Singh-Ray 77mm Vari-N-Duo Polarizing Variable Neutral Density Filter (Thin Ring)

Singh-Ray 77mm Vari-N-Duo Polarizing Variable Neutral Density Filter (Thin Ring)

Singh-Ray 77mm Vari-N-Duo Polarizing Variable Neutral Density Filter (Thin Ring)

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Product Highlights

  • Neutral Density with Warming
  • Adjust Density From 2-2/3 - 8 f/ Stops
  • Thinner Mount
  • Made With Glass

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Singh-Ray RT-90 overview

  • 1Description

The Singh-Ray 77mm Vari-N-Duo Polarizing Variable Neutral Density Filter gives you the incredible benefits of two filters in one. With this unique glass filter, you can not only slow down the action but add in the effects of a warming polarizer.

Heretofore, when photographers wanted to create this effect, they had to "stack" filters on the lens - a sure ticket to vignetting. Now, this all-in-one system permits you to carry one filter to achieve the desired results. Please note that Singh-Ray thin mount filters do not have a front thread.
Additionally - the design of the Vari-N-Duo Filter may introduce irregularities when used with very wide angle lenses, especially on full-frame cameras. Adjust your focal length and reduce the filter density setting until the irregularities disappear.

Front Min/Max density ring lets you adjust density from 2-2/3 to 8 f/stops - greatly extends exposure times
Polarization is easily controlled by rotating the ring just behind the Min/Max ring
The glass LB Warming Polarizer reduces glare from sky, water, wet rocks, and other reflective surfaces
Filter thread on front ring of Standard mount lets you add either a Mor-Slo 5-stop Solid ND Filter or a Cokin holder for ND Grad Filters
In the Box
Singh-Ray 77mm Vari-N-Duo Polarizing Variable Neutral Density Filter (Thin Ring)
  • Protective Case
  • Optical Cloth Liner
  • Warranted Against Manufacturer's Defects for 90-Days
  • Table of Contents
    • 1Description

    Singh-Ray RT-90 specs

    Filter Type Variable ND Combination
    Combination Type Circular Polarizer, Warming
    Density 0.8 (2.6 Stops) to 2.4 (8 Stops)
    Shape Circle
    Circular Size 77 mm
    Front Accessory Thread / Bayonet Unthreaded
    Physical Feature Slim
    Filter Material Glass
    Coatings None
    Packaging Info
    Package Weight 0.26 lb
    Box Dimensions (LxWxH) 4.1 x 3.7 x 1.0"

    Singh-Ray RT-90 reviews

    77mm Vari-N-Duo Polarizing Variable Neutral Density Filter (Thin Ring) is rated 4.3 out of 5 by 32.
    Rated 3 out of 5 by from Good, but have a small flaw I used to use a 10 stop filter before deciding to purchase the singh-ray. There were two reasons for that: 1) To get different gradients, and 2) reduce the inconvenience of focusing the camera, shifting to manual focus and screwing the lens in. The singh-ray solved these problems, but introduced another: vignetting. On a full frame, I lose at least 5-8mm of focal length if I want to have a clear picture. I picked up the filter with the thin mount to reduce vignetting, but it happens anyways. I am still going to keep the filter for images where I would need to zoom in.
    Date published: 2012-05-22
    Rated 5 out of 5 by from Fabulous water works tool! I got this filter especially because I enjoy playing with long exposures on moving water - ocean waves, streams, waterfalls. I was able to get that milky effect on a bright sunny day. The only thing I haven't gotten used to yet is that it will vignette on my 5D with 24-105 at somewhere around 35mm or less, as most everyone has pointed out. I was a little apprehensive about the warming polarizer but I'm glad I got this filter and not the one without the polarizer. Like any, you can choose to use the polarizing effect or not. And you can add graduated neutral density in front of it. Awesome purchase.
    Date published: 2012-10-29
    Rated 5 out of 5 by from Nice Effect to slow movement I bought the slim model instead of the regular model to avoid some of the vignetting issues on my canon 24-70 but it doesnt seem to matter. I still have vignetting until about 30mm. The filter does as advertised. I noticed that near the maximum neutral density if my light source is not uniform I get some strange lighting issues. Also it would be nice if the circular polarizer were marked for reference points. Also the filter rotates a bit too easily. Would be nice if there were more resistance.
    Date published: 2011-04-03
    Rated 4 out of 5 by from Var ND Duo Filter I finally justified the expense last month. Living close to Great Falls of the Potomac provides the perfect spot to shoot long exposure waterfalls. The filter works as advertised. I use it on my 24 to 70 on full frame Nikon. Vignettes around 24mm. The build quality is great. Very easy to select degree of filtering. The effect is stunning. Just the cost keeps this from 5 star review! Will attempt some of the 30 sec exposure Tony Sweet raves about soon.
    Date published: 2011-03-01
    Rated 3 out of 5 by from Vignettes on 24mm or Wider but Great Ideally you should mount this on 28mm or 35mm if you want to eliminate the dark corners. The instructions clearly state this but the specification on B&H do not. Another artifact that happens is blotchy density using a full frame sensor if you go too dark with the ND portion of the filter see picture below which was shot with a Nikon D800E and a 24mm 1.4, 1 sec, f10 at Max ND.
    Date published: 2013-12-19
    Rated 5 out of 5 by from Incredible Product! This filter is the real deal. It comes with a very nice case, the build quality of the filter is second to none, and the optical quality is extraordinary. It is easy to screw on to the front of my Canon EF 24-105mm f/4 L IS USM Lens. Setting the degree of polarization and ND is very easy. My routine is: -Set white balance -Set the ND to min -Orient the camera for the picture you intend to shoot -Set the degree of polarization -Ensure the focal length is >45mm (Using a Canon EOS 5D Mark III Digital SLR) -Focus -Switch to manual focus -Set the degree of ND -Meter in live view (the viewfinder is worthless when the ND is all the way up) It may sound like a lot, but it's relatively quick and painless. One more thing, I recommend using this filter exclusively with a tripod. The slow exposures this filter can create are beautiful! I really like the variable ND function, and the options it creates in broad daylight. The polarizer is excellent, and the warming effect is nice. The lamest thing about this filter is the vignette. My experience precludes anything wider than 50mm. However, if you're patient and take panoramas, this isn't much of a limitation. Singh-ray needs to make a larger version. I'd buy it in a heartbeat. Bottom line, if you can get over the vignette, you'll dig this filter. If you even think the vignetting will bug you, I recommend you hold off.
    Date published: 2012-04-16
    Rated 4 out of 5 by from Handy As much as I like that it is both a Neutral Density and a Polarizing filter, the thickness is not wide angle friendly. On a full frame sensor, I need to go at least 40mm to avoid the vignetting. From a guy who usually shoots (landscaper here) 16-20mm, there is huge adjustment period. However, for my portrait work during mid day, this filter is awesome. Shooting at f2.8 with the Neutral Density dialed way up is a fun feature.
    Date published: 2011-10-24
    Rated 4 out of 5 by from I would recommend this product I use this filter with thin ring to reduce the vignetting to a stop for super wide angle lens. I am very happy it does not have any vignetting effect on my Olympus ED 50-200mm (100-400mm equiv.) lens. I also bought other Singh-ray filters from B+H such as LB color combo and ND Vari (Standard) for different purpose. My intention of buying this filter is specifically for landscaping scenes as it gives me 2-8 stop ND plus it produces great colors for landscaping. The result as it turned out was to my satisfaction because I am able to reduce very challenging bright light condition while enhancing the natural colors. I wish Sing-Ray produces various sizes for this filter.
    Date published: 2012-02-17
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