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New Never Used Altair 60 EDF Doublet Refractor Telescope V3

New Never Used Altair 60 EDF Doublet Refractor Telescope V3
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New Never Used Altair 60 EDF Doublet Refractor Telescope V3New Never Used Altair 60 EDF Doublet Refractor Telescope V3New Never Used Altair 60 EDF Doublet Refractor Telescope V3New Never Used Altair 60 EDF Doublet Refractor Telescope V3
Price:  £399.00(Inc. 20% VAT)
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Model:  A60EDF
Brand:  Altair

Availability  

  

Generally In Stock, Please Confirm Before Ordering



2 Year Warranty On All New Items
(Excluding Batteries & Globes)



New Never used Altair 60 EDF Doublet Refractor. This unit has been purchased by Rother Valley Optics but has never been used.

A highly specified portable telescope, suitable for wide field imaging or visual use, day or night-time.
 
The Altair 60 EDF is our most compact telescope, and this a more refined version with an S-FPL53 doublet objective lens providing superior colour correction and a lighter more compact tube.

NEW V3 with X-Rings, Top rail, Optical Test Report, Black Anodised CNC Machined Focuser and rear Camera Rotator, plus longer 200mm dovetail bar for better balancing. You can upgrade your existing 60EDF rings by ordering the X-Rings separately here. Also the new 60EDF 0.8x Reducer is available here for existing 60EDF customers.
 
Test report, guaranteeing optical quality. The telescope is guaranteed to arrive in perfect collimation and comes with an optical test report showing guaranteed Strehl 0.95 or better in green light. Optical smoothness, figuring, and overall performance are very consistent, and every lens has a unique serial number linked to the glass batch and stated on the test report. Altair Astro pioneered this approach, leading on lens development, therefore guaranteeing our customers always get the best quality.
 
New X-Rings, plus upper and lower dovetail bars. The new X-Rings have a quick release side-cam lever, as well as allowing more attachment opportunities than the previous tube ring. The top dovetail rail has dual Arca-format and Vixen-format (44mm) profiles so you can use various dovetail clamps. It's now easier to attach accessories on top, such as the Altair 100mm Guide Scope Rings, Altair 60mm Mini Guider (MG60) etc. The MiniGuider 32 quick release bracket can be attached to the X-Rings directly too. A new longer 200mm Vixen-style dovetail bar is included for easier balancing. 

Rear Camera Rotator. The Altair 60EDF focuser has a rotating rear collar with locking screws allowing you to frame the object perfectly, without rotating the whole focuser, or the optical tube. This is a distinct advantage especially when mounting the telescope with other scopes, and motor focusers, to avoid the extra equipment fouling the mounting bars.
 
Dual Speed Imaging friendly focuser. Black Anodised CNC Rack n Pinion focuser, rear camera angle rotator, and 2" push-fit adaptor with triple thumbscrews hold your accessories securely. The focuser has tension-adjustment to handle heavy accessories, such as large eyepieces, diagonals, Hershel wedges, cameras, or the Daystar Quark. The draw-tube has 75mm travel, and a graduated scale in mm. This is a smooth accurate focuser for imaging. The course focus knob can be removed to attach a motor focuser. A Camera Rotator is included for easy framing. The reducer or flattener will screw directly into the rear Camera Rotator if you remove the rear 2" push-fit adaptor.
 
 
Oversized lens. The lens actually has a larger diameter than 60mm, however, to improve outer edge performance, it has been limited to 60mm. This improves the edge performance of the optics, and gives better "Bokeh" with an optimum focal ratio of F6.0. (350mm focal length). Performance is better than multi-element camera lenses costing many times the price, even when they are stopped down to give better star-images. Being designed for infinity focus, and lacking a mechanical iris, this telescope is sharper than a camera lens.
  
Attaching a finder scope. A finder scope or RDF (Red Dot Finder) bracket can be attached to either side of the X-Rings, or the focuser body.

Dew control. The aluminium tube achieves thermal equilibrium very quickly, and the metal construction conducts heat easily to and from the front optics (essential for imaging and dew control). The recommended heater is DewZapper 3-4" OD Dew Heater (DEWH-34) for the optical tube, and code DEWH-12 for a guide scope.
 
What you get: 

  • 60mm F6 ED Doublet refractor optical tube with retractable dewshield.
  • 60mm FPL53 ED Doublet Lens assembly, 360mm focal length, housed in a fully collimatable, CNC machined cell with serial number.
  • Optical test report in green light showing serial number of objective lens.
  • Focuser CNC Machined Black Anodised Dual Speed 1:10 ratio 2.5" Rack 'n Pinion (Geared) with brass rack gear and tension adjustment (ideal for imaging).
  • Rear Camera Rotator 2" to 1.25" eyepiece adaptor with brass compression rings.
  • Rear 2" Push-fit adaptor with 3x clamping thumbscrews for extra security and alignment.
  • Removal of Pushfit-adaptor allows threaded attachment of dedicated reducer and flattener.
  • Special "X-Rings" with quick release clamp and multiple mounting points.
  • 200mm longer dovetail bar with Vixen-format 44mm profile.
  • Combination top handle and dovetail rail with Dual Vixen-format and Arca-format profiles for guide scope attachment.
  • Anodised aluminium push-fit lens cap and rear 1.25" dust plug.

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Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Zygo Interferometer Testing For ED Refractor Telescopes!

We are extremely pleased to announce our Zygo Interferometer is now installed and ready for use! Our experienced staff can test refractor lenses up to 120mm aperture and provide a comprehensive 2 page report showing the optical quality and Strehl ratio, plus much more information. We are using the very latest Zygo MX software to provide a more detailed report compared to other standard reports.

 

The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. Continue reading for an explanation of the individual values and you can also see a test report that was done on one of our RVO Horizon 60 OTAs. 

We are offering certain telescopes with a Zygo test at an extra cost. Mainly ED doublets and triplets. All available telescopes with a Zygo test report are listed here. Just select Zygo Test Report from the drop down box at the top of the listing and we will test the optics in house and provide a full 2 page report with your scope. This will show you the optical quality of your telescope optics. We can also offer this service on your refractor telescope. Please get in touch for more details about this. 

At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope.  We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument. 

Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. 

You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. 

Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. 

All available telescopes are on the website at the link below and ones we've tested already that are available straight away are also listed.

https://www.rothervalleyoptics.co.uk/zygo-tested-refractors.html

Here is an example of the test what we provide. This was a test on one of our Horizon 60 ED OTA's.

For any questions about this amazing new service, please either call 01909774369 or email sales@rothervalleyoptics.co.uk.

 


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