Easy Focus - Star Focus Filter  - for Stars and Planetary Photography!  - The best gift for you and your loved ones 🎁
Easy Focus - Star Focus Filter  - for Stars and Planetary Photography!  - The best gift for you and your loved ones 🎁
Easy Focus - Star Focus Filter  - for Stars and Planetary Photography!  - The best gift for you and your loved ones 🎁
Easy Focus - Star Focus Filter  - for Stars and Planetary Photography!  - The best gift for you and your loved ones 🎁
Easy Focus - Star Focus Filter  - for Stars and Planetary Photography!  - The best gift for you and your loved ones 🎁

Easy Focus - Star Focus Filter - for Stars and Planetary Photography! - The best gift for you and your loved ones 🎁

Regular price Sale price$59.99
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  • Free worldwide shipping above $39
  • In stock, ready to ship
  • Inventory on the way

HANDLE TIME

All orders will be scheduled for shipment in 1 to 3 business days, excluding holidays.

COUNTRIES

We ship worldwide. 

WAREHOUSES

Currently, we have 4 warehouses.

🇺🇸 US warehouse, for our US users, parcel usually arrives in 1-7 days.

🇪🇺 EU warehouse, for most EU countries, parcel usually arrives in 1-7 days.

🇦🇺 AU warehouse, for our Australia and New Zealand users, parcel usually arrives around 1-7 days.

🇨🇳 CN warehouse, for all countries, parcel arrives in 4-7 or 8-20 days, please check below for details.

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FAQ

Q 1:  What is the shortest, (widest) focal length this will work with? 14 MM, 20MM, 35MM, 50MM?

A: Yes, this focus filter can work well with all the wide lenses mentioned above, it will perform better on zoom lenses. The longer the focal length, the better the performance.

Q2 : I have a Nikon 24-70 that has an 82mm thread for filters. Does the 82mm have a thread to fit my lens?

A: Yes, the filter has the thread to fit into the lenses.

Introduction

Star Focus Filter is used to work with cameras to achieve precise focus on the stars,
Focusing a camera lens in the dark is always a difficult thing in astrophotography. Through the Bahtinov Mask on the filter, Star Focus Filter can help the camera get an accurate focus on stars.

Does it work with zoom lens?

Yes, it's ok for zoom lens. The longer the focus length the better the performance.
Below video is tested with indoor red led, Canon 600D, Canon EF-S 18-135mm f/3.5-5.6 @18mm


How to Choose a Suitable Adapter ?

 

How to Use Star Focus Filter(video)?

Method 1

  1. Mount the Star Focus Filter onto your camera.
  1. Turn on the live view mode, adjust the ISO to the biggest (ISO 1600 or above), and set the shutter speed to 10s or more.
  1. Adjust the frame and make sure the bright star or light source is in the middle of the frame. It is recommended that you look for a bright star of magnitude 1 to focus on.
  1. Magnify the frame and adjust the focusing rings at the same time until three fine spike lines show out in the frame.
  1. Rotate the focusing ring to make the three spikes intersect at one point. This the when the precise focus is achieved.

Method 2

If you can't find a brighter star or the lens aperture is too small, you can take several testing pictures to get the focus.
  1. Mount the Star Focus Filter onto your camera.
  1. Adjust the focus rings to get an infinity focus
  1. Set the high ISO and short exposure (several seconds), and take one testing shot
  1. Check the three spike lines in the frame, if the central spike is closing to the left, screw the focus ring to the right. If the central spike is closing to the right, screw the focus ring to the left.
  1. Take a second testing shot, and repeat step 4 until three spikes intersect at one point. Then a precise focus is achieved.
 Note: Hand holding the filter, then it can work with the lens without the adapter 

 Tips:

  1. It will need to position the bright star in the middle of the frame, choosing the bright star of magnitude 1 or close to the magnitude 1
  1. For the wide lenses, please turn the aperture to the biggest
  1. The filter is not wear-resistant, please store it in a filter case after use. If there is dust or oil, please use an air blower and neutral detergent to remove them
  1. Do not place it in high temperature environment
Recommended Apertures with different focal lengths
Focal Length (MM)
10-11
12
14
16
18
20
24
28-600 or longer
Aperture (F)
1.2-2.5
1.2-2.8
1.2-3.5
1.2-4.0
1.2-4.5
1.2-5.0
1.2-5.6
1.2-5.6 or lower

Specification

Compatible lens
82mm
Camera Adapter Rings
49mm、52mm、55mm、58mm、62mm、67mm、72mm、77mm
Weight(g)
without adapter ring 20g 
with adapter ring 30.3g

 

For the Option" star focus filter +all adapters below" , it will come with one 82mm focus filter and 8 adapters- 49mm+52mm+ 55mm +58mm + 62mm + 67mm  +72mm + 77mm.

Note: Star Focus Filter can work with other lenses with the help of camera adapter rings

Customer Reviews

Based on 65 reviews
75%
(49)
20%
(13)
0%
(0)
2%
(1)
3%
(2)
Reviewer avatar
Tony D (Hitchin, GB)
One filter for all DSLR astro photography?

The Dydimium filter is very effective at reducing the impact of light pollution. Coming with an optional range of adaptors for different lens sizes means it fits every lens I have bar one - the ultra-wide angle fast lens that has a bulbous front!
In my area we certainly need something like this with major housing developments within 15Km in all directions. Just why we need to shed so much artificial light upwards by wasting so much energy is beyond my comprehension.

Trying to image something like the Comet C/2023 A3 Tsuchinshan-ATLAS, which is never that high in the sky at latitudes above 50º, was always going to be a challenge in my location but this filter certainly helped when I fitted it to my 70-200mm, f/2.8 Sigma zoom lens. I would recommend that you compensate for the reduction in light passing through by increasing your ISO by up to +1EV if shooting with a full frame camera, maybe +1.5EV for an APC-S sensor.

S
Stephen Potts (New South Wales, AU)
Star focus filter+ Z mount

Have not used yet but delivery process was very efficient and effective.

L
Lee Davies (Hamilton, NZ)
Sharp focus

My only regret with this mask is not getting it sooner. To know that I've nailed focus means I know the nights shots are going to be usable. I can check focus through the night rather than hoping it hasn't drifted or been knocked out.

M
Marino Rodriguez Serrano (Madrid, ES)

Star Focus Filter

M
MICHAEL DIPAY (Brampton, CA)
Focusing at night time is now easier

I always have the problem of focusing at night with my APS-C camera and with my aging vision. I can hardly find that sweet spot of tiny star on my focus. With the aid of Easy Focus - Star Focus Filter I can easily find that spot. Thanks MSM.

K
Ken Brent (Mountain View, US)
MSM Accessories

While I do not own the MSM rotator due tot the weight of my gear, I have purchase the MSM polar scope laser attachment for my iOptron rotator. It fit my device perfectly and is of high quality. I have also purchased the Bahtinov mask set for my DSLR which is also of very high quality and works well.

R
Richard Flapper (Amsterdam, NL)
Excellent filter

Having had issues with getting stars correctly in focus and having bought other bathinov masks that were primarily made for telescopes I decided to give this filter a try. And it works like a charm. One thing though. It’s best not to screw on the filter during focusing. When unscrewing the filter it generally unfocuses the image. I just hold it before the lens and then focus the image. Works like a charm!

J
Jacco de Weger (Utrecht, NL)
Great tool for focusing!

Works great. Reasonably fast delivery

T
Ted Hill (Murrieta, US)
Easy Focusing on Stars!

I used to struggle getting fine focus on stars but not anymore. The MSM Star Focus Filter is easy to use and nails focus every time, I highly recommend it!!

M
Massimo Bernardi (Novara, IT)
Very good

More focusing precision respect "eye on screen". I use its on my 135 - 200 and 300 lens. Very good stuff.