Moondog Labs Filter Holder – First Look


Moondog Labs has long been a player in the smartphone camera add-on market. They have several outstanding products. So when we found out about the Multi-Camera Filter Mount we immediately scraped together our hard-earned cash and ordered one. Apparently lots of other people did too because the product has been on backorder. But good news, it arrived this week and here is a very quick, first look and our first impressions.

If you are a serious photographer who uses a smartphone camera, you may have wished there was an easy way to mount some of your professional filters like a circular polarizer over your smartphone lenses. If you shoot video with a smartphone you know you need an ND filter to control exposure. Up until now, there have been ways to accomplish this with add-on devices, but most of them felt a bit kludgey. The Moondog Labs 52mm Filter Holder for Smartphone Cameras does not – feel kludgey that is.

Using this device, you can attach any 52mm photo filter to your smartphone camera. We’ll use it for CPL and ND, but you may have other filters you want to use.

The secret to this device is its conformity to the M-Mount standard. If you use Moment lenses (and we do) then you no doubt already have a case with an M-Mount. The bayonet style attachment is becoming a standard in the industry and Moondog Labs has taken good advantage of that fact with this product. You will need a special phone case that offers this M-Mount. Moment, Rhinoshield, Nomad or Sirui cases are available with an M-Mount. So far we use Moment and Nomad cases.

Using this adapter, you can attach your 52mm filter and it will cover all three lenses for instance on an iPhone 11 Pro Max. It works with almost any cellphone, but most impressively works with all the new multi-camera lens phones like the 11 Pro Max.

You can use any 52mm filter. Moondog Labs sells filters as do many other companies. Chances are you may already have a 52mm filter laying around. You can also use step down rings to make your larger than 52mm filters work with this system.

The Multi-Camera Filter Mount is particularly beneficial for covering the three cameras of iPhone 11 Pro / Pro Max. This also makes it the perfect hardware to pair with FiLMiC’s latest app release DoubleTake which transforms your iPhone into a multi-cam studio allowing you to capture video from two cameras at the same time.

You can get more information at the Moondog Labs website.

We have also embedded the company’s video explainer to give you a better idea of how the filter holder works.

We’ll be making a short video with and about this tool soon. Check back often here at FOM for updates.


If you find yourself (as we often do) wanting to use your camera phone without mounting an accessory lens, but still want to get good imagery, this is the best way to do it.

At $35 it’s fairly priced. The build-quality is very good. And the company’s reputation is stellar. HIGHLY RECOMMENDED.

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Scott Bourne

Scott Bourne (ASINWP) is a professional wildlife photographer, filmmaker, author and lecturer who specializes in birds. He’s been involved with photography for more than four decades and his work has appeared in more than 200 publications.

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