Frequently Asked Questions

The Session filters are just over 1mm thick (1mm for the glass, plus the adhesive), and fit into most mounts.   If you have a mount that is designed to have the GoPro *Session* inserted from the side and it fits very tight, then it may not be possible to insert the camera with a filter attached.   You can try putting the filter on after the camera is already in the mount if there  is room.  As a last resort, you can try cutting just enough of the TPU on the front away to make room to get the lens on.

The best mounts and protectors for the session are rear-entry.   Anything like this one works really well and protects the filter.

The Hero filters will fit in any mount that does not have material up against the front of the lens.

The adhesive is made to stick to clean glass.  If you do not put the filter right on the lens of the camera, then it might be partially stuck to the plastic casing of the camera, which could cause it to fall off.   If you live in a very hot and humid climate  or if you are finding that it is not sticking properly, here are some tips:

1. Make sure that the camera glass is perfectly clean - use 99% isopropyl alcohol to clean your camera lens and make sure it is completely dry prior to application, and give it a good push on around the edges (don't push the middle, it might break!).  Every once in a while, push the filter towards the lens around the edges just to make sure it is sill attached properly.

2. Take the adhesive off the filter and clean it with tapwater, then let it completely dry. If the adhesive is coming off the filter itself (and sticking to the camera lens), then also clean the back of the filter around the edges (where the adhesive goes) with isopropyl alcohol, let it dry and carefully put the adhesive back on.

The filters are made of hardened glass, so they resist breakage more than regular glass filters.  That being said, they are made out of glass, so if  you crash and they hit something hard enough, they can break.  

The mount that you use can make a huge difference. Mounts that have "tabs" sticking out will protect your filter much better than ones without.  I use these types of mounts and do not get breaks:  https://www.thingiverse.com/thing:1893078

Read the full application instructions here:   https://camerabutter.com/pages/application-instructions

Read the full explanation here:  https://camerabutter.com/pages/nd-filter-tips - it explains both a "set and forget" way and an "expert" way of setting up your camera to get the most out of the filters.

If your adhesive gets dirty or worn from removing and re-applying, simply remove it from the filter, wash it with tapwater, rubbing it to remove dirt/grease and let it dry completely before carefully re-applying it to the filter.  If it gets ripped or wrecked somehow, we sell replacement adhesive squares in the store.

Many lens protectors such as the ones that we sell have anti-stick coatings on them to repel dirt and grease.  Unfortunately this will also cause the filter to not stick properly.  It is advised to not use lens protectors between the filter and the camera for this reason.  The filter should provide adequate protection for your lens.

No!  The adhesive is only around the edges of the filter and does not get in the way of the image.  What's more, the adhesive is black, so it stops light from getting in through the sides.

Currently, I ship to most places including North America, Europe, South America, Australia and parts of Asia.   If you live in a place that does not show up in the shipping list, please contact me via the contact form and I will arrange it for you.  Some places do not show up on the shipping form because the shipping calculator cannot automatically calculate shipping to that area.

Typically orders will go out the same business day or next business day.

ND filters can do a few things that are beneficial:

- They can reduce or eliminate jello from your footage cause by vibration

- They can add motion blur to give your motion a more natural and cinematic feel (movies use motion blur)

- They can allow you to use a fixed shutter speed so your GoPro does not keep changing thew exposure/brightness over the course of your clip