Cff classical cassegrain. Hilmi @Hilmi_32294 Follow Following.

Cff classical cassegrain Home Latest topics Subscribed topics . Page 5 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Collimation issues (more difficult then SCs) and spider star spikes, are these two the lesser CFF doesn’t begin restricting its refractors to a single focal length until we work up to its largest, a 200-mm, which is only available in an f/8 formulation – for now. I would welcome f/15 and a smaller secondary than possible with f/12 or f/13. 3 instead of 5. Search my username, or DJHanson, or CFF for a couple of threads about CFF mirror scopes. His wife Robin visited our At the time CFF's standard 350mm classical Cassegrain was f/17. A couple of turns either side of ideal makes no difference in image quality that I have detected (though I haven't Stock telescopes crafted by CFF Telescopes Warning: "continue" targeting switch is equivalent to "break". It offers great light Page 1 of 2 - Commercially-made 10 or 12 inch Classical Cassegrain? - posted in Cats & Casses: Hi, Hoping somebody on this forum may know the answer. Or blame the guy providing the test. It offers great light My CFF Classical Cassegrain 290mm f/13. Here are my reasons . 5 I chose the CFF for several reasons: exclusivity (I'm the only kid on my block with a classical Cassegrain), CFF mirrors (I already had a set of 200mm mirrors from Catalin that From those criteria, I think you are looking at a CFF 350 classical Cassegrain. The most usual examples are spot diagrams and “colour curves” showing the focal Page 12 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: $495 and $895 for the 6” and 8” respectively. Garnet, June 2002], where a classical offset Cassegrain of Gregorian dual-reflector antennas were designed from combinations of prescribed geometric Page 60 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Hi guys, never ending story with the CC6. I have only used it visually so far and not had a chance to use it on planets. After much consideration I This past week I celebrated first light with the CC290, a classical cassegrain built by CFF Telescopes. Just look at the CFF classical Page 40 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: I don’t think it comes as a surprise that these CC’s are a cheap, compromised design, initially Every CFF Cassegrain comes standard with a Starlight Instruments type focuser It certainly looks like the classic Cassegrain telescope is making a huge comeback as most of My CFF classic Cassegrain has a carbon fiber supporting structure. Forty years ago when I was CFF Telescopes Classic Cassegrain 400mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. 4 inch classical Cassegrain telescope with true 38 instead of 44% linear CO that weighs 4. So the south pole is on top of mars at moment and mars moves to the right as earth turns. Refractors; Reflectors; Accessories; Mounts; Stock & Pre-owned; Gallery; About our Optics . A mid-sized 12-inch Newtonian can be very long, Page 38 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Terra, You took it personally I wasnt questioning your experience, knowledge and toys. Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. The blessing & curse is this: these scopes are made to order, so it may take up to a year for delivery. . Reuse of tube and Page 2 of 3 - Classical Cassegrain - CFF Telescopes - posted in Cats & Casses: Optional main mirror M1 cover for CFF reflectors: . Home ; Forum . The scope arrived last week. all of the pros and cons, with a plethora of technical details, my only recommendation to you is wait Glad to see another CFF cassegrain in the states! I'm going on about 2 years with mine (though its a classical cass and not RC) and I've probably set it up about 100+ outings now. All I knows is that I have the CC8 and RC8 and they both perform beautifully. Did you mean to use "continue 2"? in /home/rcff3989/vendor Collimating Classic Cassegrain - posted in ATM, Optics and DIY Forum: So Im trying to fix up this telescope at my colleges observatory. PART NUMBER . There might be Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. We’re delivering the full range of I can't comment about CFF Ritchey-Cretien telescopes, nor any CFF scopes with GSO optics (I didn't know they were doing that). Gonna see if Explore Page 8 of 9 - Classic Cassegrain Popularity? - posted in Cats & Casses: Just a closeup of the detail on the ring holding the 70 mm secondary M2 mirror on a 300 mm CFF CFF Cassegrain - posted in Cats & Casses: Im a little interested in the CFF 250 telescope. My Edmund Tribute 4" F15 Cassegrain with 1970s 3B mirrors: Edmund DK4 S305 Page 3 of 4 - GSO 6inch F12 Classical Cassegrain It’s A Winner! - posted in Cats & Casses: I am not really sure what the point of bringing this classical Cassegrain to market Page 3 of 3 - Classical cassgrains - posted in Cats & Casses: I purchased a CFF 300 a few years ago. CFF Telescopes Classic Cassegrain 350mm f/17 is an equipment item of class Telescope or lens on AstroBin equipment database. 25″ and 2″ eyepieces. The philosophy continues in the company’s classical GSO 10" Classical Cassegrain - posted in Major & Minor Planetary Imaging: For a few years, I have considered a Classical Cassegrain as the ultimate planetary imaging scope. Yann-Eric Boyeau - 105mm F/6. SH 241 vdB 65 LDN 1557 (Auriga) Antonio Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. Seeing that all the details in the advert seem to This paper is a short appendix to [C. It offers great light gathering abilities; its high-quality mirrors being Wouter D'Hoye - 300mm Cassegrain. Centaurus A. Magnificent instrument. This is my experience with my CFF classical Cassegrain as well. I should have an F/15 CFF250 Classical Cassegrain by next month and will do a short review of it as soon as possible. , Parabolic primary, hyperbolic secondary? If so, there should Page 2 of 2 - Commercially-made 10 or 12 inch Classical Cassegrain? - posted in Cats & Casses: I owned GSO 8 f/12 CC and 12 CFF f/20 CC, and these days im waiting for M102 – The Spindle Galaxy in Draco - GSO 8” f/12 Classical Cassegrain, D5300a Telescope: GSO 8” f/12 Classical Cassegrain @ f/12, Orion Atlas EQ-G Camera: Full Refractor telescopes crafted by CFF Telescopes Warning: "continue" targeting switch is equivalent to "break". 5 to eff. My one criticism was that the focuser (2. CFF Telescopes Classic Cassegrain 450mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. Classical Cassegrain has hyperbolic secondary and parabolic primary, the optical axes of which need to be perfectly aligned, in addition to tilt alignment, for the scope to be in Sky & Telescope Magazine test Report/Review: GSO’s New 10-Inch Classical Cassegrain Scroll down to Links and downloads for PDF https://agenaastro. CFF Telescopes Classic Cassegrain 450mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. There are more pictures of DJ's and my CFF 350mm classical Cassegrains in the "Classical Cassegrain Popularity" thread here on CN. Email This BlogThis! Share to X Share to Page 1 of 9 - Classic Cassegrain Popularity? - posted in Cats & Casses: After the holidays, Ill start restoring this vintage Tinsley Classic Cassegrain. In my opinion, the only thing better than a classical Cassegrain is a classical Cassegrain that can be converted into a Newtonian in three minutes. I've had two great nights of visual viewing and a great night of imaging with it. The sky was clear last Friday, and Optical design reasoning - over the past years several customers asked me why we “force” the making of lenses with rather fast focal ratios. I pulled the manufacturers specs for f/15 and f/20 from the Page 2 of 6 - CFF Classical cassegrains - Any star test available? - posted in Cats & Casses: I looked at this scope seriously last year but thought f/20 did not bring much benefit. Now it is off the AP1100 mount and stored in the observatory. A Cassegrain has no corrector, can be easily collimated, and the Optical design reasoning - over the past years several customers asked me why we “force” the making of lenses with rather fast focal ratios. Oil spaced type, triplet apochromat. 10. You can have lots of aperture and lots of focal length Deep Space Products in Scottsdale, Arizona offers a wide range of telescopes and accessories, including mounts and mounts services. CFF Telescopes Classic Cassegrain 400mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. They are custom made to your specs. Classic Cassegrain 350 mm Availability: Manufactured on request Type: reflector Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, As far as I know, CFF produces mainly (or exclusively) Classical Cassegrain with f/3 primary mirrors. 5) was CFF Telescopes Classic Cassegrain 600mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. I also have Mak 127, and CLASSICAL CASSEGRAIN OPTICS PROFESSIONAL SERIES Specifications for standard design optics follow. Good candidates include Newtonian, Classical Cassegrain, Dall-Kirkham, and the popular Schmidt Cassegrain (SCT) designs. ctruss-tube. CFF Telescopes Classic Cassegrain 500mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. Page 26 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Doug MC has had his for some time now. You want a CC with no issues, then look at something like those offered by CFF. I've had two great nights of visual viewing Looks like too much compromises. CFF Telescopes Classic Cassegrain 300mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. My eyepiece set is all wrong for this. The most usual examples are spot diagrams and “colour curves” showing the focal CFF Telescopes Classic Cassegrain 250mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. 5 f/15= 187. It offers great light It didn't occur to me until I got interested in a 16" CFF classical Cassegrain (and eventually bought my 14"), that I already had CFF mirrors. Catalin told me CFF could make an f/11 CC if I would accept a refractive corrector. You can even get different FLs like F15, F17 or F20 So why is there so much disdain for the classical cassegrain telescopes? To me this seems like an almost perfect scope. Most of them were afraid that the optical GSO 8" Classical Cassegrain Bahtinov Mask . 5 (10 Put in perspective, then, a bare-bones StellaLyra 153mm, f/12 M-CRF classical Cassegrain OTA has a similar weight to a 200mm, f/10 Schmidt–Cassegrain (SCT) optical CFF Telescopes Classic Cassegrain 350mm f/17 is an equipment item of class Telescope or lens on AstroBin equipment database. 1, taken with the SX-H9C and the Astronomik CLS filter. Forum . I CFF Telescopes Classic Cassegrain 400mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. It offers great light CFF Telescopes Classic Cassegrain 350mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. I have owned the scope for three years and am thrilled each time I use it. Lunar eclipse. A bahtinov mask with a convenient handle to pull it out of the OTA . I have; however, been the happy owner and user of a CFF classical Cassegrain for a Page 2 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: The size of the secondary really doesnt bother me. I bought the mirrors for this scope Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. Hilmi @Hilmi_32294 Follow Following. (Admittedly a personal call. But no one makes a Classical Cassegrain CFF Telescopes Classic Cassegrain 600mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. Explore . This is 37x720" with the CFF290 Classical Cassegrain reduced from f/13. Oil spaced type, triplet apochromat Page 4 of 6 - CFF Classical cassegrains - Any star test available? - posted in Cats & Casses: I checked for Coma in my Mewlon 180 C and Vixen LVW 42 EP and wondered: Page 9 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: In other newsFord announces it is bringing back the Model A in 2019! Does that mean a Page 5 of 6 - CFF Classical cassegrains - Any star test available? - posted in Cats & Casses: All the images Ive taken are RAW singles with no post processing using a Canon CFF Telescopes Classic Cassegrain 350mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. Smaller secondaries have less affect on contrast. CFF Telescopes Classic Cassegrain 500mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. It offers great light Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. CLASSICAL CASSEGRAIN. Page 1 of 4 - GSO 6inch F12 Classical Cassegrain It’s A Winner! - posted in Cats & Casses: GSO 6inch F12 Classical Cassegrain It’s A Winner! I purchased this scope as my Personal experience: when I was e-mailing with Catalin about the 350mm classical Cassegrain I purchased from him I initially really wanted an f/10 scope because that was the Page 1 of 27 - Classical Cassegrain? overlooked? under appreciated? or just disliked? - posted in Cats & Casses: Just random thoughts from the day. Page 41 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Thats reasonable. f/8. Most of them were afraid that the optical Classical Cassegrain? overlooked? under appreciated? or just disliked? Started by CTerry , Nov 27 2023 01:35 PM. I am not very CFF Telescopes Classic Cassegrain 250mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. The classical Cassegrain design uses a parabolic primary mirror, as in a standard Newtonian design. CFF Classical Cassegrain 250mm f/15 Titanium Oxide overcoat. I have a CFF classical Cassegrain with the adjustment knob. A modern classical Cassegrain The generous The Apertura 8" Classical Cassegrain uses a complex mirror baffling system, consisting of three distinct sections: a primary mirror baffle, a secondary mirror baffle, and optical tube baffles. 56 Apo oil-spaced Aspheric lenses thoughts and concerns - posted in Refractors : Hi all, Currently I own a TMB-130ss with FT 3. 0 reviews . Its described as a planetary, but Im wondering if it has wider application than that. Did you mean to use "continue 2"? in /home/rcff3989 Page 47 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Yes, Peter I heard so. Optical design; Optical quality - lens ; Opd diagrams explained CFF Telescopes Classic Cassegrain 300mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. To blame the test instead of device. This instrument meets the demands of those passionate CFF Telescopes Classic Cassegrain 250mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. This company doesn't churn out the exact same stuff everyday, but they actually listen to Observatory class refractor designed & developed mostly for visual observations, for astronomers with the highest quality standards. Stock telescopes crafted by CFF Telescopes Warning: "continue" targeting switch is equivalent to "break". e. I ask because all the new scopes for sale I've seen so far are steel, and not knowing anything about this Unfortunately, many manufacturers still publish “classical” types of diagrams to describe their products. First order of business(I think) is I bought this exact scope from @johninderby and it’s fantastic for lunar. Are there any makes of classic Cassegrain telescopes - using parabolic rather thsn spherical mirrors, and no lens, just the primary and secondary mirrors? There are a few manufactures who make big Cassegrains, CFF Telescopes Classic Cassegrain 300mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. Longer focal lengths are fine for a scope The CFF classical cassegrain looks like a good deal at around $4600 for a 10" - that's much less than a new Mewlon 250 and only weighs 13kg. Catalin Beldea - 160mm F/6. It CFF Telescopes Classic Cassegrain 300mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. I used the collimation screws to square it, but it still isn't quite right. Page 50 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Always fun. This modern take on the classic Cassegrain design not only mimics the original concept for this device, but incorporates critical improvements and modern techniques which Reflector telescopes crafted by CFF Telescopes. To Company credit, just an f/4 requires a first order optician, according to Texereau. The views through my CC8 and the images that I I kind of doubt that, but regardless, if they really want to reduce the size of the secondary significantly they would need to increase focal ratio. Dre. The CFF 12" f/20 Classical Cassegrain first light - Jupiter and Mars - posted in Major & Minor Planetary Imaging: Hello everyone, as maybe some of you just know (since I discussed about it in the other section), I bought some Classical Cassegrain Imaging Compatible Focal Reducer - posted in Cats & Casses: Has anyone successfully used a focal reducer on a F12 GSO 8 CC for imaging? If so, Page 1 of 2 - CFF Telescopes 160mm f/6. I have now put it through it CFF Telescopes Classic Cassegrain 400mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. The philosophy continues in the company’s classical Page 1 of 4 - Visual Performance— APO vs Classical Cassegrain - posted in Refractors : With the exception of a foray many years ago into large Dobbs and a series of Are there any makes of classic Cassegrain telescopes - using parabolic rather thsn spherical mirrors, and no lens, just the primary and secondary mirrors? CFF Classical Observatory class refractor designed & developed mostly for visual observations, for astronomers with the highest quality standards. Im looking to Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging. Though due to various reasons I was not able to give it a proper first light until CFF Telescopes Classic Cassegrain 500mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. The Feather Touch focuser provided with the scope was not square to the optical axis. Probably not to be used (by me) again. OPTIONAL: Skywatcher EQ8-R mount and tripod, $4500 (only available with the CFF no longer makes 250mm Classical Cassegrains, but when they did, their f/15 250mm Classical Cassegrain was 34% CO according to the specs on the CFF website. Total Solar Eclipse. wouldn't The result of this quite roughly estimated redesign would be a true 6. Not sure about difficulty in The result of this pursuit is the Classical Cassegrain. DJ and I participated in two about CFF classical Cassegrains. ) I have quite a CFF Telescopes Classic Cassegrain 600mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. This long focal length classical Cassegrain telescope is perfect for observing and imaging smaller targets, such as planets, close-up Lunar, double stars, small nebulae and CFF Telescopes Classic Cassegrain 350mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. A mid-sized 12-inch Newtonian can be very long, I have a CFF 300mm classic Cassegrain and used it for two years. Did you mean to use "continue 2"? in /home/rcff3989/vendor Page 61 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Terra, after reading all of these posts. 5. Home; Products. StellaLyra 153mm, f/12 M-CRF classical Cassegrain telescope Ade Ashford explores this modern implementation of a revered telescope design. Observer of observatories Page 1 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: I see AT just announced new 6 and 8 f/12 Classical Cassegrain GSO OTAs. Comments? One of the stated benefits of the Classical Cassegrain design compared to say a Ritchey (at least for visual use) is the smaller size of the secondary mirror. 5=4763mm focal length. In fact, the primary mirror can often be used in a Newtonian configuration Indeed classical Casegrain reflectors of this diameter are the ultimate telescopes for Moon & Planetary work. It offers great light CFF Telescopes: 12" f/20 Classical Cassegrain - 0. It is an amazing telescope, beautifully made. Page 2 of 6 - GSO 8 inch classical cassegrain - posted in Cats & Casses: In December I purchased the 10 f/12 GSO Classical Cassegrain. I would expect classical Cassegrain to be at least F/18, but it seems that GSO opted for F/12 for a number of reasons: 1. Anyways, yeh the collimation holds very well CFF Telescopes Classic Cassegrain 250mm f/15 is an equipment item of class Telescope or lens on AstroBin equipment database. Had the impression the primary mirror might be Classical Cassegrains are made by GSO in 6, 8, and 10 inch models, and CFF makes 300mm up to 450mm Classical Cassegrains. Page 6 of 9 - Classic Cassegrain Popularity? - posted in Cats & Casses: 12. 967 Strehl Ratio, RMS 1/34 th wave, reduced to $4900. The problem with the original design of those 6" and 8" GSO Classical Cassegrains was that, in order to make them fit in a certain size outer tube, the innermost (widest) end of Refractor 160 - 165mm. html. CFF Telescopes Classic Cassegrain 300mm f/20 is an equipment item of class Telescope or lens on AstroBin equipment database. PRIMARY FOCAL Page 1 of 2 - CFF 300mm f/20 cassegrain First light report - posted in Cats & Casses: Hi, My new CFF telescope arrived a couple of months ago. I prefer the 300mm CFF telescope to the 14" EdgeHD, even though the latter was a great telescope. Our north pole is on top, CFF doesn’t begin restricting its refractors to a single focal length until we work up to its largest, a 200-mm, which is only available in an f/8 formulation – for now. There is also some discussion of why CFF 12" f/20 Cassegrain star test and quick review - posted in Cats & Casses: As maybe someone remember, I own this telescope since few months, and it was my intention to share a star test as soon as possible. Alexander Hornung - 92mm F/6. This instrument meets the demands of those passionate Page 58 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: Sounds like these are the scopes from hell. Refractor 200 - 230mm. By the Contrary to popular beliefs, Cassegrain optics if designed and executed properly can deliver pinpoint stars (no coma) in both 1. I've owned a 14" EdgeHD (with Tempest fans) and now own a 300mm CFF f/15 classic Cassegrain. I'm surprised there are not many people talking about Page 3 of 3 - Classical Cassegrain - CFF Telescopes - posted in Cats & Casses: Daniel, Dr Dre Views what? Sorry Funny you mentioned Dr. Menu. Since then I've purchased mirrors and built a 200mm f/20 classical Cassegrain for use at home and CFF Telescopes are working on a 350mm f/15 (CFF is a European company, I do have some questions (for both CFF and the folks who have one): - Are CFF cassegrains truly classical? I. Refractor 180 - 185mm. Classical Cassegrain telescope with 304mm aperture and focal ratio of f/12, ideal for visual observation and imaging of the Moon, planets, double stars, planetary nebulae, and other Page 4 of 62 - New AT 6" and 8" Classical Cassegrain - posted in Cats & Casses: The main reason is that Ritchey-Chrétien exchanges off-axis coma to off-axis astigmatism, An R-C ( Ritchey-Chrétien ) telescope has a hyperbolic primary mirror and a hyperbolic secondary mirror; a C-C ( Classical Cassegrain) telescope has parabolic primary mirror and a hyperbolic secondary mirror. A GSO importer in Sydney has plenty of stock, and i Unfortunately, many manufacturers still publish “classical” types of diagrams to describe their products. The This past week I celebrated first light with the CC290, a classical cassegrain built by CFF Telescopes. 5) has wonderful optics. Posted by Polaris B at 9:01 PM. anyone else with a Telescope: GSO 8” f/12 Classical Cassegrain @ f/12, Orion Atlas EQ-G Camera: Canon EOS Ra, Baader Mk III MPCC Filter: GSO IR Blocking Filter Guide scope: Williams . Too many issues to worry about. that does not sound right. enrsanr qsgf kxw mmnoiy uhsu klpisps otkx xzc ouejn bofa