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Alstar Bahtinov Mask Focusing Mask for Telescopes - 85mm-120mm Tube OD
These focusing masks are designed to work exceptionally well with both reflector and refractor telescopes, regardless of their focal length. To use them, simply measure the size of your telescope tube and select the appropriate mask size (feel free to reach out to us if you need guidance on where to take the measurement).
Crafted from 2mm thick laser-cut ABS, these high-quality Bahtinov masks feature soft plastic-capped securing screws that won't damage your telescope. Unlike masks designed for a single telescope, these adjustable models can fit a wide range of optical tubes, with an adjustment latitude of approximately 85-120mm, depending on the specific model.
The masks grip the telescope tube gently yet firmly, thanks to their three metal posts equipped with non-scratching silicon sleeves that protect the valuable telescope surface. This three-post mounting design ensures the mask remains centered, allowing it to fit a broader range of telescopes without slipping.
These versatile masks are suitable for use on all types of telescopes, including reflectors, refractors, Dobsonians, Maksutov-Cassegrains, and Schmidt-Cassegrains. Crafted from precision laser-cut reinforced plexiglass, they are stiff and long-lasting, and will not become brittle in cold weather, unlike masks made from standard plastics.
Bahtinov masks take the guesswork out of the focusing process, providing a mathematical approach that can overcome even challenging seeing conditions. With these masks, you can quickly and easily achieve the best focus for your telescope.
In summary, these focusing masks are designed to be highly versatile, compatible with a wide range of telescope types and sizes, and engineered to protect your valuable equipment. Their adjustability, durable construction, and precise focusing capabilities make them an invaluable tool for astrophotographers and stargazers alike.
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GUARANTEED SAFE CHECKOUT
24 Hours Cancellation
We accept order cancellation before Within 24 hours the product is shipped. If the order is cancelled you will get a full refund.
30 Days Returns & Exchanges Policy
If for any reason you are not satisfied with the purchased item,You have 30 days after delivery of your order to return an item.
After 30 days of delivery of your order, we will no longer accept returns.
Refund Process & Return conditions:
To request a return,please email us at:[email protected] ,We will respond within 24 hours after
the consumer sends the email (except weekends).
If it is a quality issue, please
provide an order number and attach clear photos of the items that represent the
issue.
After we receive the returned order, our Quality Assurance department will
inspect and verify the condition of the item.Upon acceptance of your return, a refund
will be issued to the original form of payment within 1-3 business days.
Make sure your item meets all our return conditions :
Items returned without authorization will not be accepted.
The time frame for return
must not exceed 30 days from when the original order was received.
Any promotional
gifts must also be returned with your returned item.
All items must be returned in
their original condition, without scratches or signs of wear, and must not be resized or
altered in any way.
Your return needs to be sent within the given time frame(3-12
working days)
Please make sure you provide us the tracking# and receipt after you
return.
Refunds
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, we will credit the credit limit to your credit card or original payment method within 5 business days (bank processing time frame).
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