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77mm-DSLR-Camera-filter-unmounted-Bahtinov-Mask-FP443-0

77mm DSLR Camera filter unmounted Bahtinov Mask, FP443

$12.95 $12.95 (as of March 4, 2017, 3:54 pm)


Bahtinov Focusing Mask for DSLR Camera Lenses with 77mm filter threads
Snaps into a UV or Skylight filter [NOT INCLUDED]
Works with all DSLR cameras

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Description

Focusing with your Bahtinov mask is simple. Start by snapping the Bahtinov mask into an reasonably priced UV or Skylight filter that fits your camera lens. [FILTER NOT INCLUDED, MUST BE PURCHASED SEPARATELY] Center a slightly bright start in your camera and achieve a rough center of attention, then loosely screw the filter holding the mask onto your camera lens. Take a short exposure. The image of the star will show diffraction spikes. The “center” set will in all probability be shifted to one side or the other. This is showing the defocus. Adjust the focal point of your camera and re-expose the star, once again showing the diffraction spike pattern. Iterate the process until you get the central diffraction spike centered against the star and the other spikes. While you achieve a symmetrical pattern, you have achieved the most productive imaginable center of attention. Put off the mask, center your target object and take your images!
Bahtinov Focusing Mask for DSLR Camera Lenses with 77mm filter threads
Snaps into a UV or Skylight filter [NOT INCLUDED]
Works with all DSLR cameras
Best for focal lengths greater than 100mm
Made in the us by Farpoint Astro

Frequently Bought Together

Price for all: $47.13

Additional Information
Binding

Electronics

Brand

Farpoint

EAN

0022099907114

EANList

0022099907114

Label

Farpoint Astronomical Research

Manufacturer

Farpoint Astronomical Research

Model

FP443

MPN

FP443

PackageDimensions

200, hundredths-inches, 900, hundredths-inches, 19, hundredths-pounds, 600, hundredths-inches

PackageQuantity

1

PartNumber

FP443

ProductGroup

Photography

ProductTypeName

CAMERA_LENS_FILTERS

Publisher

Farpoint Astronomical Research

Studio

Farpoint Astronomical Research

UPC

022099907114

UPCList

022099907114

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