rick_tyrseck Posted March 26, 2008 Share Posted March 26, 2008 Being a Canon DSLR user...I wanted input from thee Canon boys: 1) Realize I can do some ND grad work in CS3 using layer blending modes, but that assumes the sensor did capture all the tonal ranges. 2) So with that said and needing filter help when the situation calls for, in deciding what type/brand, etc of ND grad set to buy, I am rather confused over this hard-edge vs soft-edge thing. I researched old posts and found this from the early 1900's (really 2002) .....The hardness of the "edge" on an ND Grad depends in part on the diameter of your lens. Hypothetically, suppose the hard edge transitions from clear to 0.6 over 1 cm and the soft edge transitions from clear to 0.6 over 3 cm. Your 52 mm 50/1.8 is going to "see" a smaller part of that transition than your 77 mm 80-200. Speaking of zooms, the amount of transition your 20-35 "sees" will vary as you zoom from 20 to 35. Lastly, the hardness of the edge depends on aperture. The amount of that 3 cm soft edge that is included in the image on your 50/1.8 at f/1.8 will be quite different than at f/16. 3) and lastly...do you really need a holder, or do people often just hand hold these. I can imagine it is hard to position manually and keep like that, but you don't really need to keep it absolutely still don't you? Thx....Rick Link to comment Share on other sites More sharing options...
dale_yarbrough Posted March 26, 2008 Share Posted March 26, 2008 Rick: I used a friend's ND (hand-held) and absolutely loved what it did for me. I then proceeded to Singh-Ray's website (http://www.singh-ray.com/index.html) and proceeded to read everything I could about ND. I also called their facility and spoke with Dr. Singh himself...a very helpful and knowledgable individual...and proceeded to purchase my first Graduated ND glass (4"x6" 4-stop soft.) I also purchased a Cokin Z-Pro Series holder from B&H that allows me to use the ND with most all of my lens. The holder really helps with placing the filter effects in the place I want without having to be a contortionist. Visit the web-site and I think a few of your concrens will be addressed. Good luck. Link to comment Share on other sites More sharing options...
images_in_light_north_west Posted March 26, 2008 Share Posted March 26, 2008 I use Lee and they work great, I would definitly recomend the holder I use there GND soft edge in.45,.6,.9 (1 1/2,2,3, stops) with the 77mm holder that is threaded so I can also use a CPL. Link to comment Share on other sites More sharing options...
mark_chappell Posted March 26, 2008 Share Posted March 26, 2008 <I>Being a Canon DSLR user...I wanted input from thee Canon <B>boys:</b></I><P> Not everyone here has a Y chromosome. That aside, I use Singh-Ray filters in a Cokin holder. Hand-holding is possible but usually is a PIA, especially if you're trying for a careful composition. I only do that if I have to (e.g., I forgot the holder or don't have the right filter thread adapter for it). Generally I much prefer hard-edge GNDs (2- and 3-stop), even with wideangles (down to 17mm) at small apertures, where the edge is most likely to be apparent. Link to comment Share on other sites More sharing options...
justinblack Posted March 26, 2008 Share Posted March 26, 2008 Singh-Ray's Galen Rowell ND Grads have always done the trick for me. I regularly use the following: - 1-Stop Hard - 2-Stop Hard and Soft - 3-Stop Hard and Soft - 4-Stop Hard I would strongly recommend trying a hard-edge grad to begin with. They are much easier to learn to use and position accurately. Once you are used to the hard-edge filter, a soft- edge filter will be a lot easier to use properly. Link to comment Share on other sites More sharing options...
eigtball Posted March 26, 2008 Share Posted March 26, 2008 Say good bye to those hard earned dollars! I am jealous. Link to comment Share on other sites More sharing options...
photo_dark Posted March 26, 2008 Share Posted March 26, 2008 I have a 2 stop soft edge Cokin... The effect is wonderful for landscapes, but the quality is iffy at best. Tends to make my 17-40L inherit the characteristics of my old kit lens. In my opinion, go for the singh ray. They're worth every penny. Link to comment Share on other sites More sharing options...
JDMvW Posted March 26, 2008 Share Posted March 26, 2008 You sorta hint about what lenses you might have in your examples, but I would say how much you should spend on this depends on a number of variables. 1) how "superb" are the lenses you have? Maybe if you've got the kit lens you can make do with the odd knockoff filter. 2) will you use the effect for a couple of pictures, or will you do like one person whose pictures for sale showed nearly every one taken with a artificially darkened sky? I would presume that that person has the very best filters, and rightly so. Maybe buy a nice set of knock-offs from eBay or someone like Fotodiox for practically nothing (by comparison to the premium ones), try it, and if you like it and think the filter is degrading your image too much, then by all means get the best (although I'm obliged to say that is not necessarily the same as the most expensive). Also, do investigate the software methods in any case. Link to comment Share on other sites More sharing options...
alan_myers Posted March 26, 2008 Share Posted March 26, 2008 Yeah, I was going to suggest you get the two Cokin Graduated gray filters to experiment with. They're cheap. Then decide later if you need one, the other or both, or something entirely different. A Cokin holder is cheap, too. And I think practically everyone else makes filters to fit it, at least the Cokin Pro size (fits up to 82mm, IIRC). The way to come pretty darned close to the same effect in Photoshop is to make two exposures at the time you take the shot: One for the foreground and middle, the other for the sky. Alternatively, double process just about any RAW file. There's tons more info in there than you might realize. Set the exposure/brightness/shadow on one for the foreground/middle, and the other for the sky. Then just lay one image over the other and get busy with the eraser tool. (Learn about masks, selectionis, etc. eventually too, it's much faster.) In some respects, it's better in Photoshop. When is the last time you saw an ND grad that perfectly matched the shape of that mountain? Or that you could use with a moving subject? Ever noticed the "grad effect" in photos? It's more obvious with colored grads, but still can sometimes be seen with many NDs, too. Not saying don't get an ND Grad or two, go for it. But also don't give up on double processing in Photoshop... Or Google for HDR image processing and start reading. Then Link to comment Share on other sites More sharing options...
jim henderson Posted March 27, 2008 Share Posted March 27, 2008 Cokin are not very good. Lee are very expensive. A good affordable atlernative is to use Hitech Filters. http://www.teamworkphoto.com/index.php? main_page=index&manufacturers_id=7&zenid=1ebac269f7fb027dda946028f883aad5 Link to comment Share on other sites More sharing options...
photo_dark Posted March 27, 2008 Share Posted March 27, 2008 how do the hi-tech filters compare to singh-ray and cokin? I have the cokin, but i'd like to pick up that 3 piece set if it really is of better quality... $60 for all three is a great price. Link to comment Share on other sites More sharing options...
patrick.mason Posted March 28, 2008 Share Posted March 28, 2008 Gentlemen, gentlemen... I know I'm going to be crucified for my comment, but here goes: I'll make this short but not too sweet. Assumption: We are all shooting digital... no one here is shooting film. Thesis: {There is NOTHING a filter can add or subtract from any digitally captured frame that can not be manipulated in post production with today's software.} When we capture a digital frame, we are capturing a DIGITAL representation of what the lens saw NOT a chemical reaction on film... BIG difference. When the capture is in the digital domain, in the raw, anything... ANYTHING can be adjusted, augmented or subtracted... conversely, if we were in the film domain (chemistry, one shot!)... we would need all the help technology and the state of the art could provide. I did not spend nearly $10K on digital equipment not to capture the image, as nature presented it. We always have the original 'digital negative' to do with as we please, but, if we capture a 'tinted' or otherwise falsely altered record of the shoot... we're screwed. We can never return to the naked original that first captivated our interest. Filters have their place, I'm not convinced, however, that 'warming' the frame, for instance, during the capture is the proper time or application. Just one man's opinion, but think about it. Link to comment Share on other sites More sharing options...
mark_chappell Posted March 28, 2008 Share Posted March 28, 2008 <I> {There is NOTHING a filter can add or subtract from any digitally captured frame that can not be manipulated in post production with today's software.} ..... When the capture is in the digital domain, in the raw, anything... ANYTHING can be adjusted, augmented or subtracted... </i><p> In my opinion: Wrong. (consider yourself crucified, figuratively at least). The dynamic range of any capture medium, including digital, has limits. In many scenes, especially those that include a lot of sky, the range of ambient light intensities exceeds -- sometimes considerably -- the limits of film or digital sensors. No amount of post- processing can recover information that is missing in the original image (i.e., blown highlights or completely black shadow areas). However, a properly-used grad ND filter can narrow the contrast range so that blown highlights or black shadows are reduced or eliminated. <P> <I>I did not spend nearly $10K on digital equipment not to capture the image, as nature presented it. </I><P> Presented it to what? Your visual system has a substantially greater ability to 'capture' a wide range of light intensities than digital sensors or film, so in that sense pretty much any camera-captured image is a distortion of the original scene relative to how a human observer would see it. In my view, when dealing with high-contrast subjects, using tools like grad ND's is a way of making a photograph look MORE like how I viewed a scene than what can be captured in an unfiltered image.<P> Yes, grad ND's and other filters have their limits, but so do software manipulation, double-processing of RAW images, HDR techniques, etc. Link to comment Share on other sites More sharing options...
denny_wells Posted March 28, 2008 Share Posted March 28, 2008 Here's an interesting comparison of HDR software vs. Grad ND filter. http://singhray.blogspot.com/2006/12/close-look-at-high-dynamic-range-hdr.html The rest of the blog is a bit sales-pitch like, but it has a lot of good examples to see what folks are doing with filters. Link to comment Share on other sites More sharing options...
fotografz Posted March 28, 2008 Share Posted March 28, 2008 I shoot Canon and Hasselblad MF digital professionally. Filters are STILL a great tool, and in some cases ND Grads or color grads are specifically indispensable. NDs shorten the exposure range and places it closer to the capture ability of the digital sensor. The dynamic range of my MF digital back is superior to that of my Canon 1DsMKIII, yet I still use ND Grads to keep the dynamic range within the histogram parameters in many situations. HDR is nice if nothing is moving. Dual processing of RAW files to capture the full tonal range often either produces noise in the deep shadows or artifacts/edge C/A in the brights ... if dual processing worked evenly, there'd be no need for HDR. Link to comment Share on other sites More sharing options...
images_in_light_north_west Posted April 2, 2008 Share Posted April 2, 2008 Gentlemen, gentlemen... I know I'm going to be crucified for my comment, but here goes: I'll make this short but not too sweet. Assumption: We are all shooting digital... no one here is shooting film. Thesis: {There is NOTHING a filter can add or subtract from any digitally captured frame that can not be manipulated in post production with today's software..............SO SO wrong, if you use ND filtera and keep your highlights if you dont you loose them and they can never be recovered. Not with any software Link to comment Share on other sites More sharing options...
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