Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in)
Canon Circular Polarizer - Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun.
If you're out walking on a lovely day - in the mountains or at the beach - and you want to get a fabulous shot of a cloud-filled sky or make the water seem more saturated, then a polarizer is the way to go. This filter is the best way to make the clouds stand out, increase or decrease the saturation of the ocean or increase or decrease the reflection off the water. You can also use this filter when shooting into glass or windows since it will, again, either increase or decrease reflections.
If you're shooting black and white and want to simulate a threatening storm, try throwing on a #25 Red filter. The vista will take on the appearance of an imminent, ominous storm.
Along with a UV or Skylight Filter, a polarizing filter should be a part of everyone's gear bag. It can turn a run-of-the-mill image into a stunning, creative photo by increasing color saturation.
Note! Circular polarizers are specifically designed for use with auto-focus SLR cameras (They will also work on manual systems and video cameras without problems)
- This filter eliminates ultraviolet rays to remove haze from outdoor shots as well as polarizing the light to remove reflections, and increase color saturation, without affecting the overall color balance
| Type | Circular Polarizer |
| Size | 52mm (Rear Drop-in) |
| Grade | Not Applicable |
| Filter Factor | Between 2.3 and 2.8 (approx. +1.3 stops) |
| Multi-Coated | Not Applicable |
| Rotating | Yes |
| Effect | Removes reflections and increases color saturation without affecting the overall color balance |
| Application | Nature, travel, outdoor photography |
| Color Temperature | Not Applicable |
| Construction | ColorCore Glass |
| Front Filter Thread Size | Not Applicable |
| Front Lens Cap Size | Not Applicable |
REVIEW SNAPSHOT®
by PowerReviews(based on 29 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Easy to use (19)
- Clear optics (18)
- Firm mount (16)
- Strong construction (10)
- Consistent effect (5)
Cons
Best Uses
- Color correction (9)
- Image manipulation (7)
- Reviewer Profile:
- Photo enthusiast (8), Semi-pro photographer (7), Enthusiast (5), Pro photographer (3), Semi-professional (3)
- Was this a gift?:
- No (10)
Most Liked Positive Review
Useful Accessory
A polarizer is a useful accessory for a super-telephoto, especially for distance shots such as landscapes of mountains because it can eliminate a lot of the stray light reflected from atmospheric haze and pollution.<...Read complete review
A polarizer is a useful accessory for a super-telephoto, especially for distance shots such as landscapes of mountains because it can eliminate a lot of the stray light reflected from atmospheric haze and pollution.
It works well on photos taken in a direction perpendicular to the sun but is not effective at reducing haze on photos lit from in front or behind. Because the front of super-telephotos do not accept screw on filters this is really your only practical option if you want to use a polarizer.
To use simply squeeze the two buttons and lift to remove the OEM lens filter holder and insert the circular polarizering assembly the same way. There is small fingerwheel at the top of the assembly that rotates the polarizer as the wheel is turned and the effect is visible in the viewfinder. I found it took more rotations of the fingerwheel to rotate the filter than I liked but it's not a major problem.
I think the cost is quite reasonable as the filter assembly appears to be built to the same high standards as Canon's line of super-telephoto lenses and the polarizer comes inside a handy and well made plastic case. I have not appraised the filter from an optical perspective but I assume it does not degrade the image quality as it replaces the clear glass filter that came with the lens.
VS
Most Liked Negative Review
Could be stronger
As many of my wildlife shots with the Canon 500 f/4 lens are on water, a polarizer is a must. I find this convenient, but lacking the more pronounced effects of B+W...Read complete review
As many of my wildlife shots with the Canon 500 f/4 lens are on water, a polarizer is a must. I find this convenient, but lacking the more pronounced effects of B+W CPLs on other lenses. I am considering sending this in for the substitution of a stronger polarizer element.
REVIEWS
Reviewed by 29 customers
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Displaying reviews 1-20
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Pros
- Easy To Use
- Firm Mount
- Strong Construction
Cons
Best Uses
- Color Correction
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Well made and works as it should on the big telephotos.
- Was this a gift?:
- No
Pros
- Easy To Use
- Firm Mount
Cons
Best Uses
- Image Manipulation
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
I am using this in a 500mm F4 IS lens, and it is working as advertised. I saw some other reviews that were concerned that it had plastic threds / gears. It does, but since there is no real load on the components I don't really see a problem. If anything I would have liked to have seen the filter screwed into a rotating base so we could change to something like "Moose Peterson's Warming Polariser", but I understand them not having a threaded component that could come loose and meander throughout the inner workings of the IS system... It is a good product, it works as advertised. Just my .02 worth...
- Was this a gift?:
- No
Pros
- Clear Optics
- Easy To Use
- Firm Mount
Cons
Best Uses
- Color Correction
- Reflection Reduction
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
I use this with a 500mm f4L IS lens on wildlife shoots to do what CP filters are supposed to - cut down reflection for water and enhance the blue of the sky. Mainly useful where there's significant background around the subject, eg hippos in a river, birds in the sky etc. The filter is easily inserted and comes with an accessible adjustment.
- Was this a gift?:
- No
Pros
- Clear Optics
- Easy To Use
- Strong Construction
Cons
Best Uses
- Image Manipulation
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Some might think that the price for this polarizer is a little steep, but imagine paying for a polarizer that is almost 7 inches in diameter. :) And compared to the price of the lenses that use this filter, this is "in the noise". The filter does what it is supposed to do and works well and if you need a polarizer for your big lens, then this is really the only choice you have. Since going digital, a polarizer is the only filter I ever use because it's effects cannot be duplicated in post-processing.
- Was this a gift?:
- No
Pros
- Easy To Use
- Firm Mount
Cons
Best Uses
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Simple! Simple! Simple! Very easy to use.
Pros
- Easy To Use
Cons
Best Uses
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
I bought this to use with my 500mm F4L.
It performs as it should. The construction seems a little light weight though.
- Was this a gift?:
- No
Pros
- Clear Optics
Cons
Best Uses
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Works perfectly for what it is designed for, no complaints at all.
- Was this a gift?:
- No
Pros
- Clear Optics
- Easy To Use
- Firm Mount
- Strong Construction
Cons
Best Uses
- Color Correction
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
This is for my 800mm f/5.6 L. I've only had very limited use with it so far, but I can report back to you that it fits and functions well. I need to use it under more conditions to get a good handle on the strength of the polarization. The other thing would be the need to get a case or pouch for it that would fit both the polarizer and the default glass - because without that there is too much fumbling around with the plastic container that the polarizer comes in, even with both hands free. The lens itself is spectacular - need more experience with the polarizer.
- Was this a gift?:
- No
Pros
Cons
Best Uses
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
The geared rotation is appropriately designed for quick adjustments and as far as I know, this is the only game in town for a Canon super tele. I use it with my 400/2.8 and 200/2. It is about [@] over what I believe to be fair value, so 4 stars.
- Was this a gift?:
- No
Pros
- Clear Optics
Cons
Best Uses
- Image Manipulation
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
This filter is easy to use in my 800mm lens. I am looking for more rear drop-in filters.
- Was this a gift?:
- No
Pros
- Clear Optics
- Easy To Use
- Firm Mount
Cons
Best Uses
- Color Correction
- Image Manipulation
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
[...] Unfortunetly the weather was foul precluding use of the polarizing filter. Great price on a great product made by Canon and lots of positive reviews.
- Was this a gift?:
- No
Pros
- Clear Optics
- Easy To Use
Cons
Best Uses
- Color Correction
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
This is the only option to consider for your big glass, and at the price B&H has it for, it is well worth the investment!!!
Pros
- Easy To Use
- Firm Mount
Cons
Best Uses
- Color Correction
- Reduces glare nicely
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Wild life photography is my main use.
The filter works great very smooth rotation while in my 400mm.
Pros
- Clear Optics
- Easy To Use
- Firm Mount
- Strong Construction
Cons
Best Uses
- Color Correction
- Image Manipulation
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
This is my first use of a drop in filter. All other PL's I have used were front -o-lens mounted.
The little top rotator control is so easy to use, and very accessible.
Pros
- Clear Optics
- Easy To Use
Cons
- Expensive
Best Uses
- Neutral density filter
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
I have been using the drop-in polarizer in lieu of an ND filter in my 300mm f2.8 when I shoot outdoor sporting events such as soccer, softball and football. The polarizer does a great job of bringing very dynamic scenes into a range that my camera can handle without blowing highlights. I also like the colors I get with this filter; the sky is a deeper shade of blue and the grass is quite a bit greener. It also does a good job of reducing the glare off of water and other surfaces caused by polarized light; so I have been told anyway.....
Pros
- Clear Optics
- Easy To Use
- Firm Mount
- Strong Construction
Cons
- Needs registration marks
Best Uses
- Cuts glare and reflection
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
I use this with the Canon 300mm 2.8 lens. I helps cut through the glare of birding in the afternoon, especially when shooting water fowl and shorebirds.
Pros
- Clear Optics
- Easy To Use
- Firm Mount
Cons
Best Uses
- Filter Protection
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
This filter works great on decreasing reflections. The ability to spin the filter withought removing it is a big plus
Pros
- Clear Optics
- Easy To Use
- Firm Mount
- Strong Construction
Cons
Best Uses
- Birds on water
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
Definitely improved mallards in bright shots on water. It is a must have for a 600mm lens. Easy to install. The wheel is a little hard to operate.
Pros
- Easy To Use
Cons
Best Uses
- Outdoor photography
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
If you own one of Canon's super-telephotos, chances are you are outdoors shooting birds and wildlife. This drop in is the only way to go! How else you gonna turn a circular polarizer on a drop in? Take it out to adjust every time? The geared action of this drop in works fantastic, although it is all plastic gearing. It seems they could have maybe made it a little more robust, but it hasn't failed me.
Pros
- Clear Optics
- Consistent Effect
- Firm Mount
- Strong Construction
Cons
- Weak polarizer effect
Best Uses
- Outdoor
Comments about Canon 2585A001 52mm Circular Polarizing Filter (Rear Drop-in):
As many of my wildlife shots with the Canon 500 f/4 lens are on water, a polarizer is a must. I find this convenient, but lacking the more pronounced effects of B+W CPLs on other lenses. I am considering sending this in for the substitution of a stronger polarizer element.
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