Designed for use with the Canon Drop-In Filter Mount Adapter EF-EOS R, this Drop-In Variable Neutral Density Filter A is an intuitive and sleek means for using a variable neutral density filter in conjunction with an adapted lens, especially those lenses lacking traditional filter threads. This variable ND filter is permanently installed within a drop-in holder and has an integrated wheel for adjusting the rotation position to alter the ND effect.
The variable ND filter provides 1.5 to 9 stops of adjustment and creates a darkening of the entire image for photographing with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the filter, helping you to predetermine the additional exposure length required. By increasing your aperture or slowing your exposure time, you are able to control depth of field and convey movement more easily.
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Key Features
- Reduces Exposure 1.5 to 9 Stops
- For Drop-In Filter Mount Adapt. EF-EOS R
- Integrated Filter Rotation Wheel
- Reduces Exposure, Darkens Entire Image
Designed for use with the Canon Drop-In Filter Mount Adapter EF-EOS R, this Drop-In Variable Neutral Density Filter A is an intuitive and sleek means for using a variable neutral density filter in conjunction with an adapted lens, especially those lenses lacking traditional filter threads. This variable ND filter is permanently installed within a drop-in holder and has an integrated wheel for adjusting the rotation position to alter the ND effect.
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Canon 3446C001 Overview
UPC: 013803318043
Canon 3446C001 Specs
| Filter Type | |
| Exposure Reduction | |
| Size | |
| Front Accessory Thread / Bayonet | |
| Filter Material |
Packaging Info
| Package Weight | |
| Box Dimensions (LxWxH) |
Canon 3446C001 Reviews
It's terrible, but it's better than nothing.
By Nick
Rated 2 out of 5
Date: 2023-02-07
Great that this exists. However, there's no friction on the wheel. Meaning if you don't tape it in place it will move on you. And even taping it in place is quite a challenge because it'll slip as you're taping it. This could be an excellent tool unfortunately it wasn't thought through. At full strength it does have optic issues, but that's true of many V ND filters. That doesn't bug me too much. Looking forward to upgrading to a 3rd party filter, the idea of this is excellent but the execution makes it ruin more shots than it makes.
Pricey but a nice accessory addition
By Ron
Rated 5 out of 5
Date: 2021-11-02
Im not sure that I would use it at a full 9stops as it seems like that image would require a lot more processing and color correction in post but so far I am happy with the results it gives me when I need to use it and happy to have it in my kit. Possibly a filter kit including all the filters availavble to that adapter for purhcase would be more convenient and cheaper?
See any errors on this page?
Why is it MORE expensive to buy just the filter ...
Why is it MORE expensive to buy just the filter without the adapter included?
While Canon sets the MSRP on their items, as of the time/date of this reply, the cost of the Canon Drop-In Variable ND Filter A (1.5-9 Stop), BH #CADIVNDFA, and the Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter, BH #CAMAEFRFDIND, on our website are currently the same price. However, I would simply recommend that if you are certain that you want the Variable ND Filter, as it is the most expensive of the filter options that are compatible for use with the Canon Drop-In Filter Mount Adapter EF-EOS R, I would simply recommend to purchase the adapter kit that comes with the Variable ND filter, the Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter, BH #CAMAEFRFDIND.
Date published: 2019-08-24
Does this have the option to not use any ND, ...
Does this have the option to not use any ND, while keeping the filter in the adapter to avoid dust seeping into the hole?
You will need to add this clear filter to the drop in filter slot in the Canon EF RF filter adapter. This filter will make sure no dust gets in the camera. https://www.bhphotovideo.com/c/product/1434115-REG/canon_3444c001_drop_in_clear_filter_a.html
Date published: 2022-03-15
I have a RF 24-70mm lens, do I just place this ...
I have a RF 24-70mm lens, do I just place this acessory behind the lens? Would it fit?
No, this filter system is for use in the Canon EF to RF lens adapter that takes drop in filters.
Date published: 2021-03-04
Is there a non-variable ND drop in filter for ...
Is there a non-variable ND drop in filter for this mount? Like a set of multiple NDs? I can't stand the color shift and increased contrast variable NDs create. I'd much prefer to just carry around a few drop in's at varying ND levels
Awesome! Thank you, I’ll check our breakthrough.
Date published: 2020-08-19
does it let you know what stop its set at ?
does it let you know what stop its set at ?
It has reference marks.
Date published: 2021-04-17
Does the variable ND drop in filter fit in the ...
Does the variable ND drop in filter fit in the Canon ef -R 0.71 speed booster?
No but that's great idea. Speed booster with a drop in filter.
Date published: 2022-06-27
How big is the actual filter? Will this drop in ...
How big is the actual filter? Will this drop in to the 52 mm filter slots at the back of Canon telephoto lenses?
I don't have the actual dimensions but the filter is permanently mounted in the holder and it will only fit into the canon drop in filter mount adapter. See BH #CAMAEFRFDIND.
Date published: 2019-08-08
What is a recommended storage case for the filter ...
What is a recommended storage case for the filter when not in the adapter?
A Domke 11x11" Color Coded Protective Wrap (Gray), B H # DOPW11G would be a suitable option to store this filter.
https://bhpho.to/3t8GR0O
Date published: 2021-03-11