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Aluminum Alloy Bahtinov Focusing Mask Caliber 80-135/100-170/145-220mm +9X Screw
the Bahtinov Focus-Mask over the end of your telescope, then locate a
bright star near your target, take a 3-5 second picture and view the
diffraction spikes. Change your focus, take another picture and again,
view your diffraction spikes. Is the center spike moving further from
center? Then change the direction your focusing and try another picture.
Watch the direction the spikes are moving and when the center spike
passes the middle of the other two spikes, change direction and fine
tune your tuning knobs until the center spike is in the middle. Your now
in perfect focus.
- The Bahtinov Mask Made of aluminum alloy, not plastic. And it has whole anodizing aluminium process
- Masks now feature 3 holes which can be attached with 3 screws to prevent the mask from falling all the way to the ground
- Perfect focusing for your CCD, DSLR or Webcam in seconds
- Light weight so you wont upset the balance on your scope
- ( 80-135mm)Suitable
for telescopes front end diameter 85mm to 120mm, Universal adaptation, 3
bolts with plastic cover allow the mask to be simply attached to any
- (100-170mm)Suitable for telescopes
front end diameter 105mm to 150mm, Universal adaptation, 3 bolts with
plastic cover allow the mask to be simply attached to any telescope
- (145-220mm)Suitable for telescopes front end diameter 150mm to 200mm, Universal
adaptation, 3 bolts with plastic cover allow the mask to be simply
attached to any telescope.
- Aluminium alloy material thickness: 1 mm
- Color: Black
- 3 X Bahtinov Mask
- 9 X Screw Kit
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Processing time:as the item description.
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A:Overseas Warehouse Local Dispatch
- From US Local Dispatch: USA: 2-6 business days , other countries: 5-14 business days.
- From UK Local Dispatch: UK: 1-5 business days , other countries: 3-8 business days.
- From DE Local Dispatch: Deutschland: 1-3 business days , other countries: 2-5 business days.
- From AU Local Dispatch: AU:2-6 business days.
B: China Domestic Dispatch
- CountryDelivery TimeWorking Days(not including holiday)5-78-1112-1415-1920-22>22Working Days+Saturday+Sunday5-910-1516-2021-2526-30>31United KingdomRate(item arrived)9.9%63.2%19.1%3.4%4.4%RefundAustraliaRate(item arrived)21.4%50%14.3%7.2%7.1%RefundFranceRate(item arrived)10.5%28.6%43.8%10.1%7%RefundGermanyRate(item arrived)11.1%22.2%30.3%20.9%15.5%RefundCanadaRate(item arrived)0%47.1%31.4%17.6%3.9%RefundSpainRate(item arrived)3.5%25%47.9%12.9%10.7%Refund
- You can pay extra shipping cost to get express delivery, such as EMS, DHL or UPS. It just takes about 5-10 business days to receive order, please contact us if necessary.
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- All items in our shop are covered by one year warranty.
stand behind every product we sell. If you're not pleased with your
purchase, we'll be happy to make an exchange or refund the product price
less S&H within 30 days of your purchase via parcel post.
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and replacement: Once the carrier has received your item, Please allow
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On Jun-01-18 at 02:33:38 PDT, seller added the following information:
Filed under: Eyepieces & Accessories