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All domestic packages are shipped for Free (Unless other shipping method was selected during the checkout) 

  • Items may ship directly from our suppliers
  • We ship within three business days of payment, usually sooner
  • Standard FREE shipping takes between 3-5 business days
  • Expedited shipping takes between 2-3 business days
  • Overnight shipping takes between 1-2 business days

 

We do not recommend P.O. BOXES - Providing a P.O. Box may result in delivery delays, and some items cannot be shipped to a P.O. Box at all. PLEASE PROVIDE A PHYSICAL ADDRESS

 

We Ship Globally using eBay's Global Shipping Program (GSP). The item is sent to the GSP logistic center in KY and shipped from there to the rest of the world.

  • International customers are responsible for all duties and taxes
  • Contact your local authority for questions related to the amount of duties or taxes you will be responsible for

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In the event that you would like to return your purchase, we allow returns that are processed within the defined return date (the return date is to be found in the return policy/shipping and handling section)

Please contact us for a return authorization and the return shipping address. Please contact us for a Return Merchandise Authorization (RMA) number. We advise you to use a reputable carrier service when returning your goods. Please pack all returns appropriately.

 

  • We ship globally Via eBay's global shipping program (GSP). Thus we don't cover returns for items shipped globally. Buyers returning such items will be refunded ONLY for the item's cost and not for the shipping.
  • please check the Voltage information and make sure it matches the one in your country. In case it's not stated in the description, do ask us. 

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PayPal is our preferred method of payments it's the quickest, easiest and most secure way to pay for your goods or services online. PayPal offers buyer and seller protection should there be a problem.

If you do not have a PayPal account, to get started and buy your first item with us is very easy. Simply click on the 'Buy It Now' button and follow the eBay checkout steps. Select PayPal as the payment method you then will be given the chance to enter your card details in to PayPal's secure checkout in order to pay for your order. Once the payment has been made, you will then be given the opportunity to make your own PayPal account to make paying for your items in the future very easy.

Should there be a problem with payment please do let us know.

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Customer satisfaction is very important to us. If you have any problem with your order,please contact us and we will do our best to make you satisfied, please do not leave a negative feedback before we resolve your problem.
We guarantee that your issue will be solved quickly.

 

As long as you are happy with your purchase of , please leave us a positive feedback.
Your feedback is very important to us it affects our search placement on eBay. We will leave a positive feedback for you in return automatically once we receive your feedback.

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If you have any queries, please contact us via ebay. We usually respond within 24 hours on weekdays.

Thank you for visiting our ebay store!

The Bahtinov mask has become the preferred method of focusing a telescope, either visually or when imaging with a CCD camera, DSLR or webcam.They are an inexpensive tool which will allow you to achieve pin-sharp levels of focus, saving you time and improving your work. Simply place the mask over the front of your 'scope, align the scope towards a star. 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.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.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope.The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central. Because of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.There is a myth about different Bahtinov grating pattern is required for different focal length telescopes. There is no real practical reason for the use of special patterns for different telescope types and focal lengths. In fact, the frequency and angle of Bahtinov mask patterns aren't really that important. The diffraction effect is so sensitive to changes in focus, that the results are excellent regardless. Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask.



- Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task.The best focus for your telescope quickly and easily.
- Suitable for use on all types of telescope - reflectors, rafractors, Dobsonians, Mak-Cas and SCTs. They are made from precision laser cut enforced plexiglass, which is stiff and long lasting. They will never be brittle in the cold, unlike some other masks which are made from normal plastics.
- The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central. Because of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.
- They are made from 2mm thick laser cut plexiglass and the securing screws are capped with soft plastic so that they do not damage your telescope.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope. They have adjustment latitude of about 195-240mm, depending on model, in aperture making them very versatile.
- Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask (contact us if you are not sure where to measure).
Astromania Bahtinov Mask Focusing Mask for Telescopes - FM180mm for a tube outer diameter (OD) from 195mm-240mm - can be mounted with the brass screws inside or outside the drawtubeClick here to see descriptionFast ShippingGreat
Customer SupportSatisfaction GuaranteedDESCRIPTIONShipping

All domestic packages are shipped for Free (Unless other shipping method was selected during the checkout) 

  • Items may ship directly from our suppliers
  • We ship within three business days of payment, usually sooner
  • Standard FREE shipping takes between 3-5 business days
  • Expedited shipping takes between 2-3 business days
  • Overnight shipping takes between 1-2 business days

 

We do not recommend P.O. BOXES - Providing a P.O. Box may result in delivery delays, and some items we cannot ship to a P.O. Box at all. PLEASE PROVIDE A PHYSICAL ADDRESS

 

We Ship Globally using ebay's GSP, the item is sent to a logistic center in KY and shipped from there to the rest of the world.

  •  International customers are responsible for all duties and taxes
  • Contact your local authority for questions related to the amount of duties or taxes you will be responsible for

Return

In the event that you would like to return your purchase, we allow returns that are processed within the defined return date (the return date is to be found in the return policy/shipping and handling section)

Please contact us for a return authorization and the return shipping address. Please contact us for a Return Merchandise Authorization (RMA) number. We advise you to use a reputable carrier service when returning your goods. Please pack all returns appropriately.

 

  • We ship globally Via eBay's global shipping program (GSP). Thus we don't cover returns for items shipped globally. Buyers returning such items will be refunded ONLY for the item's cost and not for the shipping.
  • please check the Voltage information and make sure it matches the one in your country. In case it's not stated in the description, do ask us. 

Payment

PayPal is our preferred method of payments it's the quickest, easiest and most secure way to pay for your goods or services online. PayPal offers buyer and seller protection should there be a problem.

If you do not have a PayPal account, to get started and buy your first item with us is very easy. Simply click on the 'Buy It Now' button and follow the eBay checkout steps. Select PayPal as the payment method you then will be given the chance to enter your card details in to PayPal's secure checkout in order to pay for your order. Once the payment has been made, you will then be given the opportunity to make your own PayPal account to make paying for your items in the future very easy.

Should there be a problem with payment please do let us know.

Feedback

Customer satisfaction is very important to us. If you have any problem with your order,please contact us and we will do our best to make you satisfied, please do not leave a negative feedback before we resolve your problem.
We guarantee that your issue will be solved quickly.

 

As long as you are happy with your purchase of , please leave us a positive feedback.
Your feedback is very important to us it affects our search placement on eBay. We will leave a positive feedback for you in return automatically once we receive your feedback.

Contact Us

If you have any queries, please contact us via ebay. We usually respond within 24 hours on weekdays.

Thank you for visiting our ebay store!

The Bahtinov mask has become the preferred method of focusing a telescope, either visually or when imaging with a CCD camera, DSLR or webcam.They are an inexpensive tool which will allow you to achieve pin-sharp levels of focus, saving you time and improving your work. Simply place the mask over the front of your 'scope, align the scope towards a star. 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.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.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope.The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central. Because of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.There is a myth about different Bahtinov grating pattern is required for different focal length telescopes. There is no real practical reason for the use of special patterns for different telescope types and focal lengths. In fact, the frequency and angle of Bahtinov mask patterns aren't really that important. The diffraction effect is so sensitive to changes in focus, that the results are excellent regardless. Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask.



- Bahtinov masks take the guesswork out of focusing and even get over the seeing conditions as it is a mathematical type approach to the task.The best focus for your telescope quickly and easily.
- Suitable for use on all types of telescope - reflectors, rafractors, Dobsonians, Mak-Cas and SCTs. They are made from precision laser cut enforced plexiglass, which is stiff and long lasting. They will never be brittle in the cold, unlike some other masks which are made from normal plastics.
- The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface. This prevents slippage, whilst allowing the mask to remaining perfectly central. Because of this 3-post mounting, the mask remains centered, whilst fitting a wider range of telescopes.
- They are made from 2mm thick laser cut plexiglass and the securing screws are capped with soft plastic so that they do not damage your telescope.These high quality Bahtinov masks are adjustable to fit a wide range of optical tubes, unlike masks which are only able to fit one telescope. They have adjustment latitude of about 195-240mm, depending on model, in aperture making them very versatile.
- Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length. All you need to do is to measure your telescope tube size and choose the right size of the mask (contact us if you are not sure where to measure).
Astromania Bahtinov Mask Focusing Mask for Telescopes - FM180mm for a tube outer diameter (OD) from 195mm-240mm - can be mounted with the brass screws inside or outside the drawtube

Filed under: Eyepieces & Accessories