Farpoint Bahtinov Masks for Camera Lenses (77mm)

Farpoint Bahtinov Masks for Camera Lenses (77mm)

Focusing with your Bahtinov mask is simple. Start by snapping the Bahtinov mask into an inexpensive UV or Skylight filter that fits your camera lens. [FILTER NOT INCLUDED, MUST BE PURCHASED SEPARATELY] Center a fairly bright start in your camera and achieve a rough focus, 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 most likely be shifted to one side or the other. This is showing the defocus. Adjust the focus 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. When you achieve a symmetrical pattern, you have achieved the best possible focus. Remove the mask, center your target object and take your images!
Country USA
Brand Farpoint
Manufacturer Farpoint Astronomical Research
Binding Electronics
ItemPartNumber FP438Series
Model FP443
Size 77mm
UPCs 022099907114
EANs 0022099907114
ReleaseDate 0000-00-00

Country	USA
Brand	Farpoint
Manufacturer	Farpoint Astronomical Research
Binding	Electronics
ItemPartNumber	FP438Series
Model	FP443
Size	77mm
UPCs	022099907114
EANs	0022099907114
ReleaseDate	0000-00-00

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