Levenhuk Ra R80 ED Doublet OTA

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Two-lens apochromatic refractor with extra-low dispersion optics. Aperture: 80mm. Focal length: 500mm

Refractor

Optical design

3.1

Aperture – the diameter of the light-collecting lens or mirror that the telescope uses to collect light

19.7

Focal length – the distance from the primary lens or mirror to the point at which the light is focused

Availability

Product ID	50955
Brand	Levenhuk, Inc., USA
Warranty	lifetime
EAN	5905555002552
Package size (LxWxH)	31.5x14.6x8.7 in
Shipping Weight	15.5 lb

Description

Levenhuk Ra R80 ED Doublet OTA is a two-lens apochromatic refractor with extra-low dispersion optics. This optical tube is perfect for astrophotography, especially for extended objects, and quite well for visual observations. It features a wide field of view, high resolution, and excellent mechanics. Due to its compact size and light weight, this optical tube is irreplaceable during trips. In addition, the kit includes robust aluminum case for storage and transportation.

The telescope effectively reduces chromatic aberration, transmits images of high contrast and clarity. Fully multi-coated optics allows for observing even faint stars. You can easily observe deep sky as well as outer space. Due to the dual-speed focuser, the 2'' accessories can be installed. The focuser provides a very precise sharpness adjustment.

The OTA is made of anodized aluminum and features a high-quality blackening inside. The quick-release thumbscrew allows for installing this OTA on most modern mounts.

Please note: Mount, tripod, and optical accessories are not included.

Features:

Wide-field short-focus apochromatic refractor
Fully multi-coated optics made of ED glass
Dual-speed focuser enables for 2'' accessories installing
High contrast of the picture, minimum chromatic distortion
Perfect for visual observations and astrophotography

The kit includes:

Telescope optical tube
Cleaning wipe
Aluminum case
Protective caps
User manual and lifetime warranty

specifications

Product ID	50955
Brand	Levenhuk, Inc., USA
Warranty	lifetime
EAN	5905555002552
Package size (LxWxH)	31.5x14.6x8.7 in
Shipping Weight	15.5 lb
Optical design	refractor
Optical scheme	apochromat
Optics material	ED
Optics coating	fully multi-coated
Objective lens diameter (aperture), in	3.1
Focal length, in	19.7
Highest practical power, x	160
Aperture ratio	f/6.25
Resolution threshold, arcseconds	1.45
Limiting stellar magnitude	11.62
Focuser	2", 2-speed, rack & pinion
Telescope control	manual
Optical tube mounting mode	quick-release 1/4" thumbscrew
Optical tube material	anodized aluminum
User level	experienced users, professionals
Assembly and installation difficulty level	easy
Observed object	planets of the Solar System
Pouch/case/bag in set	case

References
and downloads

User manual: Levenhuk Ra ED Doublet OTA (pdf)

(PDF, 436.99 Kb)

High-resolution images (zip)

(ZIP, 31.58 Mb)

click to
download

Questions and Answers

John Larsen (2015.04.18)

I've owned my Questar 3 1/2" standard since 1984, but have decided to buy a decent refractor for mostly terrestrial observing from my home. I have a SLIK Pro tripod. What mount/s does this model come with, and if I decide to take the plunge, can you help me select a "package" to include the diagonal and 2-3 decent lenses? Thanks a lot for your consideration. John L.

Customer service:

Hi John, Thanks for the query. Unfortunately, the Levenhuk Ra R80 ED Doublet OTA is currently out of stock and we do not expect it back any time soon. I'd recommend to check out Levenhuk Ra R80 ED Doublet Carbon OTA here at http://www.levenhuk.com/catalogue/telescopes/levenhuk-ra-r80-ed-doublet-carbon-ota/ This OTA does not come with a mount, it has a quick-release thumbscrew tube-mount assembly system. The highest practical power of this OTA is 160x. To find out what eyepiece is required to achieve it, you need to divide its focal length by the highest practical power (that's 500 divided by 160 in case of Ra R80 ED Doublet OTA). The answer is 3.13 mm and such eyepiece doesn't exist so you need to choose one of the closest, for example Levenhuk Ra 2" ED 35 mm Eyepiece.

robert (2015.03.15)

I would like to know how much back focus the Ra R80 ED doublet has

Customer service:

Hello Robert, Thank you for interest in Levenhuk products. The back focus of our 80mm refractor is 135.3mm, the distance between the end surface to the fron surface of the T2 mount is 80.3mm. The Levenhuk Ra R80 ED Doublet OTA is currently out of stock, but we have the same model with carbon fiber tube. You can find it here online: http://www.levenhuk.com/catalogue/telescopes/levenhuk-ra-r80-ed-doublet-carbon-ota/ Looking forward to your reply.

bob (2014.08.23)

you guys never answered glenns ?. about how this scope is for astrophotography. be it dslr or a ccd or cmos

Customer service:

Dear Bob, thank you for interest in Levenhuk products.
Yes, this scope is perfect for astrophotography. You can use both CCD or DSLR camera with this scope. To attach a DSLR camera, you will need an appropriate T-ring and a camera adapter. CCD camera cab be simply inserted into the focuser.

Is there any additional information you might need?

Looking forward to your reply.

mansour kargari (2014.08.04)

Hi,
I'm interested in buying the Ra R80 ED Doublet OTA. Does the 2" focuser has graduated scale mark or not?

Customer service:

Dear Mansour, thank you for your interest in Levenhuk products.
Yes, the 2'' focuser comes with the graduated scale mark.
Is there any additional information you might need?

SEE KAM KWONG (2014.06.10)

I am interested with Levenhuk Ra R80 ED Doublet OTA, I want to confirm that whether the ED glass is made of FPL-53 material?

Customer service:

Dear See Kam, thank you for interest in Levenhuk products! One ED glass is made of FPL53 ED and the other is NBM51. Is there any additional information you might need? Looking forward to your reply.

Glenn (2014.02.14)

Good day. I wanna buy a telescope- I've always dreamed of observing space beauties by myself! This idea just haunts my mind. I'd prefer one up to $800, which can help me to see planets and deep sky objects. I am thinking about astrophotography in the future (I have Nikon D3100). I've read some articles on the internet and now I know that the most important thing about telescopes is aperture. Please tell me, isn't 80 mm too small? Is it better to purchase a telescope with bigger objective lens? If this model is fine for me, then what accessories I might need?

Customer service:

Levenhuk Ra R80 ED Doublet OTA Telescope is very good for lunar and planetary observations. As compared to the similarly priced models, this model provides images of better quality. Eyepieces that come in useful for this telescope: Levenhuk Ra LER 3 mm Eyepiece http://www.levenhuk.com/catalogue/accessories/telescope-accessories/telescope-eyepieces/levenhuk-ra-ler-3mm-1-25-eyepiece/ ; Levenhuk Ra LER 6 mm Eyepiece http://www.levenhuk.com/catalogue/accessories/telescope-accessories/telescope-eyepieces/levenhuk-ra-ler-6mm-1-25-eyepiece/ ;
If you want a more universal model, consider the Levenhuk SkyMatic 105 GT MAK telescope: http://www.levenhuk.com/catalogue/telescopes/levenhuk-skymatic-105-gt-mak-telescope/ . It's suitable for both planetary and deep-sky observations.

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