Farpoint Bahtinov Masks for Camera Lenses (Cokin P)

Farpoint Bahtinov Masks for Camera Lenses (Cokin P)

Focusing with your Bahtinov mask is simple. Start by sliding the Bahtinov mask into a Cokin P filter holder with camera lens mount. [COKIN P FILTER HOLDER 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 FP475
Size Cokin P
UPCs 022099907138
EANs 0022099907138
ReleaseDate 0000-00-00

Country	USA
Brand	Farpoint
Manufacturer	Farpoint Astronomical Research
Binding	Electronics
ItemPartNumber	FP438Series
Model	FP475
Size	Cokin P
UPCs	022099907138
EANs	0022099907138
ReleaseDate	0000-00-00

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