FREE SHIPPING

On Hundreds of Products details ›

CALL US TOLL FREE 800-266-9590

Farpoint Bahtinov Mask for Refractors or Newtonians with 3.5" to 6.5" Front Diameter - FP401

SKU: FAR-FP401

This item is in stock and typically ships in 1 day or less.

One of the many benefits to becoming a customer of High Point Scientific is that you receive Unlimited Tech Support on all of the products you purchase from us.  We understand that many of our products are technical in nature and require support.  Rest assured that our team of Telescope and Telescope Accessory experts will be standing by (800.266.9590) to support you for as long as you own one of our products!  

Our price: $17.00
Bread Checkout
 

Farpoint Bahtinov Mask
for 3.5" - 6.5" OD Telescopes and Dew Shields


The Bahtinov Mask makes it easy to focus your DSLR camera, CCD camera, or webcam when imaging the night sky. The Farpoint Astro Medium Bahtinov Mask works with any telescope with an outside diameter of between 3.5" and 6.5". Measure your diameter from the end of the tube or dew shield.



How to Use the FarPoint Bahtinov Mask



Attach a camera to your telescope, center a fairly bright star and achieve rough focus. Then place the mask over the front aperture of your telescope by “hanging” it on the plastic screws from the front of your telescope or dew shield. It is recommended that you pick an orientation for the mask and then use that same orientation each time. This way you will get used to the way a star looks when it is inside or outside of focus. Take a short exposure. The image of the star will show diffraction spikes. The “center” set will most likely be shifted to one side or the other. What you are shooting for is a symmetrical diffraction pattern, where the center spike is actually centered over the star and the spikes to either side are symmetrically spaced as well.



Adjust the focus of the telescope and re-expose the star to show you the diffraction spike pattern once again. Repeat the process until the central diffraction spike is centered against the star and the other spikes. When a symmetrical pattern is achieved, the best possible focus is then reached. Simply remove the mask, center the target object and take amazing, sharp images!



PS: The blue strap in the main photo is not included. The manufacturer just used it to hold the mask upright for the photo.

Description
Description

Farpoint Bahtinov Mask
for 3.5" - 6.5" OD Telescopes and Dew Shields

The Bahtinov Mask makes it easy to focus your DSLR camera, CCD camera, or webcam when imaging the night sky. The Farpoint Astro Medium Bahtinov Mask works with any telescope with an outside diameter of between 3.5" and 6.5". Measure your diameter from the end of the tube or dew shield.

How to Use the FarPoint Bahtinov Mask

Attach a camera to your telescope, center a fairly bright star and achieve rough focus. Then place the mask over the front aperture of your telescope by “hanging” it on the plastic screws from the front of your telescope or dew shield. It is recommended that you pick an orientation for the mask and then use that same orientation each time. This way you will get used to the way a star looks when it is inside or outside of focus. Take a short exposure. The image of the star will show diffraction spikes. The “center” set will most likely be shifted to one side or the other. What you are shooting for is a symmetrical diffraction pattern, where the center spike is actually centered over the star and the spikes to either side are symmetrically spaced as well.

Adjust the focus of the telescope and re-expose the star to show you the diffraction spike pattern once again. Repeat the process until the central diffraction spike is centered against the star and the other spikes. When a symmetrical pattern is achieved, the best possible focus is then reached. Simply remove the mask, center the target object and take amazing, sharp images!

PS: The blue strap in the main photo is not included. The manufacturer just used it to hold the mask upright for the photo.

Specifications
Specifications
Model Number FP401
Focus Masks & Caps Known to Fit Telescopes w/ Outside Diameter Between 3.5" & 6.5" (88.9 mm & 165.1 mm)
Warranty One (1) Year
  • Farpoint Bahtinov Mask for 3.5" - 6.5" Refractors or Newtonians
  • Farpoint Bahtinov Mask for Refractors or Newtonians with 3.5" to 6.5" Front Diameter - FP401
  • Farpoint Bahtinov Mask for Refractors or Newtonians with 3.5" to 6.5" Front Diameter - FP401
Our Customer Commitment
  • Fast Shipping, Same or Next Day: You made the commitment to purchase, now you want that new item fast, we get it! At High Point all in stock orders ship within 24 hours, pending internal credit card approval.Read more ...
  • Unlimited Tech Support Forever: One of the many perks of being a High Point customer is that you get access to our tech support team forever! We are astronomers at heart and truly enjoy helping fellow amateurs achieve success in the field! Read more ...
  • 30 Day Return Policy: Ordered the wrong product? Don't worry, we'll take the majority of our products back within 30 days of the purchase date.We want to get you into the observing setup that bests fits your needs. Read more ...
  • Guaranteed Price Match: Call or email us if you find a better price on a product! Provide a link for our team to confirm the price and within a matter of seconds you'll have a price match providing the re-seller is within the USA and authorized by the manufacturer to sell the product of interest. Read more ...
  • We're Your Connection To The Manufacturer: In the event there is a warranty issue with a product purchased from High Point, we will serve as the liaison between you and the Manufacturer. The net result is faster, more attentive service from the Manufacturer and an enhanced customer experience. Read more ...

Please wait...