Super fast hyperbolic newton astrograph by Telescopi Italiani

There is a certain kind of telescope that tells you exactly what it is trying to do. The TIn series from Telescopi Italiani is built for one job: produce a very wide, very well corrected imaging field at extremely fast focal ratios, and do it in a package that can live in a remote observatory without constant babysitting. This is not a casual weekend setup. It is a purpose built astrograph line aimed at serious imaging and research style workflows.

Why the TIn series exists and what makes it different

A fast Newtonian is not new. What is new here is the combination of a corrected hyperbolic Newton configuration with a large multi element corrector and a mechanical system designed around repeatable alignment. When you push into f 2.x territory, everything gets unforgiving. Collimation is not a suggestion, and mechanical flex is not a minor annoyance. Telescopi Italiani is leaning into that reality with a carbon sandwich structure and a secondary alignment approach that focuses on fine control without one adjustment fighting the next.

A native look at the Super Fast Hyperbolic Newton Astrograph from Telescopi Italiani

This line uses a hyperbolic primary mirror and a four element 120 mm corrector. The corrected field is listed at 67 mm, which matters if you are trying to cover large sensors without turning the corners into a compromise. They also call out illumination, stating more than 85 percent at the field edge for that 67 mm image circle. In practical terms, that is a clear signal this design is chasing both sharp stars and usable field coverage, not just speed on paper.

Two models with very fast focal ratios

There are two models in the TIn series.

The TIn 35 is a 350 mm clear aperture astrograph at f 2.3 with an 800 mm focal length. The published corrected field is 67 mm, with an 81 mm back focus from the rear flange. The listed weight is 25 kg, with overall dimensions given as 1070 x 448 x 480 mm.

The Tln 35 would be a perfect match for the AM7 mount, as seen in our ZWO AM7 Review

The TIn 45 steps up to a 450 mm clear aperture at f 2.2 with a 1000 mm focal length. It keeps the same 67 mm corrected field and the same 81 mm back focus. The listed weight is 47 kg, with overall dimensions given as 1230 x 550 x 580 mm.

Optical performance notes that matter in the real world

Telescopi Italiani publishes spot diagram RMS diameter figures across a 400 to 700 nm band. For the TIn 35 they list 4.6 micron on axis and 9.6 micron at 33.5 mm off axis. For the TIn 45 they list 5.4 micron on axis, 7.7 micron at 27 mm off axis, and 10.6 micron at 33.5 mm off axis. They also provide vignetting figures at common radii, with losses around the high single digits near 26 mm and mid teens near 33.5 mm from axis. The takeaway is simple: they are treating the full field as a designed outcome, not an afterthought.

Mechanics and remote control are part of the design, not accessories

Both models are described with a full carbon fiber sandwich tube and internal insert frames. They include an integrated electronic control system intended for Wi Fi and Ethernet operation, plus an automated thermal control system. The focuser is not a small add on either. It is listed as a 132 mm electronic focuser with a harmonic drive motor and ASCOM Alpaca compatibility. An automated dust cover is mentioned as an option, also described as ASCOM Alpaca compatible. There is also an optional TI 112 dovetail system intended to make balancing easier.

Collimation is the quiet headline here

Fast systems are only as good as their alignment stays over time. Telescopi Italiani highlights a proprietary secondary mirror alignment system described as X Y pivoting, with tilt and axial adjustments handled through rotation and translation in a way that aims to keep adjustments from interfering with each other. If that claim holds up in the field, it is not a small deal. The faster you go, the more you live or die by whether collimation is stable and repeatable, especially when nobody is standing next to the scope at 2 a m.

Who should pay attention to this

If you are imaging with smaller instruments and thinking about upgrading purely for aperture, this is a different conversation. The TIn series is aimed at people who value speed, wide corrected coverage, and remote operation. It is for survey style work, high throughput imaging, and advanced astrophotography setups where the telescope is one part of a larger system that needs to behave predictably. You will still need a mount that can carry it, a plan for handling large sensors, and a workflow that matches the data volume a fast wide field instrument can generate.

TIn 35 f/2.3 telescope model specifications

Optical design: Corrected hyperbolic Newtonian astrograph optimized for wide field imaging

Aperture: 350 mm clear aperture with quartz mirrors and enhanced aluminum coatings. Lightweight mirror option available on request

Focal length and speed: 800 mm focal length at f 2.3 for high throughput imaging

Field corrector: 120 mm four element ED lens corrector designed to keep stars tight across a large sensor

Central obstruction and corrected field: 45 percent linear obstruction with a 67 mm corrected image circle sized to cover sensors up to the IMX411 format corner to corner

Spot performance, 400 to 700 nm polychromatic RMS: 4.6 micron on axis and 9.6 micron at 33.5 mm off axis

Vignetting: 8 percent light falloff at 26 mm from center and 15.0 percent at 33.5 mm from center

Back focus: 81 mm measured from the rear flange for flexible imaging trains

Physical size: 1070 x 448 x 480 mm overall

Weight and structure: 25 kg OTA built around a full carbon fiber sandwich tube with internal insert frames for stiffness and thermal stability

Collimation system: Proprietary X Y pivoting secondary adjustment designed for fast, repeatable collimation

Remote control electronics: Integrated control system for full remote operation over Wi Fi and Ethernet

Thermal management: Fully automated thermal control system to help maintain focus and alignment as temperatures change

Focuser: 132 mm electronic focuser driven by a harmonic drive motor, ASCOM Alpaca compatible

Dust protection: Optional automated dust cover, ASCOM Alpaca compatible

Mounting and balance: Optional TI 112 dovetail system for quick, straightforward OTA balancing

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