Focusing Mask Bahtinov for DSLR Objectives 55mm

Name: Astroprints Focusing Mask Bahtinov for DSLR Objectives 55mm
Brand: Astroprints
Price: 17.9 USD

$ 17.90 incl. VAT plus shipping costs

in stock
ready for shipping in 24 h + lead time

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Find the focus with a Bahtinov mask
Easy to mount, lightweight plastic
Particularly inexpensive thanks to 3D printing

Product questions?

advice for Astronomy

This product is available in the following variants:
	Diameter (mm)	Price
	55	$ 17.90
	58	$ 18.90
	62	$ 19.90
	67	$ 20.90
	72	$ 22.90
	82	$ 23.90
	86	$ 24.90
	95	$ 25.90
	105	$ 26.90

Product description

The focusing mask according to Pavel Bahtinov facilitates precise focusing, which is particularly important in astrophotography. The mask is attached to the front of the tube or lens. When looking at a star, it produces a pattern of rays. When the long ray intersects the two slightly shorter rays symmetrically in the middle, the focus is correct. Thanks to its many opening slits, the Bahtinov mask can also be used with relatively dim stars. This is an advantage over the classic Scheiner mask.

A Bahtinov mask should actually be calculated separately for each aperture ratio. However, experience shows that one mask can be used very effectively for an entire aperture range.

The item is made from PETG using a 3D printing process and is dimensionally stable up to 80°C.