own. Although I am very adept at constructing models etc. and was contemplating making my own, I decided to buy one of these to match all the other professional accessories I have for my LX-200 8inch scope. I thought initially it was a bit expensive but when I received the mask it was worth every penny. As the description says, the ABS plastic is very professional and is very well cut. It will not give me any problems on cold nights! The three metal posts are well engineered and have a thick silicon removable coat which gives the mask a great feel and hold on the telescope with no scratches. It took a couple of minutes to tighten these onto the mask so that it is symmetrical on the scope and now it just slips on and off the scope as required. Saying that, they do hold the mask on the scope with a reasonable firmness. I am very pleased with the product and would recommend any one to buy one if they use this method of focusing - much better than hand made!
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