3 0 obj As your inputs are first reviewed by the author, they may be published with some delay. It picked the street lamp in this case. To find the nodal point of a lens is quite easy to do, but accuracy is critical. Yesterday I determined the nodal points for eight lenses (one at two different focal lengths) using my pano rig. 14 0 obj Internet links, Contents Liveview mode makes it simpler than ever. This 4.5-inch lens plate is made of T6061 aircraft-grade aluminum. 1. When the images are identical, the stitching is of high quality and the overlap zone completely invisible. (according to lens formula). Now, move the camera forward or backward using the nodal rail until the two objects are lined up just as they had been in the center of the frame view. Thanks, that is in one test i find the 'nodal point' for a given focal length. Miscellanea" of John Bercovitz 1998. When Should You Use the Nodal Point? By a system of adapted perpendicular stages, you'll have to place the camera on the head for its rotary axis and the nodal point to overlap. This was only a test to see how it would workout and it looks good on my computer. With this image of illustration, we can simply note that depending on the way we set our camera on its head, when we rotate it, we can see or not a gap of the foreground in relation to the background. By definition, an input ray directed at a nodal point leads to an output ray which has the same direction, only possibly with a parallel offset. Nodal Points. Definition: points of an optical system for which an incoming ray, directed at a nodal point, leaves the system with the same direction. After weeks with a production Sony a7R V, Chris and Jordan present their final conclusions. FYI the correct term is either the centre of projection, optical centre or "no parallax point", the most widely used term: "nodal point" refers to something else! endobj When I get back from my current trip I'll test the 24-70/2.8 S. It took 7 frames to build the stitched panorama that is sized to print a gallery wrap of 36x84" using a D7200 with the RRS pan head on a leveling plate and RRS nodal slide. FirmwareUpdates How many pictures ? Tripods and bases 1 0 obj How can I keep on giving access to free information like I've been doing since April 2002? For primes, I understand that the nodal point will be fixed, so I could find the point once and mark it, but for zooms, since the nodal point moves when I zoom, a method that can be easily replicated in the field would be best. Please correct these if you have better numbers, and add more lenses. PX4 4.5-inch Arca-Swiss Double Dovetail Plate with Quick Release Adapter Port, PX6 6-inch Arca-Swiss Double Dovetail Plate with Quick Release Adapter Port, PX8 8-inch Arca-Type Double Dovetail Plate with SS2 Quick Release Adapter Port, PXC1 6-inch Arca-Swiss Type Nodal Rail with Integrated Clamp, PXC2 8 Inch Arca-Swiss Type Nodal Rail with Integrated Clamp, A23 Big Lens Mounting Screw 3/8"-16 with 5-32" head, PX0 - PX8 Arca-Swiss Plate | Original Version, Sigma (any lens with a TS-41 Collar and foot). We'll now see this in details. The ProMediaGear PX6 is 6-inches long but similar in width and height to the other lens plates. That way, you can open it with a single click. In Gaussian optics, one can define various types of cardinal points, including the nodal points. 4 0 obj Your panoramic head needs to be calibrated precisely so that the camera and lens optical system rotates around the no-parallax (sometimes called nodal) point which virtually eliminates a parallax error from the image geometry and from the final panorama. 10 0 obj The procedure is the same with primes and zoom lenses and it works in the field as long as you have two vertical reference lines to work with. In any case, you mostly want to remember that there's an ideal rotation point in the lens that depends on its focal - focals if it's a zoom lens - around which you need to rotate the camera to realize perfect overlaps - if the lens doesn't show too many complex distortions to correct - and this furthermore that there's a close foreground. Nodal point for a Nikon 50mm f1.8 G was 65 on the scale. By submitting the information, you give your consent to the potential publication of your inputs on our website according to our rules. In this second part dedicated to the entrance pupil, we'll see how to proceed depending on the type of camera, reflex or not, to find it and ideally place the camera. Want to step into our nursery? If you have a newer lens, you may check and compare it with the lenses of similar size included on this list. Bs. Nothing seems to replace a good setting of the camera to make a panorama by stitching. If you have difficulty seeing a bright spot or disc, just point the back of the camera up at the sky and look into the front of the lens. Just like other ProMediaGear lens plates, the PX4 has an SS2 or QD quick-release strap adapter port. Unfortunately, there are a lot of data for cameras on this site, but only a limited number of lenses. <> There are hundreds of lenses available today and it is difficult to list everything here. Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. In these two photos we want to stitch to make a panorama, we just made sure to keep an overlap zone between the two photos in order to have a stitching zone. All ofthem fit certain sizes of lenses. "Entrance pupil" is correct although a bit imprecise to a geometry purist; it makes a good term for searching the literature and would be preferred in formal writing. Photomerge CC C$), (MKD The quick method/trick to find the "nodal point" for panorama shooting is as . I've recently acquired a number of primes for, amongst other things, landscape panos. Shooting and stitching panoramas are easier with a nodal rail. z), (QAR Panotour / Pro 1.8 Measurement of the light It should be avoided when writing and interpreted with caution in reading the literature. Sign up for exclusive offers, product tips and tricks, upcoming events, and more. Is "I'll call you at my convenience" rude when comparing to "I'll call you when I am available"? We placed the nodal point of this lens just above the rotary axis. Regardless of what you call the no-parallax point, it is easily found by trial and error. 2 0 obj Photo filters MK), (MYR Ft), (ISK After calculating the nodal points for several of my lenses, I got the itch to create another 360-degree panorama. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. ), (NIO 7 0 obj SigmaRebates by ElenaGreen. You don't want to "stupidly" put your camera on a classic head but rotate it around an "ideal" rotation point that is located somewhere in the lens and not below the camera. (There's another condition though: lenses not too distorted). To learn more, see our tips on writing great answers. Fr), (HUF Set up your tripod-mounted pano rig so that it is level and pointed at two objects that are perfectly lined up in the center of your viewfinder/frame using Live View at max magnification. ), Pentax smc DA 10-17mm F3.5-4.5 Fisheye zoom, Samyang 8mm F2.8 UMC Fish-eye II (Sony E), 127mm (sans tilt or shift, focused to infinity), 136mm (sans tilt or shift, minimum focus distance), Camera and lens settings for Nodal Ninja tripod heads -, Camera and lens settings for RRS products at, Very nice and mobile friendly calculator -, Panoramic Calculator by Frank van der Pol -, Panoramic calculator by Sean T. McHugh (at the very bottom), Panoramic Resolution by Ken Turkowski (PDF) -. While that sounds a bit complicated, it's not in practice. You'll have artefacts along overlap zones between two consecutive photos, especially visible in city landscapes where regular geometric lines are the norm. Announcements https://www.youtube.com/watch?v=k0HaRZi-FWs. Finding the nodal point Finding the nodal point simple hands-on instruction using PTGUI By Frank Cullmann Culafra@googlemail.com This article wants to guide you to a new method of finding the nodal point (no-parallax-point) of your camera-lens combination. Typically, you'll want to orient your camera vertically to maximize your panorama's resolution. In this buying guide we've rounded-up several great cameras for shooting sports and action, and recommended the best. The entrance nodal point is thus different from the entrance pupil but it's around the entrance pupil you have to rotate the camera with the stitching method to get perfect overlaps. I'm not really sure what method you're looking for for the zooms though. If you want to get involved, click one of these buttons! In panoramic photography by stitching, it's important that two consecutive images are shot from the same point of view to overlap well when stitching. I am planning to measure the nodal points for all the lenses (and there are some good references available online in regards to doing this), but thought I might first check if there is some sort of standard database on this somewhere - or perhaps if other forum members might contribute the measurements they use for these lenses here. The same who, by the way, would have explained how the nodal point is not that important! The principle is the same for mounting any other type lens on a camera when an adapter can be used. Several manufacturers (Sigma, Tamron, Tokina, etc) offer the same lens for a variety of camera mounts. Kyber and Dilithium explained to primary school students? This allows you to attach an SS2 or QD strap. endobj Next key points: finding the entrance pupil. to sensor plane and mount. I have a 90mm Rodenstock f6.8 lens, and need to know to what point on the lens (nodal point I think they call it), from the film plane, I need to measure to give me 90mm, so that the lens will be focuss. JVr+BNtpuc5#HSWUV%v {8RCmt;5ph[=o;1x :Sg]WlrKU@h0#"F[a$9Jlk[&nH1Hu5*tzgofJq3;#FszmhMnv}1&5izT0Pa^&l3~6t\WZW|xf#~g[9px0m@wM 7B:;zOkTm,FEqS;9v?hZ:o~i4$b^\Y|e\YThKG 3Gx 3{4o+LCr)LFTJ(^x7#Tz!MGm%y5e0fcG+U@! Both longer platesfeature the same pins to stop the lens from moving. The nodal point of the eye is assumed to be 7 mm behind the anterior corneal surface. KM,wm:nM>|}?g'i>O EJ{"bn(Ej86&t~0b0JS(Lm[.A{& =J;A QNU,@.Np/p"$cWuDN|tI 1m'`U" }qt PTgui 11 SonyRebates, As an Amazon Associate, I earn from qualifying purchases. Nodal Ninja 3 Mk3 head and the adjustment required for the distance from the sensor plane () to the tripod mounting screw hole. Whats the best camera for around $2000? . Br), (XPF using "RP Enc" instead of "RP Photonics Encyclopedia". "Use an SLR as a rangefinder " See section "5. I'll produce and post a nice database for everyone. Credit where credit is due! --Ansel Adams. DVD I did a similar print and had it printed using a Sigma 35mm art and it printed out well. Db), (SAR rev2023.1.17.43168. It's the common term, but as often with complex technical subjects like optics, wrong in the case of photography by stitching. Lens -- Larry http://photos.apogeeaimhigher.com http://www.swissarmyfork.com/lens_table_1.htm To find your lens' nodal point: 1. There is a quick way to get a very close estimate that usually works great, or is a close starting point for a more accurate one based on testing. 5 0 obj Shedding some light on the sources of noise, http://www.swissarmyfork.com/lens_table_1.htm, Sigma 60-600mm F4.5-6.3 DG DN OS Pre-production sample gallery, Panasonic Lumix DC-S5 II Sample Gallery (DPReview TV), DPReview TV: Sigma 60-600mm F4.5-6.3 DG DN OS Sport Review, Panasonic Lumix DC-S5 II / DC-S5 IIX initial review, The best cameras for family and friends photos in 2022, Best affordable cameras for sports and action in 2022. <> As far as they get accepted by the author, they will appear above this paragraph together with the authors answer. It's entirely possible to take your panorama shots without using expensive pano heads and the nodal point. - of the head nor the point where the camera is set. What happens when you set your camera on a classic head? Here are some approximate numbers I ran quickly this morning. Above $2500 cameras tend to become increasingly specialized, making it difficult to select a 'best' option. Since different camera manufacturers have different lens mount dimensions, these "third party" lenses are split in a separate table (below). However, when the camera isn't set at the nodal point and we're shooting a city landscape with numerous geometric lines as below, even the best panorama software can't do miracles! ), (BGN Table 2: distance from C.N.D. It should be avoided when writing and interpreted with caution in reading the literature. I think its not the nodalpoint you really are interesting in. Here's typically the type of stitching defects we may find with certain panorama software, in general less powerful because the most powerful among them can "erase" this type of stitching artefact (in Autopano Giga, it's a linear stitching, for the sake of education!). Toggle some bits and get an actual square. PhotographyDeals It would have been the same taken in hand. Fr), (KMF When shooting with a teleobjective lens, it is of course less important. Move the lens forward and back on the mount until the least amount of parallax is evident in the viewfinder. URL: https://www.rp-photonics.com/nodal_points.html. Fr), (CZK For Nikon F mount lenses on a Z camera: 30.5mm; similarly for Canon EF lens on a EOS-R camera: 24.0mm. The turnaround for photo editing was very quick, and the photos he produced were of the upmost quality. But I also notice that if I show it in the middle of a serial, it won't go unnoticed and I'll be asked why this one is less good! [ 13 0 R] If I've got a nodal slider, though, I still need to find the nodal point of the lens. Wouldn't it be great if everyone entered their values for their NPP / Nodal Point / Entrance Pupil for lens and camera combinations. KwZ^s$6R]*^'Y'U FDY;jr6[P}V@9 >k.s7K54m up{ZM"i_p?3;LBLtGhzujF8aE Preparatives The Sony FE 20-70mm F4 G has a very useful focal range, so we took it to the mountains to see how it performs. This site receives, How to Find the Nodal Point for Your Lens, Development Announcement: Sony FE 300mm F2.8 GM OSS Lens, Just Announced: Sony FE 20-70mm F4 G Lens, In Today's B&H Deal Zone: Fast Angelbird 660GB AV Pro XT MK2 CFexpress 2.0 Type B Memory Card Only $699.99 (Save $260.00), Sony E PZ 1650 mm F3.55.6 OSS Lens Firmware Update Version 02 Released, The Aging Log at Hidden Falls, Ricketts Glen State Park, 35 Steps to the Ultimate Sony Alpha 7R V Setup, Big Used Inventory Update at B&H: Check Out the New Camera and Lens Arrivals, Including the Canon RF 28-70mm F2, 100-500mm Lenses, Just Posted: Really Right Stuff PG-02 MK2 Pano-Gimbal Head Review, Rokinon Announces 85mm f/1.8 Compact Lens for Mirrorless Cameras, Southwest Goes 'Above and Beyond' to Help a Photographer Capture Unique Eclipse Shot. cNNH^hIkK)axkb+(.tE\S}\y-A/IX(e4CZDO_1^({+|K`)6 `)CJDugdPj"}{N[ \#|" Q0T4\`yL:TXEw KZ`$/FQt!K{YpQ|lme#q}i?%L/$%' a6i=0 F5k_N3;\w9U1#*!Duyq6sR6S1BZ}q}m[Mu;QG(uI \y=mA}!EMy0sX%.z.P&%RQ{kMF$Q)HG"GL:JD[T[ -pNpp(9Yn"w90r|6(zGHH}%KYwbA8Z)#s/BlPvOn TCi\I]SZ _GSs%FOid\pMGQ;R )Q8P*u Fc.Gb0eEksPY#W~ =qtZ&5P |O=9D2D1>pl6Ca8b6"&F 2Y]?5 5L=Ke4b@7=OG[KAS}36EMOjNEy+e =D?e/w(r^#Of sfZS@AkP*a:^uU*h#~)ZfR] }}I1rQkt3W'P$UULha0Lh['`MiqFr"bEYx.W>EQN~?yt~&%!e#Hxv;Jc/[v_^oM&]o mVJ==b}Xl3 How to rename a file based on a directory name? In a telephoto lens design; many times the nodal points are outside the physical body of the lens. Test conditions: Two vertical lines, 1.5 and 10 meters from camera. ), (BAM Tokina These capable cameras should be solid and well-built, have both the speed and focus to capture fast action and offer professional-level image quality. Figure 1: The nodal points of a thick lens. Indeed, when we're moving above the ground, we can observe a progressive gap of the foregrounds regarding the backgrounds. With the 3D vision provided by your two eyes, it is easy to judge the approximate position of the bright spot: just move a finger along the lens barrel to a point where it seems to be the same distance away. So I asked myself: what can I do? The Nodal Point. So for example for a Canon 300d and a 10-22mm at 10mm, the total Entrance pupil distance from the tripod mount is 40mm + 66mm = 106mm. Well, it's no big issue and in the facts, whether you talk about nodal point or entrance pupil, it's the ideal rotation point and that's the most important. I have secured the needed wall space to display at a local business where the theme complements the business. {s Site Maintenance- Friday, January 20, 2023 02:00 UTC (Thursday Jan 19 9PM Do I "need" a panoramic head to shoot 360 panoramas? endstream In the frequently encountered situation where the refractive index is the same in front of and behind the optical system, the nodal points coincide with the principal points. The most common listed method however is the following experiment (also described on the site is the point on the lens about which it must be rotated in order to eliminate parallax when joining images to make a panorama. <BR><BR> Grab any old lens and hold it one foot away from your eye and rotate the lens; while viewing a room lamp across the room. The rotary axis of the head should then be located at the vertical of this nodal point. Catch ProMediaGear on Facebook, Twitter, Instagram, and YouTube for product information, promotions, and discounts. There is a nice video explaining how to do it here: https://www.youtube.com/watch?v=k0HaRZi-FWs. I am planning to measure the nodal points for all the lenses (and there are some good references available online in regards to doing this), but thought I might first check if there is some sort of standard database on this somewhere - or perhaps if other forum members might contribute the measurements they use for these lenses here. ProMediaGear lens plates are made of CNC, aircraft-grade aluminum which is lightweight and durable. The advantage of the PX8 is its compatibility with a C60 or C40 Arca clamp. Please do not enter personal data here; we would otherwise delete it soon. Framing and composition <> Is this variant of Exact Path Length Problem easy or NP Complete. If you in the field realise that you need another focal length you could either calibrate it in the field as shown in the video or perform some crude interpolation from the data you've already got. When it's about panoramic photography by stitching, you just need to rotate the camera around the entrance pupil and not the nodal point, that can by the way be really far depending on the lenses. Manfrotto 303 head When was the term directory replaced by folder? The movement of the nodal point (as a function of the present focal length) of the zoom lens does not have to be linear. Panorama software som), (LBP I will post any findings using a Z7 with a 50mm S lens when I find the subject I want to use it on. To see the image at 72dpi as that is what loaded well into Flickr click here. Subscribe for our occasional product and deal announcements and be first to know what is happening. No matter how well the vertical lines line up the images always had the lines barreling up instead of sagging. <> How to cite the article; suggest additional literature. With such lenses, it is good to pick one angle at which you like to stitch, and rotate your camera around a point that gives no parallax at that angle. Just adjust the rotation point so that foreground and background points stay lined up. The search for three or four should be enough though! Kalahari V2 head Most higher-end image editing programs now feature automated panorama stitching, but if you don't rotate the lens on its nodal point while capturing the individual images for your spherical panorama, even the best image editing programs will find it challenging to stitch all of the images perfectly. --Richard Korff 11:12, 13 May 2005 (EDT). What's the best camera for shooting sports and action? How do I find the focal length when stitching images made with an unknown lens in Hugin? endobj . In the previous page, we saw that it's better to rotate the camera around an ideal rotation point, the entrance pupil (wrongly called nodal point), in order to guarantee perfect stitchings (if the lens doesn't have complex distortions however or if we use the best panorama software on the market). Sorry, we don't have an article for that keyword! S/. This is convenient for example, if the value listed for your lens is for the Canon version and you have a Nikon, you just have to add 2.5mm (46.5mm - 44mm). The NPP and nodal points have clear definitions in optics ( Cardinal point (optics) - Wikipedia) and NPP is in fact the correct term to use. One needs two vertical objects as reference points, like a street lamp post Why is water leaking from this hole under the sink? The dome and the street lamp are also aligned on the two photos while we did rotate the camera. We worked with Gary for a corporate executive portrait session, and he greatly exceeded our expectations. CanonRefurbished If planning to travel to remote areas to capture panoramic images, storing the nodal point measurement values locally on your smartphone in a notepad app (or alternately in a traditional paper notepad) would be best. The panoramic head is perfectly set to make stitching easy. Nodal point / No parallax point Homepage | Contents | What'new ! Cambo CHL-500 (If you later retract your consent, we will delete those inputs.) The Centre Nodal Point (C.N.D.) > ~75 recommended. $.' I'll stress again, but I already explained why above, that the less you shoot close subjects, hence beautiful and distant skylines, the less the problem of the nodal point (of the entrance pupil) is raised. We'll now see this in details. We've taken a close look at the S5 II and discuss what the more video-focused S5 IIX will bring. All content, design, and layout are Copyright 19982023 Digital Photography Review All Rights Reserved. Regardless of what you call the no-parallax point, it is easily found by trial and error. If using a zoom lens for your panos, you'll need to determine the nodal points for all focal lengths you intend on using for your panos. To take pansorama photos, we need to rotate our camera. What's the best camera for around $2000? http://www.vrwave.com/panoramic-lens-database, http://www.nodalninja.com/support/settings-for-other-cameras/80/, http://www.reallyrightstuff.com/Known-No-Parallax-Points.html, https://olypedia.de/index.php?title=Nodalpunkte_E_System, https://olypedia.de/index.php?title=Nodalpunkte_E-300_/_E-500, https://olypedia.de/index.php?title=Nodalpunkte_E-1, http://www.hugha.co.uk/NodalPoint/Index.htm, http://www.frankvanderpol.nl/fov_pan_calc.htm, http://www.cambridgeincolour.com/tutorials/image-projections.htm, http://www.dicklyon.com/phototech/PhotoTech_27_Resolution_Slides.pdf, http://www.swissarmyfork.com/lens_table_1.htm, http://www.swissarmyfork.com/mount_table_1.htm, http://www.pierretoscani.com/fisheyes-(in-english).html, https://wiki.panotools.org/index.php?title=Entrance_Pupil_Database&oldid=17281, Canon EOS 300D / Digital Rebel (EOS Digital Rebel), Canon EOS 760D (EOS Rebel T6s / EOS 8000D), 15 mm (or see FTZ adapter for F mount lenses below), 13 mm (or add 30.5mm to Z6, Z7 camera tripod screw), 44.5mm (need confirm from another person/setup), 1.5mm (need confirm from another person/setup), 21.5mm at F11, focus infinity at red dot mark. The distance between the nodal points is the nodal sometimes many millimeters. In the second page dedicated to the entrance pupil - still often called nodal point - we'll see concretely how to find it - Find the entrance pupil, Pratical Guide N1 : For me, that was two light stands set up in my studio about 6' (1.83m) apart. It seems that if you don't try to set your camera at the nodal point, certain software like PTGui or Autopano Giga stitch better the images in the central part of the final image, rejecting quite intelligently the unavoidable defects at the edges. Furthermore, it depends on the situation. These images above demonstrate to parallax effect created by panning the lens across a scene with one nearby object (the rock) appearing to move in relation to a distant one (the tree line), and below the effect after the camera's position was corrected. There are a lot of photo/video cameras that have found a role as B-cameras on professional film productions or even A-cameras for amateur and independent productions. If you try with other panorama software you'll see that they make the choice of a neat foreground but don't manage very well to align the background, in numerous cases. We can clearly see a gap between the streetlamp (foreground) and the dome of the Institut de France (in the distance) when we rotated the camera (photo 2) without taking into account the way we set it on the head unless we even shot with the camera in the hand. EXPIRES JANUARY 31, 2023, Ellaborate description of the no-parallax point problem, (DZD But its durability is not compromised. Hugin 2018 Firefox or Chrome)! This is easy to measure and is dependent only on the camera body. http://www.andrewsandersphotography.co.uk, It's still very important. (Please enter the sum of thirteen and three in the form of digits!). endobj q>`)cuzZsff_$U]Fd%Fov@d},aQC*z[#O01]iZCS&kc It is often around the middle of the lens and varies with the focal length of a zoom lens (although - "FYI the correct term is either the centre of projection, optical centre or "no parallax point", the most widely used term: "nodal point" refers to something else! kr), (IDR It's in the plan of the diaphragm/iris seen from the front face of the lens - photos over here - through the front lens since according to the official definition, this nodal point (that should normally be called entrance pupil) is "the image of the opening diaphragm seen from the subject". When you're zooming in, we clearly see this plan move inside the latter, by the way. We've selected a group of cameras that are easy to keep with you, and that can adapt to take photos wherever and whenever something memorable happens. to sensor plane and mount for E-1 after Klaus Schraeder. Follow these steps to create a Lens File Asset in your project: In the Content Browser, right-click to open the context menu and choose Miscellaneous > Lens File to create a new Lens File Asset. CanonRebates This point is not located at the same point, depending on the focal used in a zoom lens. It is lucrative though, and enables many websites to keep on living. Kalahari head John Houghton's Guide to Finding No-Parallax Point (great guide, scroll down to chapter 5 for ring-based panorama heads such as Nodal Ninja R1/R10/R20). What is the proper procedure for stitching photographs using Nodal Ninja and Hugin? Fast continuous shooting, reliable autofocus and great battery life are just three of the most important factors. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Rotate the camera left or right and move the camera forward/backward to create an identical view. Edits It may be a little bit nerdy, but it is straight forward. But historically, we started by talking about the nodal point and it's still very present in minds. The camera mustn't rotate around one of the two nodal points but around another point: the entrance pupil of the lens. Other primes that I have that I won't be using for panos, but am nevertheless curious about, include: Here is some lenses: (just 50mm/1,4 of your lenses) Nodal Point Database Symphotic Posts: 704 Member March 2019 in Nikon Lenses Hello, Everyone! The answer is clearly NO, not compulsory! There are thus several "nodal points" in a zoom lens. There's a gap between the foreground and the background. The image seen may be magnified by the effect of the lens elements in front of it, and the image is displaced from the actual position of the aperture. It's usual, to talk about this "famous" point, to talk about the nodal point. 12 0 obj your website, social media, a discussion forum, Wikipedia), you can get the required code here. I have the RRS pano kit, and plan on doing measurements along the lines you suggested. now try different angles with the cursor (and draw lines), always pointing it to the center of the lens, so that you see . The ProMediaGear PX4 is the shortest among the available lens plates. Here is the illustration of my words in a picture of example. To keep on developing this website, I'm going to need a regular income just like everyone else.
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