Aputure addresses the LS C300d green fringe issue with a user replaceable glass filter

The Aputure LS C300d when first introduced had a lot of people excited. It’s very bright and very flexible with the Bowens mount. Add the fresnel attachment and it’s capable of high output that I found very usable outside. If you missed it I did a hands-on review here on Newsshooter worth checking out.Aputure 300D Setup

One issue with the first production batch was a green color fringe that shows on the edge of the light. This green fringe didn’t seem to affect my images but it sure looked bad to the eye.

You could see the green fringe on the edge of a softbox or the included modifier. Aputure was quick to respond to the issue and notified customers that a fix was in the works. The solution was a self-serviceable replacement glass filter.

The green tint on the glass can be clearly seen next to the updated version on the left.

Let’s have a look at the results before & after replacing the glass filter. If you’re too impatient to find out the results, the green fringe is no more and Aputure has even improved the CRI scores!

Aputure Light Storm 300d with the original glass filter

300d beauty dish green
300d with original filter and beauty dish without front diffusion attached. Camera set to 5500K
300d original glass filter shows green
300d with original filter.

Aputure Light Storm 300d with the replacement glass filter

300d new glass filter shows no green
300d with the new glass filter. No more green fringe.

Here is what it looks like with the new filter installed. No more green fringe!

300d new glass filter
Freshly installed replacement glass filter

It took some time for the engineers to fix the color issue, but to my eye and some tests, it looks like it fixes the issue plus improves on its original CRI score. Aputure is shipping the 300d with the new glass filter installed. If you bought from the first batch Aputure will send you a kit to replace the filter for free. It was easy to do. Well… unless you’re shooting a video of the install 🙂 It only entailed removing five screws in total and the instructions were included in the upgrade kit along with a special screwdriver to remove the screws.

Color test with original filter

Just to make sure all is good I did a test with the Sekonic C-700. Here is the before and after ratings.

BEFORE APUTURE 300D REF_01_5223K_ColorRendering
Reading with original glass filter


APUTURE 300D REF_01_5223K_SpectralDistribution

APUTURE 300D REF_01_5223K_WhiteBalance

White balance with original filter has a warm push of approximately 400K.

Color test with new replacement filter

The average CRI is 92.4. The extended CRI with the old glass filter was 89.68


NEW 300Dfilter-55K_01_5583K_ColorRendering
With the replacement filter, the CRI ratings improved.

With the new filter attached the CRI readings improved. I got an average CRI of 96.5 and an extended CRI of 94.32 from 89.68. Not bad at all!



White balance is also improved with the slight warm push of 17K as opposed to before. This is much improved.

Let’s compare the pair

Improved CRI scores with the updated filter
The green spike can be clearly seen with the original filter compared to the new

If you own a first production batch 300d fixture and want to upgrade the front glass filter for free yourself. Fill out the Aputure online form.

It’s great to see Aputure address the issue early on and provide an easy solution where the customer can service the light themselves.

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