The system has been checked using the equipment described above, a gm8 mount, a c8 ota with focal reducer f6. This is not an actual pe measurement, but is representative of what you might see. Gm8 equatorial mount with tripod and dual axis drive. The amplitude is reached over a broad smooth period, not jerky or rapid.
The predictive pec algorithm will eventually deduce the worm period. With welded construction and 3 inch diameter legs, the g11s tripod is rock solid. The gm8 is a great equatorial mount for telescopes with total instrument weight up to 30 lbs. Losmandy g11t german equatorial mount with dual axis motors, gemini 2 positioning system with hand pad and hd tripod. Company seven losmandy gemini go to computer control. As it turns out, the cables havent been of a problem. The losmandy gemini 2 upgrade kit includes a touch screen hand controller and the main control unit. The losmandy gm8 gemini ii goto dualaxis electronics. Apologies for starting another guiding problems thread, since starting to guide i have been unable to achieve good guiding in the declination axis and im hoping someone may have some ideas. Losmandy g11 goto mount with gemini 2 electronics and tripod. Click for larger image gm8 equatorial telescope mount elevation adjustment. The most recent version of geminis software, level 4, is provided with all. The gm8 is his lightweight mount that is well suited for stellarvue telescopes mm and smaller in size.
Review of losmandy gm8 telescope mount update 5may20. The primary aim was to take colour ccd images at focal lengths from 1700mm and higher. All black anodized, machined alumnium and stainless steel mount. Although there may be small delay or jitter caused by the serial transmission, it should be. As an alternative, losmandy offers the gm8 g gemini 2 goto mount. Known for their stunning design and their ultraprecision mechanics, the mounts also lead the way with their powerful gemini 2 goto software, onboard. A widely known imaging secret is that most fixed worm drive mounts like the losmandy g11 and gm8 will get an impressive reduction in pe if used with a scary amount of worm backlash and an east imbalance to keep the worm loaded on one side of the worm screw while imaging. Below are the guiding graphs for three separate nights, the top two were in a similar part of the sky, m33. This set does not include everything from the full gm8 gemini system. One of the things i wasnt looking forward to was having external cables between motors and control box, then to the hand controller and battery. Guide camera wise, im thinking of running a 60mm or 80mm refractor as. I bought my losmandy gm8 from telescope house and decided to choose the gemini option. All machined aluminum and stainless steel, black anodized.
Featuring a splitcapable mount, the losmandy gm811g modular equatorial mount package makes setting up more manageable. Note that the smooth data block is checked and the raw data is not. Losmandy gm8 w gemini system expert service financing. Losmandy g11 mount with digital drive electronics the g11 is a mount with outstanding reputation wordwide and for good reason.
Losmandys orginial gemini system is a dc servo motor based goto computerized positioning system designed for the losmandy hgm200, g11 and g8 mounts. The new equatorial position system is the losmandy gemini 2 system. In ron wodaskis book, he says the losmandy gm8 is useless, and even the g11 is a mediocre performer. Remove the counterweight safety thumbscrew and washer on the end of the counterweight bar opposite the end that attaches to the mount. Losmandy mounts driven by servo motors provide far more torque and accuracy than mounts using stepper motors. Explore scientific losmandy g11 pmc8 goto equatorial mount. The system can be ordered with all new losmandy mounts, or easily retrofitted by users who already own a g8, g11 or hgm200 mount. Eligible for scope city rewards at checkout special order item please read terms page before placing order. Losmandy gm8 equatorial mount gm8s telescopes at telescopes.
Owners of a losmandy gemini system are entitled to upgrade to the current software. Losmandy g11 goto mount with gemini 2 electronics the g11 is a mount with outstanding reputation wordwide and for good reason. The upgraded maxon dc servo motors supplied with the gemini 2 have higher torque through their entire range of tracking and slewing speeds than the motors on standard losmandy mounts that dont. Id say his book was written before the eq6pro came out, so i dont know what hed say about that mount. The losmandy gm8 is portable and im able to move it around with the tripod and mount connected together. The biggest challenges to unguided exposures are polar alignment and worm periodic errors. This heavyduty mount is machined of aluminum and stainless steel, and has all sta. This is as compared to a mount like the sphinx where most cables are internal. Losmandy g11 mount with digital drive electronics no tripod. Learning by experience and responding to increasing demands from demanding astrophotographers the g11 was improved over the years so that it presently provides payload capacities of up to 6. Losmandy gm8 dec losmandy g11 ra gemini 2 goto system counterweight shaft 1 11lb. Review of losmandy gm8 telescope mount rogers website.
If you have the g11 fitted with gemini and have the losmandy polar scope, then you may have noticed that if you adjust the polar scope so that it rotates nicely with the ra clutch loose, then when you tighten the clutch the polar scope starts binding. Explore scientific losmandy g11 pmc8 goto equatorial. Thanks to high built quality and gemini 2 computer, if offers the most advanced features requested also in astrophotography and low periodic error, all in a compact and portable mount mounts head weights only 15 kg. Counterweight, gemini 2 goto system, and folding lw tripod. This high quality and welldesigned mount work in conjunction with a topnotch tripod and the superb gemini system hand controlle. The losmandy gemini 2 system is a dc servo motor based goto computerized positioning system designed for the losmandy hgmtitan, g11, and g8 mounts. Builtin polar alignment, periodic error correction, and model building wizards. Dual supported, ball bearing housed ground high precision brass worm.
The losmandy g11 mount losmandy astronomical products. The losmandy gemini system is a dc servo motor based goto computerized positioning system designed for the losmandy hgm200, g11 and g8 mounts. Its a fairly heavy lump but doesnt present too much of a problem if only being moved from the house to the garden. Losmandy worm upgrade for g11 and gm8 mounts from where you find the best from losmandy astronomics equipment and accessories right here a. Dimmer on control panel, illuminated control panel. I see there are locking bolts for altaz and securing to the tripod requiring an allen key. Unlike other methods that require you to find the celestial pole by identifying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed. If you are an astrophotographer looking for a high quality mount to support your telescope, the losmandy g11 is for you. The gm8 mount head also has the tucked motor upgrade for both the ra and dec axis.
Fully locking, unique tangent arm design altitude adjustment, 068 degrees, large knob for. The gm8 is a fine german equatorial mount, solidly built and capable of carrying an 8 sct without difficulty. The losmandy gemini 2 system is a dc servo motorbased goto computerized positioning system. Losmandy gm8 s german equatorial mount wiith stepper motor. Losmandy gm8 s german equatorial mount wiith stepper. An excellent combination of size, portability, and full goto capability make the gm8g a great choice for an imaging mount on the go. Declination guiding problem imaging tips, tricks and. Page 1 of 2 so tell me about a losmandy gm8 posted in mounts.
You need an 512kx8 eprom in the dip32 package, up to 120ns access time, 150ns usually works, too. Software guiding an alternative to using the autoguider port is to write your own software to send guiding commands over the serial connection using the popular lx200 protocol. The gm8 is his lightweight mount that is well suited for stellarvue telescopes mm. Mount worm period info openphdguidingphd2 wiki github. For example the gm8 has an 8sec slew rate and 5 arcsecond positional accuracy.
Losmandy gm 8 g equatorial head, gemini goto, weight shaft. The losmandy gm 8 can be loaded with up to 15 kg telescope weight. Nowadays, with the ccd advent, it is practically imperative to use a computerized scope with goto capability. I recently acquired a new losmandy g11 mount to complement a new c11 ota. Taking wide field images of the heavens is now quite an important part of astrophotography with photographers travelling to dark sky sites with minimal equipment to capture what can be stunning images of the constellations and the. Losmandy gm8 equatorial mount with tripod telescope. Thats how you find bad worm bearings or bearing alignments, etc.
Pec is designed to improve photographic quality by reducing the amplitude of the worm gear errors. Hi ji, so is your g11 is a pmc8 retrofit or an early g11pmc8 mount. Three astrophotography tracking mounts professor morison. For visual observation, when fitted with the gemini goto system, it is likely one of the best value proposition in the usa. The losmandy gm8 is the smallest mount in the losmandy range but it still boasts and impressive 30 40 lbs payload. Hi all, so im seriously considering an upgrade from the avx to a losmandy gm8 without gemini. The losmandy gm 8 mount can be adjusted from 0 to 64. The gm8 presents more of a challenge than the g11 given its smaller main gear diameter and therefore greater periodic error 22 arcseconds typically from what my mount does and what others have reported online. This shows about 4 worm cycles on my gm8 mount where each cycle takes 480 seconds. Three astrophotography tracking mounts this is just one of many articles in the authors astronomy digest. Losmandy has updated the gemini goto system to include a newly enhanced cpu and increased memory.
Periodic error is a slight oscillation in right ascension caused. When one employs the periodic error control circuit of the gemini, specialized software. Losmandy gm8s equatorial mount with stepper motor drive the losmandy gm8s is ideal for all amateur astronomers who want to use a highquality mount for astrophotography, without goto but with highest precision. Also and especially under the housings, scott losmandy uses firstclass parts. Remove the counterweight safety thumbscrew and washer on the end of the counterweight bar opposite the end that attaches to. No matter how precise, all telescope drives will have some periodic error, though it is already extremely low on the losmandy g11. Losmandy also produces equatorial position systems. The raw data shows the position as captured, and adds a lot of noise to the graph. The gemini 2 system has many features designed to quickly and accurately point the telescope to an object, then track it with even higher precision than the previous digital stepper drive used by losmandy.
Losmandy gemini retrofit kit for gm8 g11 hgm200 g9. Losmandy gm8 equatorial mount with tuckedin motors, lw tripod. This heavyduty mount is machined of aluminum and stainless steel, e. The losmandy g11 offers all the advanced specifications needed for a mount able to support also heavy telescopes, up to 27 kg. The losmandy gm8 mount is a highprecision portable 30 lb. Through the axis polar scope mounting, works in northern and southern hemisphere. The losmandy g11 mount and tripod is a top performing astronomical instrument that has withstood the test of time. The losmandy gm 8 mount losmandy astronomical products. Porter slipring design, this german equatorial mount is manufactured with allmachined aluminum and stainless steel, and finished in black with a durable hard anodize. Losmandy gm8 w gemini system a timetested mount, proven strong by years of dedicated service and refinement, the losmandy gm8 doesnt know how to disappoint anymore only how to perform. Including a fully locking, unique tangent arm design altitude adjustment for between 668 degrees, with a large knob for easy alignment. Company seven losmandy gm8 and g11 mounts description page. Orient the mount so that the counterweight bar points toward the ground.
Axis all machined aluminum and stainless steel, black anodized. Also i have to strongly disagree with ron wodaskis claim that the g11 is a mediocre performer. Losmandy losmandy gemini 2 upgrade camera concepts. Losmandy gm811g modular equatorial mount w lw tripod. Losmandy gm8 mount with gemini goto systemlogm8goto. Losmandy gm8 and g11 german equatorial mounts since its introduction in the spring of 1992 the losmandy model g11 german equatorial mount has come to represent the best value in its class and a particularly attractive choice for those who require a high degree of tracking precision and reliability. The worm period on the gm8 is 8 minutes, twice as long as the g11. Losmandy losmandy gemini 2 retrofit kit for gm8, g11. If youre tired of messing around with equatorial mounts that just cant handle your observing and imaging requirements, the losmandy g11 is definitely worth a look. Perhaps most impressive is the interactive color touch screen that comes with the losmandy gemini 2 goto system. That means that for any given 3 minute exposure, youll only be using a portion of the worms turn. For astroimaging with telescopes of this size we recommend the gm811g as the best solution since it has the same ra gear as the.
These high quality mounts are perfect for your telescope and come packed with a variety of features. The losmandy gm8g is a fully computerized equatorial mount head with the losmandy gemini 2 goto system. Used gm8 and lightweight tripod cloud break optics. Of course it is a significant improvement in quality and performance, but i just have a few questions how is setup time. In order to make this a complete system, these additional par. Losmandy gm8 s equatorial mount with stepper motor drive the losmandy gm8 s is ideal for all amateur astronomers who want to use a highquality mount for astrophotography, without goto but with highest precision. Company seven losmandy gm8 and g11 mounts description. Losmandy gm8 german equatorial mount with the gemini computer. All of the spare parts can be ordered and shipped separately.
Losmandy gm8 is a mount that i can easily maintain and even repair myself if the need arises. Losmandy g11 german equatorial mount with dual axis motors and gemini 2 positioning system with hand pad. Available only as the g version with the gemini 2 goto system. The amplitude makes it more difficult but not impossible to perform long term exposures, even when autoguiding.
Losmandy gm8 equatorial mount rother valley optics ltd. This mount and tripod are in great condition and includes a rolling hard case for the lightweight tripod. Losmandy g11 equatorial mount w gemini 2 goto system. As an alternative, losmandy offers the gm8g gemini 2 goto mount.
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