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Explore Scientific 127mm Air-Spaced ED APO f/7.5 Triplet Refracting OTA Telescope

ITEM #
ES-ED127075-03
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  • Regular price $1,399.99

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  • Aperture: 127mm (5")
  • Focal Ratio: f/7.5
  • Focal Length: 952
  • Excellent value for an excellent refractor

DESCRIPTION

Explore Scientific 127mm Air-Spaced ED APO f/7.5 Triplet Refracting OTA Telescope

Why chose a refractor telescope for astronomy? One of the bonuses of ownership of a refractor is that, compared to standard reflector telescopes, they almost never require re-aligning of the optics (collimation). However, any telescope that is subjected to shock may require optical alignment. One bonus of owning a refractor is that, compared to standard reflector telescopes, they almost never require re-aligning of optics (collimation). However, any telescope that is subjected to shock may require optical alignment. Removing the dew shield, you can access the alignment screws, which you can adjust yourself by referring to the instructions. You can also send it to Explore Scientific's Service Center for alignment. A standard service charge applies. But why worry? At Explore Telescopes, they precision collimate every Explore Scientific telescope at the factory to give optimum performance. Although you may never need to adjust optical alignment, their ED APOs allow for optical centering to collimate the lens elements should the telescope ever require it. That's a bonus over fixed models.

The Explore Scientific 127mm f/7.5 ED APO Refractor Telescope is one of the most innovative ideas in high quality apochromatic designs. Beginning with a tube fashioned from aluminum and stainless steel, the difference begins with what goes inside - technology. Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed by Hoya Optical of Japan to enable the production of lenses that offer superior sharpness and color correction by minimizing the color dispersion (chromatic aberration, or the "false" color fringing seen around bright objects that happens when light rays pass through standard crown-and-flint doublet objectives). This glass type offers a more durable and long lasting solution to produce an optic to minimize chromatic aberration over delicate fluorite crystal objectives that are prone to fracturing and absorbing moisture. What's more, these true air-spaced apochromatic triplets have all the refinements like EMD (Enhanced Multilayer Deposition) coatings, which absolutely eliminates light scatter and maintains image contrast. Contrast is further enhanced with multiple baffles that mask and deflect unwanted stray light.

So, now we've set the scene... Here's a mechanically perfected set of optics but the next step is how to hold them in place so they can be used. What's Explore Telescope's answer? Make it so chances are you already have what it takes to mount an Explore Scientific 127mm f/7.5 ED APO Refractor Telescope already in your fleet - or to offer a high quality mount which will become an asset to your hobby. You can mount the ED 127 to many popular equatorial and Altaz mounts, including Explore Scientific's new TwiLight I and TwiLight II Altazimuth Mounts. Photographers, who are looking for super high resolution optics, can mount the optical tube assembly to their existing medium-duty camera tripod. A release knob allows the tube assembly to rotate so that the camera can be positioned at any angle. The Universal Adjustable Mounting Plate of the ED 127 fits on mounts supplied by Explore Scientific, Vixen, and Meade LXD55/75. It also attaches to photo tripods with standard USA or European thread attaching knobs.

Explore Scientific 127mm f/7.5 ED APO Refractor Telescope Features
  • Included Saddle Plate Fits Explore Scientific Mounts; Vixen Mounts; Meade LXD55/75 Mounts
  • Tube Weight with Standard Accessories: 15 lbs - 6.8 kgs.
  • Rack and Pinion Focuser
  • Two Inch Dielectric Diagonal
  • Dew Shield
  • Superior Hoya ED Optical Glass and EMD (Enhanced Multilayer Deposition) Coatings

 

OPT Product Number: ES-ED127075-03

SPECIFICATIONS

Aperture127 mm (5")
Dew Shield IncludedYes
Diagonal Included 2" Star Diagonal
Focal Ratiof/7.5
Focuser StyleRack & Pinion
Free ShippingYes
ManufacturerExplore Scientific
Mount Type OTA Only
Optical DesignTriplet
OTA Length34"
OTA Mount TypeDual Rings
OTA Outer Diameter130.4mm
OTA Weight22 lb.
Telescope SeriesExplore Triplet ED
WarrantyLifetime Warranty

INCLUDED ITEMS

  • ED 127 Optical Tube Assembly
  • 2" Diagonal
  • Dew Shield
  • Cradle Rings w/ Handle
  • Rack and Pinion Focuser
  • Vixen-Style Dovetail

Customer Reviews

Based on 4 reviews
5 ★
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  • Reviews

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BI
07/26/2011
Bob in San Marcos

Great Scope & Great Value

I picked up this scope from OPT at the SCAE a couple of weeks ago and I am very happy with my purchase. I have mounted it on my CGEM and in my opinion this is the right set up. The mount handles the scope very well, with no strain on the mount when propperly set up. The build quality is exceptional at this price point, you could pay alot more for a compairable scope but why? I have used the scope several times now and have found the views very pleasing and no C/A anywhere. The views of the moon and other very bright stars are pin-point sharp and false color free. Splitting double stars and seeing the true colors is very cool and M5 looks like a dandylion flower in the sky. Also when I got it home and unpacked it there was an added bonus of a 2-25mm eyepiece included that was not listed in the included items, a nice touch. I met Scott Roberts of Explore Scientific at OPT that day as well and he was very happy to spend some time with me going over the features of the scope. All in all, this scope is a great value. The build quality, features, the ATA style case and the on-going relationship with OPT add up to much more than the purchase price of the scope. Clear Skies, Bob

BI
07/26/2011
Bob in San Marcos

Great Scope and Great Value

I picked up this scope from OPT at the SCAE a couple of weeks ago and I am very happy with my purchase. I have mounted it on my CGEM and in my opinion this is the right set up. The mount handles the scope very well, with no strain on the mount when propperly set up. The build quality is exceptional at this price point, you could pay alot more for a compairable scope but why? I have used the scope several times now and have found the views very pleasing and no C/A anywhere. The views of the moon and other very bright stars are pin-point sharp and false color free. Splitting double stars and seeing the true colors is very cool and M5 looks like a dandylion flower in the sky. Also when I got it home and unpacked it there was an added bonus of a 2-25mm eyepiece included that was not listed in the included items, a nice touch. I met Scott Roberts of Explore Scientific at OPT that day as well and he was very happy to spend some time with me going over the features of the scope. All in all, this scope is a great value. The build quality, features, the ATA style case and the on-going relationship with OPT add up to much more than the purchase price of the scope. Clear Skies, Bob

GP
12/04/2010
Gene Pedrazzoli

The ES 127 is a Great Scope

When I picked up my ED127 APO the box was nicked, as perhaps a fork lift or machine might make. I asked the agent at UPS to document this in the event that there would be a problem. There wasn't! Alignment was spot on. Upon opening the box, I was flored at the quality case, packing, and general eye appeal of this scope. Now having a chance to use it several times, I can readily say that this ES 127ED delivers. You could spend double for a high end 5 inch refractor, but you really don't have to. You got it all here. Kudos to Scott and crew for designing a top-notch product.

DM
05/18/2010
David, Marietta, Ga.

amateur

127 APO arrived in solid case, packaged well except for dewshield area which arrived slightly scratched. Still waiting for OPT or ES to replace diagonal fastening screw which arrived bent due to shipping. Views are super thus far!!! No color around lunar rims, edges. Sharp stars all the way to the edges (which surpasses my WO80mm APO doublet. Sturdy construction and very solid, metal objective glass cover. Good value and a scope to pass down through time.