Sct focuser

Many users find the primary mirror focusing mechanism of Schmidt-Cassegrain telescopes SCT cumbersome to use.

There is some amount of image shift and precise focus cannot be found easily. This is inconvenient for visual use and a serious problem for astrophotography. GSO's Guan Sheng Optical latest Crayford focuser model is a gorgeous, all-black, rotatable focuser for Schmidt-Cassegrain telescopes that elegantly solves these problems. This dual-speed Crayford focuser is a joy to use and you will wonder how you ever lived without it once you install it!

You will experience very smooth and precisely controlled focuser motion. The inner drawtube glides on 4 precision bearings and a roller shaft. The inner barrel is baffled and painted a flat black to minimize reflections for maximum contrast. This barrel is also black anodized and features a laser-etched mm millimeter scale. It provides 1" of focus travel which is more than adequate for SCTs. You first use your SCTs focusing knob to achieve coarse focus zwift inc then switch to the Crayford focuser for finer focus and control.

Depending on your range of eyepieces and accessories, you may never need to touch your SCT's main focuser again!

The 2" focuser barrel features a brass compression ring and can accept standard 2" refractor-type diagonals and other 2" accessories Note that the use of this focuser converts your telescope's rear SCT thread to a 2" visual back. As a result you will not be able to use an SCT-type diagonal with this focuser; you will need a refractor-type diagonal instead.

Also included is a 1. GSO's rated load capacity for their Crayford focusers is a little less than 6 lbs 2. The focuser also has two large thumbscrews.

MoonLite CS 2 inch format focuser for SCT/ RC/ Solar Scopes/ Tak Mewlon

The thumbscrew on the telescope side can be used to lock the focuser, allowing the use of heavy accessories or cameras without fear or slippage or losing focus. The other thumbscrew on the eyepiece end can be used to adjust the tension of the focuser to achieve a focusing "feel" that you like. At the easiest lightest setting, the focuser moves extremely smoothly.

At tighter settings, you can still use heavier accessories without sacrificing much of the smooth focuser action. If you have a standard 1. The focuser is shipped in a foam-fitted box. This is caused by wear on the barrel anodizing where is makes contact with the roller bearings. In some focusers, you have to look hard to find these marks.

In others, it is very prominent, even for brand new items received from GSO. This does not indicate a defective or used product and is essentially just cosmetic.

This focuser will not fit those, and there is no way for us to know what threads you might have on your telescope.You are visitor number. The question is, what rate of focus change should the manufacturer have chosen?

sct focuser

There are two rates-of-change of focus needed by scope users:. This is a mutually exclusive pair of criteria for scope manufacturers to achieve - no matter which one they choose, many users will complain that they chose the wrong rate-of-change of focus position.

But there are a number of ways for you to meet both of these requirements with an SCT, as described below. The classic way to do this has been to purchase a grommet that fits on your focus knob, and then drill a hole in the top of the lid of a peanut butter jar, into which the grommet fits.

A nicer alternative is sold by ScopeStuffwhich offers a 2. I have one and it is very convenient when I just want to do visual observing but a motorized focuser is essential when doing astrophotography. You will be able to distinguish these products very easily by looking at their respective prices - see the next paragraph Both are designed to thread onto the rear cell of an SCT.

The large external motor has been replaced by a smaller integral motor and the addition of manual adjusting knobs. Note that the NGF-S comes with a small keypad shown on the right to control the direction and speed of the focus motor.

You may replace this with a controller that provides a digital read-out of focus position. In this case JMI adds a position encoder to the focus motor unit similar to the encoders within the two drive axes of GoTo scopes, that tell the computer which way the scope is pointing. There is then a different hand control unit shown on the left which controls focus direction and speed but also provides a digital readout of focus position.

This is very slick, but also rather pricey. Note that astrophotographers have major heartburn with this digital readout system because the hand unit forgets its settings when it is turned off.

sct focuser

This makes it difficult to return to specific focus positions from night to night, which basically was the original purpose of the digital readout. The problem with the 6-conductor cable is that it is rather stiff and tends to get in the way when you are using your scope. I do think the DRO option is way too expensive for the value it provides.

On the other hand, at the total price for this setup you should also consider the Robo-Focus system described at the bottom of this page. The problem with the standard Celestron or Meade Visual Back adapter is that it provides a 1.

When they sell you a scope with the standard 1.

First Use of the Celestron Focuser on my SCT

There is, however, an inexpensive replacement solution to this problem. Presumably, other reputable filter brands besides Hoya would also fit well, but I bought the Hoya and since it worked I had no reason to test any others.

The MFC8 includes the focus motor shown above, and a replacement focus knob for your scope, that accepts the focus motor. This Motofocus also includes the small keypad described in the NGF-S discussion above, to control the direction and speed of the focus motor.

An upgrade to the Motofocus is to add a mechanical read-out of the focus position to the basic MFC8. This is useful when you are immersed in Fastar astro- photography and you want to get back to the focus positions that worked for you on previous nights.

A third electric focus option is to add the electronic read-out of the focus position also described in the NGF-S discussion above, rather than the mechanical one. Robo-Focus Many astrophotographers using the Celestron Fastar system have found that the most precise focus is achieved with the Robo-Focus system made by Home-Dome.

As shown on the right here, this unit adds a focus motor that moves a substitute focus knob through a belt drive.

sct focuser

This unit can be very precisely controlled through a computer. Back to Astrophotography Accessories.This electronic focuser enables precise, dynamic focus control for planetary and deep-sky imaging. Read Online Download. Before first usage of this product read manuals and install correct drivers and software.

Our planetary cameras are among the most used planetary cameras in the world.

TPO 2" SCT Focuser - Crayford Dual Speed

Ideal for all amateur astrophotographers working in the field. ZWO Atmospheric Dispersion Corrector significantly improve the quality of images or you live image in eyepiece. Mandatory for serious planetary observing and imaging. We guarantee the highest quality and technical support for all ZWO products.

Trusted by astronomers all around the world. Parameters: Size: 59mm x 52mm x 41mm Moter: Step moter, 35mm diameter, steps to rotate a circle. Power port: 12V DC 5. Usually you will get your package in one week.

It usually costs weeks to reach US or Europe and costs weeks to reach far places. Please note that buyers are liable to pay tax involvedsuch as Import tax, VATcustoms handling fee, etc.

The additional fees may be collected at time of delivery by courier. For best local service we advise customers buy our cameras form local dealers. If we confirm you can get a replacement, goods must be returned with all accessories, instructions, etc and must be suitably packed. If you get a faulty camera, please contact us as soon as possible though email: info zwoptical.

We will provide you RMA number if your camera requires warranty repair. We refuse any return without RMA number! For customers who bought the camera from our dealer, dealer is responsible for the customer service for you. Related Products. MM48 extender ZWO 2.Learn More More About Telescope Focusers Orion Telescopes stocks several telescope focusers designed with precision and durability in mind.

Whether you need a basic rack-and-pinion telescope focuser for your homemade telescope project or a premium Crayford-type model with dual-speed focusing as a performance upgrade, you have come to the right place. All Orion 1. Prices valid only while supplies last and are limited to stock on hand. Products on sale or subject to promotional offers are limited to two units per customer. Large volume orders are subject to special order policies — contact our Customer Service Department for additional details.

Now an employee-owned company, we pride ourselves on an unswerving commitment to best quality products, value and unmatched customer care. Orion offers telescopes for every level: BeginnerIntermediateAdvancedand Expert. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessoriesyou can find the best telescope for you. Because we sell direct, we can offer you tremendous value at a great price.

Not sure how to choose a telescope? Orion's Telescope Buyer's Guide is a great place to start. Orion binoculars are known for quality optics at a great price. We offer binoculars for every viewing interest, including astronomical binocularscompact binocularswaterproof binocularsbirding binocularsand sport and hunting binoculars.

Orion's telescope and astrophotography accessories will enhance your telescope enjoyment without breaking the bank. Expand your viewing experience with accessories ranging from moon filters to power-boosting Barlow lenses to advanced computerized telescope mounts. Capture breathtaking photos with our affordable astrophotography cameras.

And when you're stargazing, Orion's telescope cases and coversobserving gearred LED flashlightsastronomy books and star charts will make your observing sessions more convenient, comfortable and meaningful.

At Orion, we are committed to sharing our knowledge and passion for astronomy and astrophotography with the amateur astronomy community. Visit the Orion Community Center for in-depth information on telescopesbinocularsand astrophotography. You can find astrophotography "how to" tips and share your best astronomy pictures here. Community Cart 0.

All Current Offers. Great Picks for a Staycation! Sale Accessories. New Accessories.Scroll to the bottom of this page to see all of the options. The CS 2" format model uses a 2" comp ring for all connection to cameras, etc.

For an all threaded style connection, please consider the CSL 2. We offer the CS 2" format focuser in many configurations. Our shaft lock option provides focus lock with no image shift. Custom anodized colors and custom machining by request make for a perfect custom focuser to match your OTA. For customers imaging with large cameras or using large loads, please look at the CSL 2. MoonLite Nitecrawler 2 axis rotating worm drive focuser.

MoonLite's SCT focuser configuration for imaging uses a special design that allows a focal reducer to be installed inside the focuser by threading it into the drawtube.

The focuser is then installed on to the visual back. The focal reducer travels with the drawtube as the focuser is racked in and out providing the correct distance for imaging. See Video for installation of a 6. CS focal reducer install. We made a special 2-part split flange system to support a focal reducer installed inside the focuser. The installation procedure requires the user to remove the bottom rotating flange part, then install the focal reducer by threading it in to the drawtube.

The flange is then reattached to the focuser and the focuser can then be installed on the scope. Please use the pull down menu to select the flange located at the bottom of this page. All flange options are free. The rotating flange is made up of 2 parts. An upper flange part that attaches to the focuser body with 3 bolts and a lower threaded flange part that matches the SCT's visual back threads.

We make 2 versions of the lower flange part. A regular profile version and a tall Focal reducer style version.

All 2-part flanges have a rotating ability with a lock knob providing camera angle adjustment plus collimation adjustment ability. There are 2 category of flanges to consider Regular profile, and FR style. Basically the regular profile flanges are for visual use and the taller focal reducer flanges are for Imaging use. However the focal reducer does not have to be installed, so the tall focal reducer style flange can be picked if the scope is to be used for both visual and imaging.

It is important to pick a matching drawtube and flange combination when configuring the MoonLite focuser. All tall focal reducer style flanges require that the. The tall focal reducer flange types and the. This matched combination is for imagers that need to use a focal reducer.

However the optional long 1. The regular profile flange is ideal for visual users that will not need to use a focal reducer. The regular profile 2" size threaded flange does end up using the. The exception is the New 9. Celestron has not released a focal reducer spec for the EDGE scopes as of this time. We are getting ready to release a new CSL 2.Telescope eyepiece adapter 1.

Many users find the primary mirror focusing mechanism of Schmidt-Cassegrain telescopes SCT cumbersome to use. There is some amount of image shift and precise focus cannot be found easily. This is inconvenient for visual use and a serious problem for astrophotography. GSO's Guan Sheng Optical latest Crayford focuser model is a gorgeous, all-black, rotatable focuser for Schmidt-Cassegrain telescopes that elegantly solves these problems.

This dual-speed Crayford focuser is a joy to use and you will wonder how you ever lived without it once you install it! You will experience very smooth and precisely controlled focuser motion. The inner drawtube glides on 4 precision bearings and a roller shaft. The inner barrel is baffled and painted a flat black to minimize reflections for maximum contrast. This barrel is also black anodized and features a laser-etched mm millimeter scale.

It provides 1" of focus travel which is more than adequate for SCTs. You first use your SCTs focusing knob to achieve coarse focus and then switch to the Crayford focuser for finer focus and control.

Depending on your range of eyepieces and accessories, you may never need to touch your SCT's main focuser again! The 2" focuser barrel features a brass compression ring and can accept standard 2" refractor-type diagonals and other 2" accessories Note that the use of this focuser converts your telescope's rear SCT thread to a 2" visual back. As a result you will not be able to use an SCT-type diagonal with this focuser; you will need a refractor-type diagonal instead. Also included is a 1.

GSO's rated load capacity for their Crayford focusers is a little less than 6 lbs 2. The focuser also has two large thumbscrews. The thumbscrew on the telescope side can be used to lock the focuser, allowing the use of heavy accessories or cameras without fear or slippage or losing focus.

The other thumbscrew on the eyepiece end can be used to adjust the tension of the focuser to achieve a focusing "feel" that you like. At the easiest lightest setting, the focuser moves extremely smoothly. At tighter settings, you can still use heavier accessories without sacrificing much of the smooth focuser action. If you have a standard 1. The focuser is shipped in a foam-fitted box. This is caused by wear on the barrel anodizing where is makes contact with the roller bearings.

In some focusers, you have to look hard to find these marks.JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

Due to either high demand, or the specific nature of this product, lead times may run longer than other products. Contact us at info highpointscientific. This item is in stock and typically ships in 1 day or less. Regularly stocked item that is on order with the manufacturer and on its way to our warehouse. Expected to arrive within business days. Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

Upgrade your current focuser today with a new one from High Point Scientific! Our experts have picked the best of the best for you to choose from.

No matter what your budget is, we are confident you will find a focuser that suits your needs. The focuser is the link between the telescope itself and the eyepiece or camera. If it is shaky or jumpy when the draw tube is racked in or out or flexes when heavier eyepieces or accessories are introduced, your focuser can make observing almost impossible. A quality focuser should provide precise positioning of the eyepiece or camera to within.

At High Point, you will find affordable rack and pinion focusers and more advanced Crayford focusers. We also carry highly precise electric and motorized focusers. These are excellent because they virtually eliminate vibration by removing the need to touch the telescope.

The brands we carry at High Point Scientific. The manufacturers listed at any given time during your search refinement offer at least one product that matches other search criteria you have already chosen. Sometimes adapters come in sets, so we needed to differentiate between a single one item and a set or kit, which would include at least two adapters or spacers.

The type of threads, plate or barrel size on one side of the adapter, spacer, or other item. The side listed A or B doesn't mean anything except to designate one side from the other.

GSO 2" Dual Speed 10:1 Crayford Focuser for SCT Telescope w/ 1.25" Adapter

Use this filter if you are looking for a particular length. For instance, if you want a 25 mm extension, then click the Once you get those results, you can filter further by barrel size, thread type, etc. Minimum value. Items 1 - 25 of Show 5 10 15 20 Free shipping Free shipping.

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