Bahtinov Focus Tool for DSLR Camera Lens

Bahtinov Focus Tool for DSLR Camera Lens

$29.99

Shipping calculated at checkout.

Never worry about blurry stars again. Get perfect focus for astrophotography every time with a bahtinov focus tool.

If you've ever spent hours trying to manually focus your camera on the stars at night, you know the struggle. A bahtinov focus tool will cut your setup time down to mere minutes with ease. 

the lagoon Nebula

The simplest, easiest to use Bahtinov Focus Tool for camera lenses.

 

Clips to the Exterior of the Lens

The tool clips to the exterior of the lens, allowing for easy mounting and dismounting, even in the dark. Removing the mask won't bump your focus ring.

Three sizes are available to fit lenses with an exterior diameter between 60 and 120 mm. Be sure to measure the exterior diameter of the lens or dew shield for the best fit. 

the orion nebula

Article: How to use a Bahtinov Focus Tool with a DSLR camera

Bahtinovs are easy to use. Before attaching the device, aim your lens or telescope at a bright star and manually adjust the focus of your lens or telescope until it looks close to focus. Then, gently attach the bahtinov. The mask will diffract the light into three spikes. Adjust focus until the middle spike is centered, then carefully remove the mask to begin viewing.
This product is NOT a medical device.

Bahtinov Focus Tool for DSLR Camera Lens
Bahtinov Focus Tool for DSLR Camera Lens
Bahtinov Focus Tool for DSLR Camera Lens
The Milky Way Core
Soft tips to protect your lens
The Lagoon Nebula
Bahtinov Focus Tool for DSLR Camera Lens

Customer Reviews

Based on 31 reviews
84%
(26)
13%
(4)
3%
(1)
0%
(0)
0%
(0)
A
Anonymous
Gets the job done.

Works great on DSLR telephoto lenses. Definitely recommended.

B
Ben Gedzyk
Good news and bad news

This mask works good as intended. No complaints there. The problem I have is that it came to me dinged up, thin metal ring has dents, and there is some sort of adhesive smeared all over the back side of the mask. I tried to clean it but it won’t come off. Poor quality control. I emailed Johannes Scientific about this and never heard back. It functions well but looked used and abused. It did come sealed so it’s a manufacturer’s issue. Still, Johannes should pay closer attention to what they sell.

M
MIGUEL DUARTE
It really works with DSLR

This Bahtinov mask really works with a DSLR paired with a telephoto lens. I have tested it with my Nikon D5500 and the Nikkor AF-S 300mm F/4 ED-IF with and without the 1.4x teleconverter. The refraction spikes are clearly visible in magnified "Live View" and correct focus can be achieved with no issues. This is an improved design with very thin pattern lines.

G
George B
Bahtinov mask for smaller diameter lenses

I am doing astrophotography with my Canon L series lenses and focusing can be a problem when not using a DSLR or Mirrorless. I have a large mask for use with my 400mm f4 DO which works fine but with the 100-400mm zoom or my 85 f1.8 the grating was overly wide and didn't work well. I got the JS mask for 80-120 and it is ideal for the shorter focal lengths. Very good quality and a tight diffraction grating.

S
Sean
Works very well

The filter is well made, easy to use. It’s made getting that perfect focus for these night shots bloody easy now.

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