Shopping cart
is empty

Home > Astrophotography > Masks > Focusing Masks > Farpoint > Snap-in > Farpoint Bahtinov snap-in focus mask for DSLRs with 58mm filter diameter

Farpoint Bahtinov snap-in focus mask for DSLRs with 58mm filter diameter

Product no.: 52157
Manufacturer: Farpoint

$ 22.90

incl. VAT
plus shipping costs

Product can be shipped as of 01.11.2022
Order now!

+ lead time
This product is available in the following variants:
Diameter (mm) Price
52 $ 22.90
58 $ 22.90
62 $ 22.90
67 $ 22.90
72 $ 22.90
77 $ 22.90
82 $ 22.90
Farpoint Bahtinov snap-in focus mask for DSLRs with 58mm filter diameter
Farpoint Bahtinov snap-in focus mask for DSLRs with 58mm filter diameter
Farpoint Bahtinov snap-in focus mask for DSLRs with 58mm filter diameter
Product description
Specifications
Customer reviews

Product description:

Similar to illustration. (bracket not included)

Bahtinov focus mask

The focus mask is used to facilitate accurate focusing when doing astrophotography.

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!

The Bahtinov focus technique works best with longer focal lengths. It gets less useful with shorter focal lengths. The practical useful limit is around 100mm focal length or longer.

26.09.2022
We ship worldwide
Currency
Service
Advice
Contact
Universe2Go