TPO 12" f/4 Imaging Newtonian OTA

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TPO 12" f/4 Imaging Newtonian OTA
$799.00
Item # OS-12IN
OR
  • This big (12"!) fast f/4 Newtonian will do amazing things paired with a heavy-duty equatorial mount and your choice of imaging gear!
  • The interior of the telescope is painted matte black to eat up any stray light that might wander in, and a built-in low-vibration fan assists in cooling down your mirror and OTA, getting you to ambient temperature all that much faster so you can start imaging!
  • A 3.3" dual speed Crayford style focuser is strong and smooth, and comes with a 2" and 1.25" adapter plus a 2" 35mm extension for adjusting back focus.
  • Dual split-hinge rings are drilled on top and bottom for versatility, allowing you to attach a wide variety of accessories and connect your 12" Newtonian to a plethora of mounts.
  • Since this is a large and heavy optical tube (about 40 lb.), you will want to pick a mount with a large weight capacity.
  • The circumference of the this scope measured with paper = 44 ¾ inches.
Description

Details

About Third Planet Optics (TPO) Imaging Newtonian Telescopes…

If you are looking for a telescope that does a great job of imaging but doesn't come with the cost of a Ritchey-Chretien, check out the TPO Imaging Newtonian line of telescopes! All of our Imaging Newtonian optical tube assemblies, offered in apertures from 6" - 12", have very fast optics for the widest fields possible. Image with a DSLR or small webcam all the way up to large sensor CCD cameras with these inexpensive yet effective Newtonians.

The optics on all TPO Imaging Newtonians consist of a parabolic primary mirror and an elliptical secondary, or diagonal. The mirrors are made from B270 white water optical crown glass, which is more thermally stable than glass traditionally used on other reflectors. A 91% aluminum coating is applied, and then over-coated with a layer of quartz for the ultimate in durability. The primary mirror cell is very sturdy, and has six collimation knobs that can be adjusted by hand with a push or pull of the knob. Collimation is made even easier due to the center spot marked on the primary mirror. The diagonal mirror is held in place with a thin four-vane spider.

The optical tube assembly on the 3rd Planet Optics Imaging Newtonian telescope is made of rolled steel and painted white. The ends of the tube are die-cast aluminum, which contribute to the OTA's rigidity. Steel is a bit heavier than traditional aluminum, but since it has a lower coefficient of thermal expansion, your telescope will tend to hold its shape (and therefore, hold focus) as temperatures fluctuate throughout the night. The inside of the OTA is painted in a matte black finish, which stops stray light in its tracks.

A low vibration cooling fan is built into the primary mirror cell of the telescope to assist in cooling your optics down quickly. The fan is powered by a eight (8) AA batteries (not included) which are housed in an external battery pack.

A 3.3" dual-speed Crayford-style focuser rounds out this package. The ridged focusing knobs are easy to turn, even with gloves on, and the 10:1 microfocusing dial allows for very small changes, or tweaks, in focus. It takes ten turns of the microfocusing knob to equal just one turn of the larger knob. There is also a little knob on the bottom of the focuser that controls the tension, so that you can make adjustments depending on the weight or distribution of your load. The 3.3" opening steps down to a 2" compression ring adapter, and you will receive 1.25" compression ring adapter so that you can make use of all your eyepieces. A 35mm extension tube is also included to help you match the back-focus requirements of your imaging equipment. This is one nice focuser, and due to its steel drive rail and other upgrades, you will find that it suffers from very little flexure, even under heavier imaging payloads.

The telescope comes with dual split-hinged mounting rings that are made of die-cast aluminum and felted on the inside to cradle the OTA without scratching. There are threaded holes on the underside of the rings that allow installation on either a Vixen-style or Losmandy-style dovetail plate. The top of the rings is also drilled so that you can mount accessories.

All TPO Imaging Newtonians come with an 8x50 straight-through finderscope. The ocular has a non-illuminated crosshair and has 13mm of eye relief. A quick-release mounting bracket is also included.

TPO 12" f/4 Imaging Newtonian Highlights…

  • Aperture: 12"
  • Focal Ratio: f/4
  • Focal Length: 1220mm
  • White rolled steel exterior, flat black interior for higher contrast
  • 3.3" dual-speed 10:1 linear Crayford-style focuser with 35mm extension, 2" & 1.25" adapter
  • Dual hinged rings with Losmandy-style dovetail
  • Cooling Fan included.
  • Push/pull oversized collimation knobs for easy adjustments
  • Weight: 40 lb.

Additional Information

Additional Information

SKU OS-12IN
Manufacturer TPO
Telescope Series TPO Imaging Newtonian
Optical Design Newtonian Reflector
Mount Type None - Optical Tube Only
Warranty 2 Year Warranty
Telescope Aperture 12"
Telescope Focal Length 1220mm
Telescope Focal Ratio f/4
Optical Tube Weight 40.5 lbs.
Optical Coatings Aluminum
Tube Color or Finish Gloss White
Limiting Stellar Magnitude 14
Diagonal Included? No - Not Required
Finder Included 8 x 50 Optical Finder
OTA Mount Type Dual Rings
Reviews

Customer Reviews 3 item(s)

Awesome OTA
Been taking shots with this thing on my Atlas EQ-G. Was surprised the mount could handle it well. Comes with everything you need. They even designed the tube rings to be light weight. Well thought out astrograph and worth every cent. Can't wait to do some planetary work with it.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by David / (Posted on 11/2/2013)
This one's a keeper
I have owned several scopes in this size range from newtonians to cassegrains. I love refractors with great optics. I purchased this scope for public nights to mount on my modified atlas mount. After using this scope a couple of nights, I feel like I won the chinese mirror lottery. This scope has excellent optics. It shows coma away from the center as all f4 scopes will, but the detail it pulls in is incredible. The star test rivals my refractors. I find myself taking dso's to 250x+ magnifications regularly with this scope to look at details. Planets are great through this scope. Collimation is critical on this scope. When collimation is dead on, this scope is on par with much more expensive scopes. I have bought and sold a lot of scopes. I think I will be keeping this one for the long haul. Opt was great to deal with as usual.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Dale / (Posted on 4/29/2013)
This one's a keeper
I have owned several scopes in this size range from newtonians to cassegrains. I love refractors with great optics. I purchased this scope for public nights to mount on my modified atlas mount. After using this scope a couple of nights, I feel like I won the chinese mirror lottery. This scope has excellent optics. It shows coma away from the center as all f4 scopes will, but the detail it pulls in is incredible. The star test rivals my refractors. I find myself taking dso's to 250x+ magnifications regularly with this scope to look at details. Planets are great through this scope. Collimation is critical on this scope. When collimation is dead on, this scope is on par with much more expensive scopes. I have bought and sold a lot of scopes. I think I will be keeping this one for the long haul. Opt was great to deal with as usual. Review by Dale / (Posted on 4/28/2013)
Included Items

Included Items

  • TPO 12" f/4 Imaging Newtonian OTA
  • 3.3" TPO Dual-Speed Crayford Focuser
  • 2" Adapter
  • 1.25" Adapter
  • 35mm Extension Tube - 2"
  • 8X50 TPO Finder - White
  • Finder Bracket
  • Dual Rings
  • Losmandy Dovetail
  • Battery Box for Fans
  • Hex Wrench for Screws
  • Dust Caps
Questions & Answers

Product Questions

how lengt is the tube cm.
10
Will this scope work well on an azimuth mounted tripod as well?
7
What case is there available and recommended to transport and keep this telescope tube?
5
What is the total weight of this OTA with all the included accessories installed, i.e., the 2" Adapter, 1.25" Adapter, 35mm Extension Tube - 2", 8X50 TPO Finder, Finder Bracket, Dual Rings, and the Losmandy Dovetail? Thank you,
1
Will this OTA work on my Celestron CGEM-DX?
1
What is the outer diameter of the TPO 12" f/4 newtonian?
1
This OTA look like a 12" version of a Meade LXD 55 without the corrector plate. Is it the same manufacture?
1
I believe the OTA is steel with screws holding the OTA body to the mirror base. How many screws are used? How tight are the screw holes not to have any slop holding my 10" mirror base to the OTA body. I had to use plastic shims to keep a solid tight fit to stop the base from moving on the OTA.
-1
Is this telescope good for faint deep sky photography?
-4
What coma corrector / field flattener would be appropriate for this telescope?
-6
Being a imaging scope how good is it for plain viewing?
-21
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