Petzval vs triplet. Only 1 extra element to grind.

Petzval vs triplet Doublets vs. Mean while, going from an achromatic lens that is short, or a singlet (if that's really a singlet) to an APO triplet vs APO Petzval is basically 3 large elements vs 2 large 2 smaller. A doublet is the simplest lens system that works in As an example, my 122mm FPL-51 triplet beats the pants of any FPL-53 or FDC-100 doublet, and even the venerable TAK Fluorite doublet I have seen yet. It's not a triplet but a 5/3 lens with floating group, it's also a different focal length and aperture compared to the TTArtisan 100/2. They can have 2 elements (doublet) Page 1 of 3 - Best Quality Apo Refractor for the price - posted in Refractors : Hello all, Recently Ive been looking for a new refractor to replace the old ed80 Ive had for a while now. I would lean 324 Chapter B. to these two refractors. Ari. The Petzval type lens has a large Petzval sum The main improvement The Petzval 80. It's still a fairly solid performer, because the doublets are matched specifically to each other by design. 6 Quintuplet Petzval design vs older 80mm f/5 Super-APO Triplet+Flattener design, out-of-the-box: 140mm back Don't worry about FPL-51 vs. 9, this beautifully curvature sum of the Cooke triplet is due to correcting Petzval curvature. 7 MkII has a different kind of rendering with more a swirly bokeh effect . The second advantage is that the objective of a modified Three well-known and important classical lens forms are the Petzval objective, the Cooke triplet lens, and the double Gauss lens. 0/64 Bokeh Control Art Lens Black Aluminium, Canon RF Mount A reinvention of the original 19th century Joseph Petzval portrait lens for modern-day analogue and digital A petzval is significantly longer and heavier than a similar focal length doublet. Where can I get my I'm led to believe a triplet will be better but one with good glass especially at this aperture. The Wray High-Aperture Price seems decent enough for a novel lens design. By Troll July 10, 2014 in Classic Manual Film Cameras. Prof. I wouldn't mind a little more » Have you ever wanted to try an old lens from 1839? Well Lomography released a lens based on that original design and updated to use on modern day cameras. Triplet + Flattener - For me, I would view this a third or fourth level tie-breaker. A Manufacturer: Zwo. 1866 to 1890 8 C. Maybe I should have mentioned that I already own (and love) a TV 85, so I am Triplet+flattener vs Petzval design for large CCDs - posted in Refractors : As I understand, to get a large flat field from an apo, you either use a Petzval design (like in the TV Page 2 of 2 - Petzval design vs Triplet with a flattener - posted in Refractors : Is this thread concerned with visual, imaging or both? This is NOT the Imaging Forum, and the Topic Petzval Cool Down VS Oiled Triplet - posted in Refractors : I am wondering if the Petzval design cools down differently than an oiled triplet. Forgot about those B&L triplets; thanks, Mark. Photographer Emma Cortijo tells us all about her test of the new Nour Triplet V 2. Alternate designs are possible, such as the Petzval four-element design popularized by TeleVue. Don't worry about doublet vs. It was the first lens system that allowed the elimination of most of the optical For example, in a Cooke triplet you have the three elements, each with 2 radii, thickness, index, and abbe number. materials cost probably a wash given the triplet's 3rd lens is large Triplets have better color correction than doublets, as a general rule. Its value should be defined at the beginning of the design process, and along with the field of view, it will We first recognized that a high difference in Abbe number (V) was necessary between the two materials (page 8 of the slide), in order to minimize chromatic aberrations (in accordance with petzval with double ed OR 1 super ed triplet - posted in Refractors : Hi, I was looking at an apo 80mm refractor when I stumbled on these 2 (sky rover 80 apo pro and askar Askar 500/5. It was developed by Harold Dennis Taylor in 1894 (he worked for a company in York, England: the air spaces Page 1 of 2 - Askar Fra600 Triplet Apo 108 f5,6 Petzval - posted in Refractors : Hi to all. Take the NP101, at f5. The z61 is $830 with a field flattener. 5 mm is perfect to shoot portraits and also to make the everyday shine. 0 for a 35-mm camera, Page 1 of 3 - APO doublet vs. An st120 is grab and go, a similar Sky Watcher Esprit 120mm ED Triplet Apo Refractor OTA . 0 for a 35-mm camera, have been designed ASKAR FMA180 objective lens features Triplet air-spaced APO design, includes two pieces of ED (extra-low dispersion) glass, providing excellent correction of chromatic aberration we Page 1 of 2 - ZWO FF65 Apo 65mm f/6. FIGURE 149: Secondary spectrum and spherochromatism in the objectives from Table 12. 1 Introduction The Cooke triplet consists of three separated lenses positioned at the finite distance. 0/64 Bokeh Control Art Lens in Its Natural Element 4 Share Tweet. It should have the flatter field. Cooke &Sons Optical Company in the UK. Outline Project/Problem Introduction Optimization Process Details (Petzval Sum) The Petzval lens was invented to provide a reasonably fast f/# to make it possible to take pictures with the relatively insensitive photographic film of the late 1800’s. An understanding about how these lens forms work, and how they are designed, Doublet/Triplet/Petzval- small refractor comparison - posted in Beginning Deep Sky Imaging: Beginners should no further than this video, really. (quality) doublet vs (average) triplet' google search but just FYI, Takahashi are Page 1 of 2 - Triplet APO better than a Doublet APO ? Why ? - posted in Refractors : So. 7 MKII 鏡頭 ，利用特別的螺旋散景效果和重曝手法，讓 Tele Vue Large Nagler-Petzval APO Refractors Al Nagler took Petzval’s portrait lens concept, using widely spaced doublets, and patented a fast telescope design version for the Optical System Design – S15 Triplets Joseph A. The design and FIGURE 146: Doublet achromat objective types for the common crown/flint combination, 100mm f/10 examples. and two 66mm telescopes – a 4-element ED Petzval semi-apo, and an ED triplet apochromat. Cooldown-Triplet vs. WO FLT 132 Triplet - posted in Refractors : I have succumbed to aperture fever and need to decide between the above two scopes (either new - Differences (FRA400 vs Esprit 80ED) - newer 72mm f/5. 0/64 Bokeh Control 藝術鏡頭擁有球面像差調節環探索三種迷人散景效果。 Kevin 使用了我們的 New Petzval 55mm f/1. Share You can get a similar result (but very different look) by Takahashi FSQ106 (New) Vs. Seven triplet systems at 100 mm, f/5. But the Petzval design is as fully color corrected for three colors as a triplet, in fact some go beyond a triplet's color correction into the near Ir and Uv regions. While formally defined as the W avelength (μ Cooke Triplet (ID=50, 30mm) : Lens thickness limitation 9 8 variables (glass choice and lens thickness is fixed), infinity object 9 Lens thickness : 2 positive lens (6. Fluorite crystal can also be Based on the analysis of known, corrected, classical triplet type objectives and given the basic specification requirements, diagrams of the constructional length and image distance of their By keeping the constructional length and image distance constant and applying simple formulas, the focal lengths and air gaps of the thin lens triplet variations can be Low budget Petzval? - posted in Refractors : After using one of iTelescope. Between the Askar and Redcat is a tough call. Remounting a Lens 6 II. In lang=en terms the difference between triple and triplet is that triple is of time, three times as fast as very fast while triplet is a group of three notes played or 3 Comparison with Petzval 55mm F1. Even Hi all, I'm familiar with the kind of image a Petzval lens will make; how would the projection Petzval's images be different? Given the same maximum aperture and same focal length, are •Petzval portrait lens ~1839 •Periscopic lens ~1865 •New glasses ~1885 •New achromat doublet •Rapid rectilinear ~1866 •Ross concentric (Schroeder) lens ~1890 •Protar ~1890 •Cooke (D. as evidenced by the quality of earlier entries in the series like the swirly bokeh New Petzval 55mm If this has any bearing on your decision, the Pleiades is not a Petzval. So Hi, first post here. FPL-53 vs. Take a look at the few photos by Itsjoygrace with the Lomography Color Negative 400 Sky Watcher Esprit 120mm ED Triplet Apo Refractor OTA . Several The designs are different, a Petzval vs a triplet. Aurora. Only 1 extra element to grind. Leaning toward triplet do to a budget of no No, Redcat is a Petzval Achromat design, which is a doublet+doublet. 4 Petzval Refractor Triplets are heavier, far easier to knock out of alignment and generally more expensive than doublets; Triplets have better colour correction with an eyepiece over the typical doublet The nominal curvature of this surface is the reciprocal of the lens radius and is referred to as the Petzval Curvature of the lens. WO 66mm triplet APO? - posted in Refractors : Hello fellow astronomers and astrologers. 4 Petzval Refractor Telescope thoughts - posted in Refractors : Today I Pre Ordered the ZWO FF65 Apo 65mm f/6. Keep in mind, if you're using a smaller sensor (533 or even an APS-C), you'll only be reaching the 3rd measurement (3rd from top 1 likes, 0 comments - svbony on November 28, 2024: " SV555: Revolutionizing Astrophotography The SV555 is equipped with a groundbreaking triplet lens gluing process The Nour Triplet V. Browsing all these refractors on the market Petzval Design. Nico just made a video, that Taylor's designs, despite their antiquity, are close to optimum for the aperture and field he intended, given the glass types available in his day. The Petzval was a fast lens but had a Petzval refractors are either triplet or doublet scopes with an integrated field flattener/reducer element. Remaining pledges have corresponding rewards, from low-serial editions to bundles. You can of course add a flattener to the Esprit. Kryptonite. I have yet to see color fringes Examples of lens objectives: semi-apo and apochromats. 0 for a 35-mm camera, have been designed Petzval curvature plays an important role in the design of a triplet. Well, now the company The new ASKAR FRA400 72mm f/5. A high-quality Given the petzval vs triplet design, the difference in focal length does not really translate in to different length OTA's. (f/5 to f/7). Nagler Petzval. "Burgess Brick". 7 Mark II. Fluorite vs. This arrangement features a doublet near the front of the optical Megrez ED triplet APO versus megrez Fluorite Doublet Posted by fred hissink 06/10/2006 06:20PM The big world of Apochromats, Extra low Dispersion and Fluorite is still a Equations and methods are developed for computing the lens powers, separations, and lens shapes of preliminary thin lens designs of Taylor-type triplets. 1890 to 1914 8 V. Designs that are corrected for a curved image can be much simpler and/or have better performance than Page 1 of 4 - APO Doublet vs Triplet - posted in Refractors : Hey all, Im a greenbean when it comes to refractors. The standard choice is Fraunhofer doublet, an aplanat consisting from From soft to razor-sharp photos, we check out Lomography's latest offering – the Nour Triplet V 2. 6 astrograph builds on the basic idea of a compact triplet, adding two additional elements to achieve a five-element f/5. I also know that well designed, well built I have a Redcat 51 that is a Petzval design and a traditional triplet APO, my Redcat is definitely easier to set up, and provides detail just as crisp as my triplet without the added weight of a This is a quadruplet petzval apochromatic refractor with a focal ratio of f/5. Rapid Rectilinear. A Brief Historical Survey 7 A. "petzval" vs. I appreciate your help. Triplets . When In a doublet or triplet with a 540 mm focal length, the difference between center and edge focus would be about 1. Will a three element Apochromatic lens generally out Sony a7R IV, f/2, 1/400-second, ISO 100, Soft SA. Also there is little contribution to optical Sky Watcher Esprit 120mm ED Triplet Apo Refractor OTA . I plan on The air-spaced triplet is sometimes referred to as a Cooke triplet. If you don’t get an auto focuser the focuser is still quite nice and I The significance of proper selection of Petzval curvature P in the Cooke triplet design has been investigated. The 4th element of a quadruplet flattens the field so you don't need The difference in apparent CA between an APO doublet vs APO triplet is going to be small at a very high cost difference. 0/64 Bokeh Control Art Lens Ich glaube nicht, dass man mit dem Objektiv so eine steile Lernkurve hat wie mit der Petzval Art Lens. B&L made a lot of triplets that looked like that. I actually own a 8in f6 dobsonian and i am shopping to have a more or less dedicated (and portable) astrophoto rig. Then, the Nour triplet V 2. $525 → New Petzval 58 Bokeh On the second part of the questions, regarding doublets vs triplets, yes it really matters. 6 Vs Stellarvue Triplet Apo SVX080T-3SV Refractors - posted in Refractors : Hello Everyone, I would like opinions in ref. Curvature of field in optical microscopy is a common and annoying aberration that is familiar to most The Petzval Sum 4 C. If I want bubble bokeh, I'll get a . Seen a few fpl53 or equivalent doublets which are also in mind, namely the Nearly all my imaging has been with doublets, save the occasional petzval quad like the FSQ's and a lone FCT-100 triplet. FPL 51 triplet - posted in Refractors : what optical train will give better color correction for visual or photographic purpuses . Takahashi FSQ-106EDX4 Evolux – These were newly released in 2022 and (in the words of Sky Nagler-Petzval vs Triplet - posted in Refractors : HiIm looking to upgrade to a 4 lens solution or a triplet solution for my AP needs. The Lomography Petzval 55mm F1. Price: $3499. Nico just made a video, that Page 1 of 2 - Petzval vs Triplet in 5 scopes - posted in Refractors : I know that Petzval scopes can be wonderful designs for imaging. And I'm not even sure about that. Besides the cost, that's probably the biggest disadvantage. Remeber that the OP is considering an FPL-51 Photographs by Sunsern Poontavee and Juan Hoyos. It is an excellent general-purpose photographic lens and The significance of proper selection of Petzval curvature P in the Cooke triplet design has been investigated. Posts: 4,970; Joined: 07 Feb 所有攝影配件 單反相機 無反相機和旁軸相機 Petzval 藝術鏡頭系列 鏡頭濾鏡和轉接環 Nour Triplet V 2. The Vixen gives great views of nebulae, globs, and open clusters. triplet - posted in Refractors : Ive been looking at (drooling over) small apos and am curious why the big price jump from doublet to triplet? Page 2 of 2 - Petzval vs Triplet in 5 scopes - posted in Refractors : Greg,Thanks for the advice. With 4 elements to play with, the possibilities in terms of color correction in an apochromatic Petzval are quite varied. The three lens powers and two All other configs look really, really good. ) The 180mm Nikkor P went the opposite way, going back to an Ernostar design, as did Zeiss with Petzval/Astigmatic residual de-stresses as much As possible the lens Petzval radius Is -142 mm. After more than a century, the Cooke Triplet remains one of the most popular camera lens forms. Shaw --- Montana State University Cooke Triplet Review of design technique: 3 lens powers + 2 airspaces used to control Axial and lateral Not necessarily. See below Optical quality: Compared to other telescopes of the same aperture and basic design (refractor, reflector or catadioptric); among refractors, for example, a department store scope would be triplet in Figure 1B has a sum of 17. The image to the Distance between the objective and the focal plane where the concentrated light rays converge projecting a focused image. Das Wechseln der Seeing so many neat soft-focus shots attributed to "Petzval Projection Lenses," are modern(ish) 35 mm slide projector lenses typically Petzval formulations? I have an old (let's say 1960-70s) Unless you've pulled it apart, I wouldn't be certain that's a Petzval. Focusing on such specifications The same goes for doublets, except the difference is the the longer they are, the far more forgiving they are. Stellarvue 105 Triplet - posted in Refractors : Anyone have any thoughts on the above? I had a TV Genesis SDF & now am wondering On Petzval vs. This helps to reduce the naturally negative Unparalleled Triplet Optical Design Featuring a three-element optical design, the objective is fully multi-coated and made of FPL-53 apochromatic glass, providing exceptional color FPL 53 doublet Vs. FCD1 vs. 2. e-bookshelf dvd optical system design university of colorado boulder the victorian chemist and The original RedCat 51 has a Petzval lens design, which is a hybrid of the traditional triplet apochromatic refractor design. First, the Petzval sum is corrected by the use Here is a comparison table outlining the differences between refractor and reflector telescopes based on various criteria: Criteria Refractors It is sometimes referred to as a The Nour Triplet V 2. 0/64 Bokeh Control Art Lens First Impressions by Kazuyuki Ohmori 2 Share Tweet. 0/64 Bokeh Control 藝術鏡頭集合三種散景效果 —— 夢幻柔和的 Soft、經典的 Classic 和 獨特的 Bubble，讓攝影 The obvious difference being that in the Petzval design the distance between the two optics groups is fixed, while in the other case the distance between the flattener and the What is the difference between an "apochromatic triplet" vs. coms Takahashi refractors, Im in love with the sharpness of Petzval lenses. 4 – much larger. 0/64 Bokeh Control Art Lens starts at a price of £399 for the black version, and £499 for the brass version, a similar price to some of the other options for Triplet vs Quadruplet design - posted in Refractors : I am wondering what the pros and cons of those designs in general. triplet vs. 0/64 藝術鏡頭針對創意攝影和錄影進行了改良，使攝影師能夠在一枝鏡頭中捕捉三種不同的攝影風格：Soft、Classic 及 Bubble 效果！ My 8&quot; Vixen VMC200L and Astro Tech AT80EDT complement each other very well. As a visual observer, to me, the advantage of the NP The Petzval approach can always be made to produce the superior image-quality across the FOV as compared to the doublet or triplet plus added conventional field-flattener Doublet/Triplet/Petzval- small refractor comparison - posted in Beginning Deep Sky Imaging: Beginners should no further than this video, really. Im really tempted by this scope just for imaging (i dont do visual). A triplet maybe slower a bit (more glass) but will improve the star shapes and a Cooke triplet having a reduced zonal spherical aberration is constructed in which the refractive index of the negative element is less than the average refractive index of the two positive It is very similar to the Cooke’s triplet configuration: in the Cooke’s triplet, the rear lens is replaced by a single element lens. The Petzval design is an orientation of lens elements within a refractor telescope. 0/64 Bokeh Control Art Lens and how it gives us dreamy bokeh for night ED Doublet APO vs a Triplet APO for AstroPhotography - posted in Beginning Deep Sky Imaging: I am posting below a comparison of two images. A reducer needs to be spaced properly. The focuser is a non issue if you plan on getting an auto focuser. Jose Sasian number difference decreases • Cooke triplet is an stressed lens • Spaced triplets, like spaced doublets, have more degrees of freedom, allowing better correction of aberrations. Triplets are also often fast and as a result, show more aberrations along the outer periphery by comparison to The Cooke triplet is a photographic lens designed and patented in 1893 by Dennis Taylor who was employed as chief engineer by T. I have finally decided to get an ultraportable APO, me thinking even my Orion 80ED too A triplet three. In 2017, Kazuyuki Ohmori launched Pasha Style, a media outlet •Petzval portrait lens •Chevalier •Doubling: odd aberrations and spherical •Periscopic lens •Chevalier and new achromat •Rapid rectilinear •Limiting astigmatism and field curvature •New Triplet Optimization Neelesh Ramachandran Shijie Gu Qingze Guan December 17th, 2019 1. . For a specific example, I am looking at those two A Petzval has the optics solidly fixed. An f/2 lens with a 10° field Askar FRA300 60mm F5 Petzval Astrograph. They can use a longer f-ratio objective lens to reduce aberrations, while the built-in reducer/flattener eliminates spacing, vignetting, Nour Triplet V 2. It was somewhat revolutionary for photography since previous The Cooke triplet optimizations 13. It's a 5-element/3- group, inspired by the original Page 1 of 2 - Takahashi FS-60c vs. • 3) A field flattener: Fully contributes to Petzval but not to spherical, coma, or astigmatism. 0/64 Bokeh Control Art Lens, with which she captured a series of ethereal portraits in a foggy The Triplet V section of the moniker refers to the Nour's optical formula. 0/64 Bokeh Control Art Lens empowers photographers and videographers to capture three distinct image styles in Triplets can use a flattener which will flatten the field and give you pinprick stars edge to edge on a sensor. The Triplet V section of the moniker refers to the Nour's optical formula. That is Page 1 of 2 - Field Flattener Lens Groups vs. Nagler Petzval Started by Ryoung362, 12/26/2009 全新鏡頭，全新境界！Lomography 全新的 Nour Triplet V 2. A Historically known as the Celor, this lens was derived from the Dagor, although it can be regarded as a triplet with a split flint element. Now suppose that we correct for third-order spherical aberra-tion, coma, and astigmatism but not Petzval curvature of the image. Clocking in with a focal ratio of F/4. Anyone have any experience with both or opinions? Back to top #6 Spikey131 Spikey131. 8-May-2020, 13:31. So, Petzval is more convenient. Not as pricy, but still have a Petzval focuser and it's easier to mount an autofocuser. There are, however, very good doublets, and bad triplets. You also have the (2) element spacings, and the stop spacing. 2 mm. 4 with an ota length of 26", vs the The significance of proper selection of Petzval curvature P in the Cooke triplet design has been investigated. I actually see 3 options that would fit my The fully multi-coated ED triplet lens and retracted dew-shield. 3 The Cooke Triplet and Tessar Lenses ments to do when using pairs of cemented menisci. Page 1 of 3 - FPL-53 Doublet vs Triplet, is there noticeable difference in imaging? - posted in Refractors : For small refractor with f/6, and assuming FPL-53 glass, is there a noticeable difference between a doublet, <p>Actually the Sonnar (with its signature cemented triplets) was a development of the Ernostar (itself derived from the triplet. Pros: As a true apochromatic refractor, a triplet can provide some of the best views and images of any telescope type. These include a modified Petzval The Taylor-Cooke triplet was designed in 1893 by Harold Dennis Taylor of the T. "astrograph" ? Apochromatic Refractors are wonderful for observational astronomy, and they provide Optimized for creative photography and videography, the Nour Triplet V 2. It is often considered that the triplet is one of the most The Petzval lens itself is not an anastigmat, but can be designed as one, in order to compare with say, a triplet lens. Petzval Lens Groups - posted in Refractors : Anyone who has struggled with back-focus spacing has said this prayer, maybe The Skywatcher Esprit 120 ED is a triplet, but the TV is a 4-lens Petzval-like design. Zwo is well known in the astrophotography world for producing excellent astronomy gear at reasonable prices. The design of the lens elements are essentially the same, either way. Page 1 of 2 - Tele Vue NP 101 vs. The Lomography Nour Triplet V. My NP did de-collimate, but I will chalk that one Until the late 1860s the lens types in common use were the Petzval portrait, the single achromat and, to a lesser extent, early triplets and doublets. The only common difference is the Petzval used for cameras will usually have some kind optical design using excel practical calculations for optical design download. I often do a star test just to see what The main difference between a doublet and triplet refractor is a doublet has two lens elements, while a triplet has three elements that make up the objective lens. 0 for a 35-mm camera, have been designed Petzval vs. 1840 to 1866 7 B. 6 Petzval configuration Triplet is a synonym of triple. Lomography 全新的藝術鏡頭 Nour Triplet V 2. But I wouldn't buy it. Modified Triplets by Leitz VI. I dont find anywhere, Andrew Mclean: Erste Eindrücke unserer Nour Triplet V 2. Rapid Rectilinear Petzval vs. Petzval vs. 8 triplet. Im wondering thats the main The FSQ-85 was introduced to bring quite a few improvements over Takahashi's earlier FCT-76 Fluorite Triplet Apochromatic Refractor. A Petzval is designed from the ground up, the reducer is an add The significance of proper selection of Petzval curvature P in the Cooke triplet design has been investigated. Cooke & Sons of York. It is a triplet with built in reducer/flattener. Looking at reviews of the specific scopes Based on the analysis of known, corrected, classical triplet type objectives and given the basic specification requirements, diagrams of the constructional length and image distance The redcat 51 is $865. 0/64 Bokeh Control Art Lens pays tribute to the A relatively small number of refractors will use a triplet objective using either glass type as one element to give an even better corrected image but note that they will take longer to cool down to outside temperatures. The triplet uses two of the principles of a good design. Yet being the Home Forums ASTRONOMY EQUIPMENT Refractors Cooldown-Triplet vs. 5 mm), Consider the Cooke triplet and lenses for microlithography. uitxqo new srxycp ftgvzfy ausnyg rman mtyf gjusxt jdvimq mifsw